CN112688558A - Voltage regulation method, voltage regulation circuit, electronic device, and readable storage medium - Google Patents

Abstract

The application provides a voltage regulation method, a voltage regulation circuit, electronic equipment and a readable storage medium, and belongs to the technical field of power supply circuits. The voltage regulation method comprises the following steps: acquiring load state information of the linear voltage stabilizing circuit; under the condition that the load state is a change state, the output voltage of the switching power supply circuit is regulated to be the sum of the output voltage of the linear voltage stabilizing circuit and the saturation voltage of a preset multiple, wherein the preset multiple is more than 1; under the condition that the load state is a stable state, the output voltage of the switching power supply circuit is regulated to be the sum of the output voltage of the linear voltage stabilizing circuit and the saturation voltage; the output voltage of the switching power supply circuit is the input voltage of the linear voltage stabilizing circuit. According to the embodiment of the application, the output voltage of the switching power supply circuit can be adaptively adjusted according to the load state, the optimization of transient response and voltage conversion efficiency is realized, the transient response performance can be improved, the power supply efficiency and the endurance effect of the electronic equipment are improved, and the power loss and the temperature rise are reduced.

Description

Voltage regulation method, voltage regulation circuit, electronic device, and readable storage medium

Technical Field

The application belongs to the technical field of power supply circuits, and particularly relates to a voltage regulating method, a voltage regulating circuit, electronic equipment and a readable storage medium.

Background

With the increasing market penetration rate of 5G and Internet of Things (IoT), the improvement of endurance of mobile terminal devices is imminent, and in the case of battery power supply such as a mobile terminal device, the efficiency optimization of a power conversion system is an important dimension for improving endurance performance, so that optimizing the conversion efficiency to save unnecessary power consumption becomes one of important directions for research of mobile terminal manufacturers.

The field of power conversion mainly includes switching power converters and linear power converters. The switching power Converter adopts a nonlinear architecture, and can achieve high efficiency when the input-output Voltage difference is large, but has the disadvantages that the output always superposes ripple waves of the switching frequency and high-frequency harmonic components thereof, the output Voltage is coupled with a large amount of noise components, the Electromagnetic Interference (EMI) is poor, the response time is slow due to the limitation of small signal transmission, internal logic unit delay, the phase margin of the loop, and the like, and the adjustment amount is limited due to the limitation of the Pulse Width Modulation (PWM) period, so that the switching power Converter is not suitable for supplying power to the loads sensitive to the noise such as radio frequency, Analog Digital Converter (ADC), Voltage Controlled Oscillator (VCO), Reference circuit (Reference), and the like. A Low Dropout regulator (LDO) belongs to a linear Power Supply, has no internal switching action, outputs no inherent interference of switching frequency, outputs only thermal noise of a material and slight broadcast noise, and has a very high Power Supply Rejection Ratio (PSRR) in a very wide frequency band range, so that an output voltage is much cleaner than that of the switching Power Supply, and a transient response is good, and is widely used in many occasions sensitive to noise and transient response. However, the LDO has the disadvantages that when the difference between the input voltage and the output voltage is large, the efficiency of the LDO is low, and the electric energy consumed in the LDO regulating tube is released in the form of heat energy to form a heat source, which affects the temperature rise of the system.

Therefore, in the field of power supply of mobile terminal devices, the advantages of the switching power converter and the LDO are often combined to form a power supply network, as shown in fig. 1, a high voltage is converted into a low voltage by the switching power converter to realize a relatively large voltage drop, and then the LDO is used to realize a clean output voltage. In the process, the inventor finds that at least the following problems exist in the prior art:

for the above power supply network, the output voltage of the switching power converter is uniformly set to a fixed value related to the saturation voltage of the LDO, which cannot satisfy the requirements of both the conversion efficiency and the transient performance.

Disclosure of Invention

An object of the embodiments of the present application is to provide a voltage regulating method, a voltage regulating circuit, an electronic device, and a readable storage medium, which can solve the problem in the related art that the requirements of the conversion efficiency and the transient performance cannot be satisfied at the same time.

In order to solve the technical problem, the present application is implemented as follows:

in a first aspect, an embodiment of the present application provides a voltage regulation method, where the method includes:

acquiring the load state of the linear voltage stabilizing circuit;

under the condition that the load state is a change state, the output voltage of the switching power supply circuit is regulated to be the sum of the output voltage of the linear voltage stabilizing circuit and the saturation voltage of a preset multiple, wherein the preset multiple is more than 1;

under the condition that the load state is a stable state, the output voltage of the switching power supply circuit is regulated to be the sum of the output voltage of the linear voltage stabilizing circuit and the saturation voltage;

the output voltage of the switching power supply circuit is the input voltage of the linear voltage stabilizing circuit.

In a second aspect, an embodiment of the present application provides a voltage regulation circuit, including:

the load state acquisition circuit is used for acquiring the load state of the linear voltage stabilizing circuit;

the regulating circuit is used for regulating the output voltage of the switching power supply circuit, wherein the output voltage of the switching power supply circuit is the input voltage of the linear voltage stabilizing circuit;

and the control circuit is used for adjusting the output voltage of the switching power supply circuit to be the sum of the output voltage of the linear voltage stabilizing circuit and a saturation voltage of a preset multiple under the condition that the load state is a change state, wherein the preset multiple is more than 1, and adjusting the output voltage of the switching power supply circuit to be the sum of the output voltage of the linear voltage stabilizing circuit and the saturation voltage under the condition that the load state is a stable state.

In a third aspect, embodiments of the present application provide an electronic device, which includes a processor, a memory, and a program or instructions stored on the memory and executable on the processor, where the program or instructions, when executed by the processor, implement the steps of the method according to the first aspect.

In a fourth aspect, embodiments of the present application provide a readable storage medium on which a program or instructions are stored, which when executed by a processor, implement the steps of the method according to the first aspect.

In a fifth aspect, an embodiment of the present application provides an electronic device, including: a linear voltage stabilizing circuit; a switching power supply circuit; and a voltage regulating circuit as in the second aspect, the voltage regulating circuit being for regulating an output voltage of the switching power supply circuit in accordance with a load state of the linear voltage regulating circuit.

In a sixth aspect, embodiments of the present application provide a chip, where the chip includes a processor and a communication interface, where the communication interface is coupled to the processor, and the processor is configured to execute a program or instructions to implement the method according to the first aspect.

In the embodiment of the application, the load state of the linear voltage stabilizing circuit is acquired in real time, the output voltage of the front-end switching power supply circuit is adaptively adjusted according to the load state, the optimization of transient response and voltage conversion efficiency is realized, the transient response performance can be improved in electronic equipment, the overall power supply efficiency and endurance effect are improved, and the power loss and temperature rise are reduced.

Drawings

FIG. 1 is a schematic diagram of a power supply network of a switching power converter and LDO in the related art;

FIG. 2 is a schematic flow chart of a voltage regulation method according to an embodiment of the present application;

FIG. 3 is a second flowchart of a voltage regulation method according to an embodiment of the present application;

FIG. 4 is a graph illustrating temperature, output current, and output voltage according to an embodiment of the present application;

FIG. 5 is a schematic diagram of a voltage regulation circuit according to an embodiment of the present application;

FIG. 6 is a second schematic diagram of a voltage regulation circuit according to an embodiment of the present application;

FIG. 7 is a third schematic diagram of a voltage regulation circuit according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

The voltage regulation method, the voltage regulation circuit, the electronic device, and the readable storage medium provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.

At present, linear voltage stabilizing circuit has been widely used in electronic equipment, and simultaneously in the electronic equipment power supply field, the power supply trend is close to the low pressure, wholly presents linear voltage stabilizing circuit's output voltage more and more low, peak current is big, load variation range is wide characteristics, consequently, the efficiency waste and the long time loss that lead to because of unnecessary saturation voltage margin need be improved urgently.

An embodiment of the present application provides a voltage regulation method, as shown in fig. 2, the voltage regulation method including:

step 202, acquiring a load state of the linear voltage stabilizing circuit;

step 204, under the condition that the load state is a change state, adjusting the output voltage of the switching power supply circuit to be the sum of the output voltage of the linear voltage stabilizing circuit and a saturation voltage of a preset multiple, wherein the preset multiple is more than 1, or more than 1 and less than 3; under the condition that the load state is a stable state, the output voltage of the switching power supply circuit is regulated to be the sum of the output voltage of the linear voltage stabilizing circuit and the saturation voltage; the output voltage of the switching power supply circuit is the input voltage of the linear voltage stabilizing circuit.

In the embodiment, the electronic equipment comprises a switching power supply circuit and a linear voltage stabilizing circuit, wherein the switching power supply circuit is connected with the linear voltage stabilizing circuit, the switching power supply circuit and the linear voltage stabilizing circuit form a power supply network, a relatively large voltage drop is realized by using the switching power supply circuit, and then a clean output voltage is realized by using the linear voltage stabilizing circuit. In the embodiment of the application, the load state of the linear voltage stabilizing circuit is acquired in real time, the output voltage of the front-end switching power supply circuit is adaptively adjusted according to the load state, the optimization of transient response and voltage conversion efficiency is realized, the transient response performance can be improved in electronic equipment, the overall power supply efficiency and endurance effect are improved, and the power loss and temperature rise are reduced.

The load of the electronic apparatus includes devices such as a sensor, a camera, a flash, a button, and a speaker. The linear voltage stabilizing circuit can be an LDO, and the switching power supply circuit can comprise a buck circuit, a boost circuit, a buck-boost circuit, a charge pump circuit, a flyback circuit and other switching power supplies.

Further, according to the load state, adjusting the output voltage of the switching power supply circuit specifically includes:

(1) when the situation that the load is in a change state is obtained, the situation that the load of the electronic equipment has a step event is shown, and at the moment, the output voltage of the switching power supply circuit is set to be linear stableThe sum of the output voltage of the voltage circuit and the saturation voltage of the preset multiple, for example, the output voltage of the switching power supply circuit is set to the sum of the output voltage of the linear voltage stabilizing circuit and the maximum saturation voltage of 2 times, i.e., V_out1＝V_out2+2×V_maxdropoutWherein V is_out1Indicating the output voltage, V, of a switching power supply circuit_out2Representing the output voltage, V, of a linear voltage regulator circuit_maxdropoutThe maximum saturation voltage is expressed and is related to parameters such as performance, model and the like of the linear voltage stabilizing circuit, the linear voltage stabilizing circuits with different performances or models are corresponding to the maximum saturation voltage, and the maximum saturation voltage corresponding to the performance or model of the linear voltage stabilizing circuit can be obtained in a table look-up mode.

(2) When the load is in a stable state, the load of the electronic equipment is indicated to have no step event or the step event is ended and enters the stable state, and at the moment, the output voltage of the switching power supply circuit is set to be the sum of the output voltage and the saturation voltage of the linear voltage stabilizing circuit, namely V_out1＝V_out2+V_dropoutWherein V is_out1Indicating the output voltage, V, of a switching power supply circuit_out2Representing the output voltage, V, of a linear voltage regulator circuit_dropoutThe saturation voltage is the minimum VDS voltage (i.e. drain-source voltage) required for ensuring that a regulating tube inside the linear voltage stabilizing circuit can stably work in a constant current region to realize the steady-state control of a closed loop, i.e. the minimum input-output voltage difference requirement in the LDO circuit.

In the related art, the output voltage is required to be greater than V based only on the full-load saturation voltage_out2+V_dropoutOr the output voltage is required to be greater than V only in consideration of the optimum transient response_out2+2×V_maxdropoutOn one hand, the efficiency of the linear voltage stabilizing circuit is reduced, the power consumption is dissipated by heat energy to cause temperature rise in the electronic equipment, and on the other hand, the efficiency of a stable state is greatly wasted in order to take care of transient performance, so that the service time of a battery power supply occasion is influenced. In the above manner, different power is set for the output voltage of the switching power supply circuit under the condition that the load is in different statesAnd (4) pressure value. Specifically, let V be when the load has a step event_out1＝V_out2+2×V_maxdropoutThereby improving the transient response capability of the circuit; when the load is in steady state, let V_out1＝V_out2+V_dropoutTherefore, the influence on the voltage conversion efficiency is avoided, and the power supply time of the battery is prolonged.

In a specific embodiment, as shown in fig. 3, the voltage regulation method includes:

step 302, judging whether the linear voltage stabilizing circuit is enabled, if so, enteringstep 304, otherwise, ending;

step 304, judging whether a load step signal is triggered, if so, enteringstep 306, otherwise, enteringstep 310;

step 306, triggering a transient response mechanism;

step 308, judging whether the load step event is finished, if so, enteringstep 310, otherwise, returning tostep 306;

step 310, trigger a steady state response mechanism.

In this embodiment, when the linear voltage stabilizing circuit is enabled, it is determined whether to trigger a load step signal, that is, whether the load changes, if the load changes, a transient response mechanism is performed, and if the load does not change or the load changes, a steady response mechanism is performed, where the transient response mechanism is a command V_out1＝V_out2+2×V_maxdropoutThe steady state response mechanism is order V_out1＝V_out2+V_dropout。

Further, in the embodiment of the present application, before adjusting the output voltage of the switching power supply circuit, the method further includes: acquiring the output current of a switching power supply circuit or the output current of a linear voltage stabilizing circuit, and acquiring the temperature of the linear voltage stabilizing circuit; and determining the saturation voltage according to the output current of the switching power supply circuit or the output current of the linear voltage stabilizing circuit and the temperature of the linear voltage stabilizing circuit.

In practical application, the saturation voltage requirement of the linear voltage stabilizing circuit is related to loads, and the saturation voltages under different loads have a difference of several times or even tens of times, specifically, the saturation voltages are saturatedVoltage is closely related to load size, load current and temperature. As shown in fig. 4, the maximum load current is obtained by taking the output voltage of the LDO of the electronic device as 1.0V and the maximum output current as 500mA as an example, and when the output current is 100mA, the saturation voltage V is obtained_dropout23mv is required; when the output current is 500mA, the saturation voltage V_dropout140mv is required. Obviously, at two different output currents, the saturation voltage V_dropoutWith a 117mv difference, i.e. a difference of approximately 5 times, the 117mv voltage difference will cause a drop in efficiency, corresponding to the energy being wasted in the form of heat energy. As shown in fig. 4, the saturation voltages are different for the same output current and different temperatures.

In the embodiment of the present application, the determination method of the saturation voltage is limited, and specifically, the saturation voltage corresponding to the output current of the linear voltage stabilizing circuit and the temperature of the linear voltage stabilizing circuit can be obtained in a table look-up manner. By the method, the accurate voltage value of the saturation voltage can be acquired, and the accuracy of the output voltage setting of the switching power supply circuit is further ensured.

Since the input current and the output current of the linear voltage regulator circuit are equal, the output current of this portion may be based on the output current of the linear voltage regulator circuit or may be the output current of the switching power supply circuit (i.e., the input current of the linear voltage regulator circuit).

The linear voltage stabilizing circuit is provided with a temperature difference acquisition module, such as an overheating protection module, so that the temperature detection of the linear voltage stabilizing circuit can be realized based on the temperature difference acquisition function.

Further, in the embodiment of the present application, the adjusting the output voltage of the switching power supply circuit includes: and according to the load state, adjusting the feedback information of the switching power supply circuit so as to adjust the output voltage of the switching power supply circuit.

In this embodiment, the manner of adjusting the output voltage of the switching power supply circuit is defined. Specifically, according to the load state, the dynamic adjustment of the output voltage of the switching power supply circuit is realized by adjusting the feedback information of the switching power supply circuit.

Further, in the embodiment of the present application, the feedback information of the switching power supply circuit includes at least one of: feedback resistance value, feedback reference voltage, input signal of pulse width modulation comparator.

In this embodiment, the adjustment of the output voltage is realized by changing the feedback resistance value of the switching power supply circuit, the feedback reference voltage, the ramp signal input from the PWM comparator, and the like by an analog control signal or a digital control signal. For example, a Dynamic Voltage Scaling (DVS) technique is applied to change the output Voltage of the switching power supply circuit when necessary.

Through the mode, the output voltage of the switching power supply circuit can be accurately and quickly adjusted, so that the transient response performance is improved, and the overall power supply efficiency and the endurance effect are improved.

Further, in the embodiment of the present application, the obtaining the load status of the linear voltage regulating circuit includes: detecting the current change rate of an output capacitor of the linear voltage stabilizing circuit; determining the load state as a change state under the condition that the current change rate is greater than or equal to a first preset threshold value; determining that the load state is a stable state under the condition that the current change rate is smaller than a second preset threshold value; and the second preset threshold is less than or equal to the first preset threshold.

In this embodiment, a manner of determining the load condition is defined by detecting a rate of change of current of an output capacitor of the linear voltage regulating circuit. Specifically, under the condition that the current change rate of the output capacitor of the linear voltage stabilizing circuit is greater than or equal to a first preset threshold, determining that a load step event occurs, namely that the linear voltage stabilizing circuit generates load change; and under the condition that the current change rate of the output capacitor of the linear voltage stabilizing circuit is smaller than a preset threshold value, determining that the load step event is ended and entering a steady state. The load state can be accurately determined by detecting the current change rate of the output capacitor of the linear voltage stabilizing circuit, so that the output voltage of the front-end switching power supply circuit is adaptively adjusted according to the load state, and the optimization of transient response and voltage conversion efficiency is realized.

Further, in the embodiment of the present application, the obtaining the load status of the linear voltage regulating circuit includes: information of a changing state of a load is received.

In this embodiment, another determination manner of the load state is defined. Specifically, when the linear voltage regulator circuit does not have a detection circuit inside, and the current change rate of the output capacitor cannot be detected, load step information may be generated by a Central Processing Unit (CPU) or other modules generating load change requirements, for example, information of a load change state directly generated by a sensor module is received, so as to adaptively adjust the output voltage of the front-end switching power supply circuit according to the load change state, and achieve optimization of transient response and voltage conversion efficiency.

In this case, when the output current of the linear voltage regulator circuit is stable for a period of time, it indicates that the load is in a stable state.

Embodiments of the present application provide a voltage regulating circuit, which is described in detail below with reference to fig. 5 to 7, wherein the voltage regulating circuit includes:

a loadstate obtaining circuit 506 for obtaining a load state of the linearvoltage stabilizing circuit 504;

a regulatingcircuit 508 for regulating the output voltage of the switchingpower supply circuit 502, wherein the output voltage of the switching power supply circuit is the input voltage of the linear voltage stabilizing circuit;

thecontrol circuit 510 is configured to adjust the output voltage of the switchingpower supply circuit 502 to the sum of the output voltage of the linearvoltage stabilizing circuit 504 and a saturation voltage of a preset multiple, where the preset multiple is greater than 1, in a case where the load state is a changing state, and adjust the output voltage of the switchingpower supply circuit 502 to the sum of the output voltage of the linearvoltage stabilizing circuit 504 and the saturation voltage in a case where the load state is a stable state.

In this embodiment, the electronic device includes a switchingpower supply circuit 502 and a linearvoltage regulator circuit 504, the switchingpower supply circuit 502 is connected to the linearvoltage regulator circuit 504, and the switchingpower supply circuit 502 and the linearvoltage regulator circuit 504 form a power supply network, and first a relatively large voltage drop is realized by the switchingpower supply circuit 502, and then a clean output voltage is realized by the linearvoltage regulator circuit 504. In the embodiment of the present application, the loadstate obtaining circuit 506 obtains the load state of the linearvoltage stabilizing circuit 504 in real time, and thecontrol circuit 510 adaptively adjusts the output voltage of the front-end switchingpower supply circuit 502 according to the load state, so as to achieve optimization of transient response and voltage conversion efficiency, improve transient response performance in an electronic device, improve overall power supply efficiency and endurance effect, and reduce power loss and temperature rise.

Further, according to the load state, adjusting the output voltage of the switching power supply circuit specifically includes:

(1) when the load is acquired to be in a change state, indicating that the load of the electronic equipment has a step event, at this time, the output voltage of the switching power supply circuit is set to be the sum of the output voltage of the linear voltage stabilizing circuit and a preset multiple of saturation voltage, for example, the output voltage of the switching power supply circuit is set to be the sum of the output voltage of the linear voltage stabilizing circuit and 2 times of maximum saturation voltage, namely V_out1＝V_out2+2×V_maxdropoutWherein V is_out1Indicating the output voltage, V, of a switching power supply circuit_out2Representing the output voltage, V, of a linear voltage regulator circuit_maxdropoutThe maximum saturation voltage is expressed and is related to parameters such as performance, model and the like of the linear voltage stabilizing circuit, the linear voltage stabilizing circuits with different performances or models are corresponding to the maximum saturation voltage, and the maximum saturation voltage corresponding to the performance or model of the linear voltage stabilizing circuit can be obtained in a table look-up mode.

(2) When the load is in a stable state, the load of the electronic equipment is indicated to have no step event or the step event is ended and enters the stable state, and at the moment, the output voltage of the switching power supply circuit is set to be the sum of the output voltage and the saturation voltage of the linear voltage stabilizing circuit, namely V_out1＝V_out2+V_dropoutWherein V is_out1Indicating the output voltage, V, of a switching power supply circuit_out2Representing the output voltage, V, of a linear voltage regulator circuit_dropoutIndicating the saturation voltage, which is the adjustment that is required to ensure the internal voltage of the linear voltage regulator circuitThe transistor can stably work in a constant current region to realize the minimum VDS voltage (namely drain-source voltage) required by the steady-state control of a closed loop, namely the minimum input-output voltage difference requirement in an LDO circuit.

In this way, different voltage values are set for the output voltage of the switchingpower supply circuit 502 in the case where the load is in different states. Specifically, let V be when the load has a step event_out1＝V_out2+2×V_maxdropoutThereby improving the transient response capability of the circuit; when the load is in steady state, let V_out1＝V_out2+V_dropoutTherefore, the influence on the voltage conversion efficiency is avoided, and the power supply time of the battery is prolonged.

The load of the electronic apparatus includes devices such as a sensor, a camera, a flash, a button, and a speaker. The linearvoltage regulator circuit 504 may be an LDO, and the switchingpower supply circuit 502 may include a buck circuit, a boost circuit, a buck-boost circuit, a charge pump circuit, a flyback circuit, and other switching power supplies. Thecontrol circuit 510 is integrated in the switchingpower supply circuit 502 or other devices with operation and storage functions are used, and the control signal sent by thecontrol circuit 510 to the adjustingcircuit 508 may be an analog signal or a digital signal.

Further, in this embodiment of the application, the voltage regulation circuit further includes:

acurrent detection circuit 512 for detecting an output current of the switchingpower supply circuit 502 or an output current of the linearvoltage stabilizing circuit 504;

atemperature detection circuit 514 for detecting the temperature of the linearvoltage regulator circuit 504;

thecontrol circuit 510 is further configured to determine the saturation voltage according to the output current of the switchingpower supply circuit 502 or the output current of the linearvoltage regulating circuit 504, and the temperature of the linearvoltage regulating circuit 504.

In this embodiment, the determination manner of the saturation voltage is limited, and specifically, the saturation voltage corresponding to the output current of the linearvoltage regulating circuit 504 and the temperature of the linearvoltage regulating circuit 504 can be obtained by a table look-up manner. By this means, an accurate voltage value of the saturation voltage can be obtained, and accuracy of setting the output voltage of the switchingpower supply circuit 502 is ensured.

It should be noted that, since the input current and the output current of the linearvoltage stabilizing circuit 504 are equal, the output current of this part can be equivalent to the output current of the linearvoltage stabilizing circuit 504 by using the output current of the switchingpower supply circuit 502, that is, as shown in fig. 6, thecurrent detection circuit 512 is disposed at one side of the switchingpower supply circuit 502, and thecurrent detection circuit 512 directly collects the output current of the switchingpower supply circuit 502 or marks the output current by using other conversion methods according to the switching power supply principle. The scheme can be used under the condition of some linearvoltage stabilizing circuits 504 without the output current detection function, so that the circuit cost is reduced, and the application scene is enlarged.

For the situation that the switchingpower supply circuit 502 is not suitable for current collection, the output current detection can also be implemented by the output current collection end of the linearvoltage stabilizing circuit 504, that is, as shown in fig. 5, thecurrent detection circuit 512 is disposed at one side of the linearvoltage stabilizing circuit 504 for detecting the output current of the linearvoltage stabilizing circuit 504. And the output signal may be output to thecontrol circuit 510 in an analog or digital quantized manner.

Thetemperature detection circuit 514 may be a temperature differential acquisition module, such as an over-temperature protection module, included in the linearvoltage regulator circuit 504 itself, so that the temperature detection of the linearvoltage regulator circuit 504 can be implemented based on the temperature differential acquisition function.

Further, in the embodiment of the present application, the loadstate obtaining circuit 506 is specifically configured to detect a current change rate of an output capacitor of the linearvoltage stabilizing circuit 504 of the electronic device, determine that the load state is a change state when the current change rate is greater than or equal to a first preset threshold, and determine that the load state is a stable state when the current change rate is less than a second preset threshold; or a load state acquisition circuit, which is specifically used for receiving the information of the change state of the load.

In this embodiment, a determination manner of the load status is defined, as shown in fig. 5 and fig. 6, the loadstatus obtaining circuit 506 is disposed at one side of the linearvoltage stabilizing circuit 504, that is, a load accelerator is disposed in the linearvoltage stabilizing circuit 504, and is determined by detecting a current change rate of an output capacitor of the linearvoltage stabilizing circuit 504, specifically, when the current change rate of the output capacitor of the linearvoltage stabilizing circuit 504 is greater than or equal to a first preset threshold, it is determined that a load step event occurs, that is, the linearvoltage stabilizing circuit 504 generates a load change; when the current change rate of the output capacitor of the linearvoltage stabilizing circuit 504 is less than the preset threshold, it is determined that the load step event has ended and the steady state is entered. The load state can be accurately determined by detecting the current change rate of the output capacitor of the linearvoltage stabilizing circuit 504, so that the output voltage of the front-end switchingpower supply circuit 502 is adaptively adjusted according to the load state, and the optimization of transient response and voltage conversion efficiency is realized.

In this embodiment, another determination manner of the load state is defined. Specifically, as shown in fig. 7, when the linearvoltage regulator circuit 504 does not have a detection circuit therein and cannot detect the current change rate of the output capacitor, the CPU or other module generating the load change requirement may generate load step information, and the CPU or other module generating the load change requirement is the loadstatus obtaining circuit 506, for example, receives the information of the load change status directly generated by the sensor module.

In this case, the load change of the linearvoltage stabilizing circuit 504 depends on the load change demand sent by the external function module, the generated load change demand is input to thecontrol circuit 510 in advance, the output voltage of the switchingpower supply circuit 502 is further increased to cope with the forthcoming load step change of the linearvoltage stabilizing circuit 504, and the output voltage of the switchingpower supply circuit 502 is further decreased according to the output current and the temperature information after the step change is completed and enters the steady state. In this case, the linearvoltage regulator circuit 504 does not integrate a load accelerator, which can reduce the circuit requirement for load step detection of the linearvoltage regulator circuit 504, expand the application scenarios, and save the chip cost.

In FIG. 7, thecurrent detection circuit 512 may be disposed on the side of the linearvoltage regulator circuit 504.

Further, in the embodiment of the present application, thecontrol circuit 510 is specifically configured to control the adjustingcircuit 508 to adjust the feedback information of the switchingpower supply circuit 502, so as to adjust the output voltage of the switchingpower supply circuit 502.

In this embodiment, the manner of adjusting the output voltage of the switchingpower supply circuit 502 is defined. Specifically, the dynamic adjustment of the output voltage of the switchingpower supply circuit 502 is realized by adjusting the feedback information of the switchingpower supply circuit 502 according to the load state.

Further, in the embodiment of the present application, the feedback information of the switchingpower supply circuit 502 includes at least one of the following: feedback resistance value, feedback reference voltage, input signal of pulse width modulation comparator.

In this embodiment, the adjustment of the output voltage is realized by changing the feedback resistance value of the switchingpower supply circuit 502, the feedback reference voltage, the ramp signal input from the PWM comparator, or the like by an analog control signal or a digital control signal. The output voltage of the switchingpower supply circuit 502 is changed when necessary, for example, using DVS techniques.

Through the mode, the output voltage of the switchingpower supply circuit 502 can be accurately and quickly adjusted, so that the transient response performance is improved, and meanwhile, the overall power supply efficiency and the endurance effect are improved.

Further, in the present embodiment, the feedback information sampling point of theregulation circuit 508 is disposed adjacent to the input capacitance of the linearvoltage regulation circuit 504.

In this embodiment, the adjustingcircuit 508 has a remote voltage compensation technique, i.e. the sampling point of the feedback information of the adjustingcircuit 508 is close to the input capacitance of the linearvoltage regulator circuit 504, so that the loss of the trace can be automatically compensated.

Optionally, anelectronic device 800 is further provided in this embodiment of the present application, and includes aprocessor 820, amemory 818, and a program or an instruction stored in thememory 818 and executable on theprocessor 820, where the program or the instruction is executed by theprocessor 820 to implement each process of the voltage adjustment method embodiment, and can achieve the same technical effect, and no further description is provided here to avoid repetition.

It should be noted that the electronic devices in the embodiments of the present application include the mobile electronic devices and the non-mobile electronic devices described above.

Fig. 8 is a schematic diagram of a hardware structure of an electronic device implementing an embodiment of the present application.

Theelectronic device 800 includes, but is not limited to:radio frequency unit 802,network module 804,audio output unit 806,input unit 808,sensors 810,display unit 812,user input unit 814,interface unit 816,memory 818, andprocessor 820, among other components.

Those skilled in the art will appreciate that theelectronic device 800 may further include a power supply (e.g., a battery) for supplying power to the various components, and the power supply may be logically connected to theprocessor 820 via a power management system, so as to manage charging, discharging, and power consumption management functions via the power management system. The electronic device structure shown in fig. 8 does not constitute a limitation of the electronic device, and the electronic device may include more or less components than those shown, or combine some components, or arrange different components, and thus, the description is omitted here.

Theprocessor 820 is configured to obtain a load state of the linear voltage stabilizing circuit of theelectronic device 800, and adjust an output voltage of the switching power supply circuit of theelectronic device 800 according to the load state, where the output voltage of the switching power supply circuit is an input voltage of the linear voltage stabilizing circuit.

In the embodiment of the application, the load state information of the linear voltage stabilizing circuit is acquired in real time, the output voltage of the front-end switching power supply circuit is adaptively adjusted according to the load state information, the optimization of transient response and voltage conversion efficiency is realized, the transient response performance can be improved in electronic equipment, the integral power supply efficiency and endurance effect are improved, and the power loss and temperature rise are reduced.

Further, theprocessor 820 is specifically configured to: under the condition that the load state is a change state, the output voltage of the switching power supply circuit is regulated to be the sum of the output voltage of the linear voltage stabilizing circuit and the saturation voltage of a preset multiple, wherein the preset multiple is more than 1; when the load state is a stable state, the output voltage of the switching power supply circuit is regulated to be the sum of the output voltage of the linear voltage stabilizing circuit and the saturation voltage.

Further, theprocessor 820 is further configured to: acquiring the output current of a switching power supply circuit or the output current of a linear voltage stabilizing circuit, and acquiring the temperature of the linear voltage stabilizing circuit; and determining the saturation voltage according to the output current of the switching power supply circuit or the output current of the linear voltage stabilizing circuit and the temperature of the linear voltage stabilizing circuit.

Further, theprocessor 820 is specifically configured to: according to the load state, adjusting feedback information of the switching power supply circuit to adjust the output voltage of the switching power supply circuit; wherein, the feedback information of the switching power supply circuit comprises at least one of the following: feedback resistance value, feedback reference voltage, input signal of pulse width modulation comparator.

Further, theprocessor 820 is specifically configured to: detecting the current change rate of an output capacitor of the linear voltage stabilizing circuit; determining the load state as a change state under the condition that the current change rate is greater than or equal to a first preset threshold value; determining that the load state is a stable state under the condition that the current change rate is smaller than a second preset threshold value; and the second preset threshold is less than or equal to the first preset threshold.

Further, theprocessor 820 is specifically configured to: information of a changing state of a load is received.

It should be understood that, in the embodiment of the present application, theradio frequency unit 802 may be used for transceiving information or transceiving signals during a call, and in particular, receiving downlink data of a base station or sending uplink data to the base station. Theradio frequency unit 802 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

Thenetwork module 804 provides wireless broadband internet access to the user, such as assisting the user in emailing, browsing web pages, and accessing streaming media.

Theaudio output unit 806 may convert audio data received by theradio frequency unit 802 or thenetwork module 804 or stored in thememory 818 into an audio signal and output as sound. Also, theaudio output unit 806 may also provide audio output related to a specific function performed by the electronic device 800 (e.g., a call signal reception sound, a message reception sound, etc.). Theaudio output unit 806 includes a speaker, a buzzer, a receiver, and the like.

Theinput unit 808 is used to receive audio or video signals. Theinput Unit 808 may include a Graphics Processing Unit (GPU) 8082 and amicrophone 8084, and theGraphics processor 8082 processes image data of still pictures or video obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on thedisplay unit 812, or stored in the memory 818 (or other storage medium), or transmitted via theradio unit 802 or thenetwork module 804. Themicrophone 8084 can receive sound and can process the sound into audio data, which can be converted into a format output transmittable to a mobile communication base station via theradio frequency unit 802 in the case of a phone call mode.

Theelectronic device 800 also includes at least onesensor 810, such as a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, a light sensor, a motion sensor, and others.

Thedisplay unit 812 is used to display information input by the user or information provided to the user. Thedisplay unit 812 may include adisplay panel 8122, and thedisplay panel 8122 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like.

Theuser input unit 814 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the first electronic device. Specifically, theuser input unit 814 includes atouch panel 8142 and other input devices 8144.Touch panel 8142, also referred to as a touch screen, may collect touch operations by a user on or near it. Thetouch panel 8142 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to theprocessor 820, and receives and executes commands sent by theprocessor 820. Other input devices 8144 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.

Further, thetouch panel 8142 can be overlaid on thedisplay panel 8122, and when thetouch panel 8142 detects a touch operation thereon or nearby, the touch operation is transmitted to theprocessor 820 to determine the type of the touch event, and then theprocessor 820 provides a corresponding visual output on thedisplay panel 8122 according to the type of the touch event. Thetouch panel 8142 and thedisplay panel 8122 may be provided as two separate components or may be integrated into one component.

Theinterface unit 816 is an interface for connecting an external device to theelectronic apparatus 800. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. Theinterface unit 816 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within theelectronic device 800 or may be used to transmit data between theelectronic device 800 and external devices.

Thememory 818 may be used to store software programs as well as various data. Thememory 818 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the mobile terminal, and the like. Additionally, thememory 818 may include high speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

Theprocessor 820 performs various functions of theelectronic device 800 and processes data by executing or executing software programs and/or modules stored in thememory 818 and invoking the data stored in thememory 818 to thereby perform overall monitoring of theelectronic device 800.Processor 820 may include one or more processing units; preferably, theprocessor 820 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications.

The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the voltage adjustment method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

The processor is the processor in the electronic device in the above embodiment. Readable storage media, including computer-readable storage media, such as Read-Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disks, etc.

The embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to execute a program or an instruction to implement each process of the voltage adjustment method embodiment, and the same technical effect can be achieved.

It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as system-on-chip, system-on-chip or system-on-chip, etc.

An embodiment of the present application further provides an electronic device, including: a linear voltage stabilizing circuit; a switching power supply circuit; and the voltage regulating circuit is used for regulating the output voltage of the switching power supply circuit according to the load state of the linear voltage stabilizing circuit, the electronic equipment can achieve the same technical effect of the voltage regulating circuit embodiment, and the details are not repeated here to avoid repetition.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (12)

1. A method of voltage regulation, comprising:

acquiring the load state of the linear voltage stabilizing circuit;

under the condition that the load state is a change state, adjusting the output voltage of the switching power supply circuit to be the sum of the output voltage of the linear voltage stabilizing circuit and a saturation voltage of a preset multiple, wherein the preset multiple is more than 1;

under the condition that the load state is a stable state, the output voltage of the switching power supply circuit is regulated to be the sum of the output voltage and the saturation voltage of the linear voltage stabilizing circuit;

the output voltage of the switching power supply circuit is the input voltage of the linear voltage stabilizing circuit.

2. The voltage regulating method according to claim 1, further comprising, before regulating the output voltage of the switching power supply circuit:

acquiring the output current of the switching power supply circuit or the output current of the linear voltage stabilizing circuit, and acquiring the temperature of the linear voltage stabilizing circuit;

and determining the saturation voltage according to the output current of the switching power supply circuit or the output current of the linear voltage stabilizing circuit and the temperature of the linear voltage stabilizing circuit.

3. The voltage regulation method of claim 1, wherein regulating the output voltage of the switching power supply circuit comprises:

according to the load state, adjusting feedback information of the switching power supply circuit to adjust output voltage of the switching power supply circuit;

wherein the feedback information of the switching power supply circuit comprises at least one of the following: feedback resistance value, feedback reference voltage, input signal of pulse width modulation comparator.

4. The voltage regulation method of any one of claims 1 to 3, wherein the obtaining the load condition of the linear voltage regulation circuit comprises:

detecting the current change rate of an output capacitor of the linear voltage stabilizing circuit;

determining the load state to be a change state under the condition that the current change rate is greater than or equal to a first preset threshold value;

determining that the load state is a stable state under the condition that the current change rate is smaller than a second preset threshold value;

wherein the second preset threshold is less than or equal to the first preset threshold.

5. The voltage regulation method of any one of claims 1 to 3, wherein the obtaining the load condition of the linear voltage regulation circuit comprises:

information of a changing state of a load is received.

6. A voltage regulation circuit, comprising:

the load state acquisition circuit is used for acquiring the load state of the linear voltage stabilizing circuit;

the adjusting circuit is used for adjusting the output voltage of the switching power supply circuit, wherein the output voltage of the switching power supply circuit is the input voltage of the linear voltage stabilizing circuit;

the control circuit is used for adjusting the output voltage of the switching power supply circuit to be the sum of the output voltage of the linear voltage stabilizing circuit and a saturation voltage of a preset multiple under the condition that the load state is a change state, wherein the preset multiple is more than 1, and adjusting the output voltage of the switching power supply circuit to be the sum of the output voltage of the linear voltage stabilizing circuit and the saturation voltage under the condition that the load state is a stable state.

7. The voltage regulation circuit of claim 6, further comprising:

the current detection circuit is used for detecting the output current of the switching power supply circuit or the output current of the linear voltage stabilizing circuit;

the temperature detection circuit is used for detecting the temperature of the linear voltage stabilizing circuit;

the control circuit is further configured to determine the saturation voltage according to an output current of the switching power supply circuit or an output current of the linear voltage stabilizing circuit, and a temperature of the linear voltage stabilizing circuit.

8. The voltage regulation circuit of claim 6,

the load state acquisition circuit is specifically used for detecting the current change rate of an output capacitor of the linear voltage stabilizing circuit, determining that the load state is a change state under the condition that the current change rate is greater than or equal to a first preset threshold, and determining that the load state is a stable state under the condition that the current change rate is less than a second preset threshold; or

The load state obtaining circuit is specifically configured to receive information of the change state of the load.

9. The voltage regulation circuit of claim 6,

the control circuit is specifically configured to control the adjustment circuit to adjust feedback information of the switching power supply circuit, so as to adjust an output voltage of the switching power supply circuit.

10. An electronic device comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, the program or instructions when executed by the processor implementing the steps of the voltage regulation method according to any one of claims 1 to 5.

11. A readable storage medium on which a program or instructions are stored, characterized in that said program or instructions, when executed by a processor, implement the steps of the voltage regulation method according to any one of claims 1 to 5.

12. An electronic device, comprising:

a linear voltage stabilizing circuit;

a switching power supply circuit; and

the voltage regulation circuit of any one of claims 6 to 9, for regulating the output voltage of the switching power supply circuit in dependence upon the load condition of the linear voltage regulation circuit.

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