Summary of the invention
In view of the foregoing deficiencies of prior art, detect in place the purpose of the present invention is to provide a kind of external module andMethod for controlling power supply, device and electronic equipment have the power supply shortage of external device (ED) for solving electronic equipment in the prior artThere is damage risk in effect control bring electronic equipment.
In order to achieve the above objects and other related objects, the present invention provides a kind of external module and detects in place and power supply controlDevice is connected with external module, and the external module detects in place and power supply control apparatus includes: input power sample conversion mouldBlock is connected with input power, carries out sampling processing to the input current of the input power, and exports input power sampling letterNumber；Output supply voltage feedback module, is connected with output port of power source, is acquired to the voltage of the output port of power source,And export out-put supply sampled signal；Signal processing module, respectively with the input power sample conversion module and the outputSupply voltage feedback module is connected, and handles the input power sampled signal and the out-put supply sampled signal, reallyWhether the fixed external module is in place, and whether in place and current power closed state generates switch according to the external moduleControl signal；Switch control module is connected with the signal processing module, input power and output port of power source respectively, according toThe switch control signal of the output of the signal processing module controls the input power to the output port of power sourcePower supply.
In one embodiment of the invention, the input power sample conversion module includes: sampling resistor, one end with it is describedInput power is connected, and the other end is connected with the switch control module；Differential voltage amplifying circuit, one end respectively with it is describedSampling resistor both ends are connected, and the other end is connected with the signal processing module, and the voltage amplification at the sampling resistor both ends is arrivedThe signal processing module is transported to after preset voltage value.
In one embodiment of the invention, the switch control module includes a p-type mosfet transistor.
In one embodiment of the invention, the output supply voltage feedback module includes a voltage branch circuit, to instituteThe voltage for stating output port of power source divide and the voltage after partial pressure is transported to the signal processing module.
The embodiment of the present invention also provides that a kind of external module detects in place and method for controlling power supply, the external module existPosition detection and method for controlling power supply include: to carry out sampling processing to the input current of input power, and export input power samplingSignal；The voltage of output port of power source is acquired, and exports out-put supply sampled signal；The input power is sampled and is believedNumber and the out-put supply sampled signal handled, determine whether external module in place, and according to the external module whetherIn place and current power closed state generates switch control signal；The input power is controlled according to the switch control signalPower supply to the output port of power source.
It is described to the input power sampled signal and the out-put supply sampled signal in one embodiment of the inventionIt is handled, determines whether external module is in place, and according to whether the external module in place and current power closed stateIf generating switch control signal includes: that the external module is not in place, when current power is closed, then it is generated as power-off signalThe switch control signal.
In one embodiment of the invention, if the external module is not in place, when current power is closed, pass through the power supplyThe voltage swing of output port determines whether the external module is legal, if the external module is legal, is generated as power supply and opensThe switch control signal of signal is opened, if the external module is illegal, is generated as the switch of power-off signalControl signal.
In one embodiment of the invention, if the external module is in place, when current power is opened, then it is generated as power supply and opensThe switch control signal of signal is opened, and detects load current, if current overload, is generated as the described of power-off signalSwitch control signal.
In one embodiment of the invention, if the external module is not in place, when current power is opened, within a preset timeIt is generated as the switch control signal of power-off signal.
The embodiment of the present invention also provides a kind of electronic equipment, including external module as described above detects in place and for automatically controlledDevice processed, and running has external module as described above to detect in place and method for controlling power supply.
As described above, external module of the invention detect in place and method for controlling power supply, device and electronic equipment have withIt is lower the utility model has the advantages that
1, the present invention provides legal flexible detection in place and powers on the control of lower electricity automatically, is effectively protected electronics and setsIt is standby to be damaged because of the illegal external module of misconnection or short circuit.
2, the present invention can also realize the function of load overcurrent protection, be not necessarily to complicated circuit, it is only necessary to which simple device isIt is achievable, at low cost, high reliablity, real-time height.
3, the present invention is not necessarily to the participation of CPU software, it is only necessary to which logical device can be completed, and substantially reduce software work amount.
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specificationOther advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realitiesThe mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing fromVarious modifications or alterations are carried out under spirit of the invention.It should be noted that in the absence of conflict, following embodiment and implementationFeature in example can be combined with each other.
It please refers to Fig.1 to Fig.3.It should be clear that this specification structure depicted in this specification institute accompanying drawings, ratio, size etc., only toCooperate the revealed content of specification, so that those skilled in the art understands and reads, being not intended to limit the invention can be realThe qualifications applied, therefore do not have technical essential meaning, the tune of the modification of any structure, the change of proportionate relationship or sizeIt is whole, in the case where not influencing the effect of present invention can be generated and the purpose that can reach, it should all still fall in disclosed skillArt content obtains in the range of capable of covering.Meanwhile in this specification it is cited as "upper", "lower", "left", "right", " centre " andThe term of " one " etc. is merely convenient to being illustrated for narration, rather than to limit the scope of the invention, relativenessIt is altered or modified, under the content of no substantial changes in technology, when being also considered as the enforceable scope of the present invention.
The purpose of the present embodiment is that providing, a kind of external module detects in place and method for controlling power supply, device and electronics are setIt is standby, effectively control bring electronic equipment is lacked in the presence of damage to the power supply of external device (ED) for solving electronic equipment in the prior artThe problem of bad risk.
External module of the invention described in detail below detects in place and method for controlling power supply, device and electronic equipmentPrinciple and embodiment makes those skilled in the art not need creative work and is appreciated that external module of the invention is examined in placeSurvey and method for controlling power supply, device and electronic equipment.
As shown in Figure 1, being detected in place the present embodiment provides a kind of external module and power supply control apparatus 100, with external mouldBlock 150 is connected, and the external module detects in place and power supply control apparatus 100 includes: input power sample conversion module 110,Output supply voltage feedback module 120, signal processing module 130 and switch control module 140.
Below to the input power sample conversion module 110 of the present embodiment, output supply voltage feedback module 120, signalProcessing module 130 and switch control module 140 are described in detail.
In this present embodiment, the input power sample conversion module 110 is connected with input power, to the input powerInput current carry out sampling processing, and export input power sampled signal.
Specifically, in this present embodiment, as shown in Fig. 2, the input power sample conversion module 110 includes: sampling electricityResistance 111 and differential voltage amplifying circuit 112.
Described 111 one end of sampling resistor is connected with the input power to be connected, the other end and the switch control module 140It is connected.
In this present embodiment, the sampling resistor 111 is connected in power supply circuit, according to the size of load current,The size of the sampling resistor 111 is matched with the size of the load current, and the sampling resistor 111 can arrive for several milliohmsSeveral hundred milliohms, input current, which flows through the sampling resistor 111, to generate corresponding electricity at 111 both ends of sampling resistorPressure, voltage are proportional with electric current.
In this present embodiment, described 112 one end of differential voltage amplifying circuit respectively with the 111 both ends phase of sampling resistorEven, the other end is connected with the signal processing module 130, by the voltage amplification at 111 both ends of sampling resistor to predeterminated voltageThe signal processing module 130 is transported to after value.
The differential voltage amplifying circuit 112 can sample dedicated chip and complete, INA301 used in the present embodiment,It, which amplifies 111 both ends differential voltage of sampling resistor, is converted to the voltage value of OK range and is sent to the signal processing module130。
In this present embodiment, the output supply voltage feedback module 120 is connected with output port of power source, to the power supplyThe voltage of output port is acquired, and exports out-put supply sampled signal.
Specifically, in this present embodiment, the output supply voltage feedback module 120 includes a voltage branch circuit, rightThe voltage of the output port of power source divide and the voltage after partial pressure is transported to the signal processing module 130.
The output supply voltage feedback module 120 is responsible for the power module voltage of output port carrying out feedback processing,In the present embodiment, the output supply voltage feedback module 120 is handled by voltage branch circuit, the power supply of output portVoltage is to suitable range and then is sent to the signal processing module 130.
In this present embodiment, the signal processing module 130 respectively with the input power sample conversion module 110 and instituteOutput supply voltage feedback module 120 is stated to be connected, to the input power sampled signal and the out-put supply sampled signal intoRow processing determines whether the external module 150 in place, and according to the external module 150 whether in place and current powerClosed state generates switch control signal.
In this present embodiment, the switch control module 140 respectively with the signal processing module 130, input power andOutput port of power source is connected, and controls the input according to the switch control signal of the output of the signal processing module 130Power supply of the power supply to the output port of power source.
In this present embodiment, the switch control module 140 includes a p-type mosfet transistor.
The switch control module 140 (in the present embodiment, can be p-type MOSFET circuit composition) receives from ADC numberAccording to sampling and the switch control signal of control unit, output supply voltage is carried out to open or close management.Specifically, ifSwitch control signal is low level, then opens modular power source, otherwise closedown module power supply.
In this present embodiment, the external module 150 provides a power input interface, inside have a 1K Ou MoPull down resistor.Further, if the 140 control module electric power starting of switch control module, output supply voltageInput supply voltage (in the present embodiment, such as 12V) will be equal to, otherwise the switch control module 140 closes MOSFET pipe.
To further illustrate input power sample conversion module 110, output supply voltage feedback module 120, signal processingThe principle and way of example of module 130 and switch control module 140, the present embodiment also provide a kind of external module and examine in placeSurvey and method for controlling power supply, as shown in figure 3, the external module detects in place and method for controlling power supply includes:
Step S110 carries out sampling processing to the input current of input power, and exports input power sampled signal；
Step S120 is acquired the voltage of output port of power source, and exports out-put supply sampled signal；
Step S130 handles the input power sampled signal and the out-put supply sampled signal, determines outerWhether portion's module 150 is in place, and whether in place and current power closed state generates switch control according to the external module 150Signal processed；
Step S140 controls confession of the input power to the output port of power source according to the switch control signalElectricity.
In this present embodiment, 150 module of external module whether open by the power supply in place with the switch control module 140Whether pass, which opens the two information, can be combined into four states, as shown in table 1 below.
Table 1
1) in this present embodiment, it is described to the input power sampled signal and the out-put supply sampled signal atReason determines whether external module 150 in place, and according to the external module 150 whether in place and current power closed stateIf generating switch control signal includes: that the external module 150 is not in place, when current power is closed, then it is generated as power supply closingThe switch control signal of signal.
State 1:
The external module 150 is not in place, the power switch of the switch control module 140.
In this case, because external module 150 is not in place, power supply is closed, so PMOSFET is to close.For example, defeatedEnter DC power supply (such as 12V) and be connected to PMOSFET switch, in addition input DC power (such as 12V) is also connected to by 11K Ohmic resistanceOutput port.So output port voltage is 12V at this time, load current is 0.
2) defeated by the power supply when current power is closed in this present embodiment, if the external module 150 is not in placeThe voltage swing of exit port determines whether the external module 150 is legal, if the external module 150 is legal, is generated as electricityThe switch control signal of source open signal is generated as the institute of power-off signal if the external module 150 is illegalState switch control signal.
State 2:
External module 150 is in place, and power supply is closed.
This state is at state 1, and external module 150 is connected on electronic equipment, but power supply is also in the feelings of closingCondition.Whether signal processing module 130 needs to detect external module 150 legal.
Specifically, as described in state 1, input DC power (such as 12V) is also connected to output end by 10K Ohmic resistanceMouthful, if external module 150 is legal, that is, include 1K ohm of the ground resistance that pulls down to, then forms one with 11K ohm for 1K ohmBleeder circuit, it will generate the voltage of about 1V in output port and feedback arrives, signal processing module 130 judges it for legal electricityResistance will then open power supply, switching state to state 3 in next step.It is not 1K (example to ground resistance if external module 150 is illegalIf short-circuit conditions are 0 ohm, open circuit situation is infinity, or other illegal resistance values), then the control of signal processing module 130 is openedClose control module 140 will not open power supply, state maintains state 2, can protect resistance equipment because open by mistake open power supply cause asShort-circuit conditions cause equipment damage.
3) in this present embodiment, if the external module 150 is in place, when current power is opened, then it is generated as electric power startingThe switch control signal of signal, and load current is detected, if current overload, it is generated as the described of power-off signal and opensClose control signal.
State 3:
External module 150 is in place, electric power starting.
This state is transformed from state 2, i.e., external module 150 is in place and legal, then switch control module 140 is openedPower supply, state are maintained at state 3.Because external module 150 is in place and powers, load current is not 0, normal externalModule 150 will generate the normal electric current of consumption, and processing module can also receive normal voltage, otherwise current overload, voltageIt can become larger, processing module detects that voltage becomes larger, and control switch control module 140 is carried out closing supply voltage, processing moduleOverload preset value can be set and be in real time compared sampled value with preset value.
4) it in this present embodiment, if the external module 150 is not in place, when current power is opened, gives birth within a preset timeThe switch control signal as power-off signal.
State 4:
External module 150 is not in place, electric power starting.
This state status, which is external module 150, is detached from electronic equipment from situation in place, such as the case where be unplugged.Once outerPortion's module 150 is not in place, then load current immediately becomes 0, after processing module detects state 4, can close in the given timeClose power supply.So state 4 is a unstable state, its NextState is state 1.
The embodiment of the present invention also provides a kind of electronic equipment, including detection and the confession in place of external module as described above 150Controller for electric consumption 100, and operation has external module 150 as described above detection and method for controlling power supply in place.
The step of below in conjunction with each state description electronic device works:
Step 1, electronic equipment powers on first, and the power switch control of default switch control module 140 is that power supply closes shapeState.
Step 2, signal processing module 130 determines current state according to two-way input voltage,
And then export corresponding power switch signal.
Concrete decision is as follows:
If 1) external module 150 is not in place, state 1, power control switch is high level, and MOSFET is closed, endMouth is not powered；
If 2) external module 150 is to connect, state 2, and then judges 150 legitimacy of external module, if illegal,Then state saves as 2, and power switch is in off state；
If 3) external module 150 is connects, and legal, power control switch is low level at this time, and MOSFET is opened,Port starts to power, and condition conversion is at state 3；
4) in the case of state 3, if external module 150 is still in place, working properly, electric current nonoverload, then power switchStill to open, state is maintained at state 3；
5) in the case of state 3, if external module 150 is in place, but current overload, then power supply is closed, and state switches toState 2 keeps certain time (can be set, such as 2 seconds) in state 2；Later back to 2)；
6) in the case of state 3, if module is unplugged, not in place, power supply is still opened, but load current is too small, shapeState switches to state 4, and keeping certain time (can be set, such as 1 second), then power supply is closed, replying state to state 1；
7) it after replying state to state 1, repeats the above process.
In conclusion the present invention provides legal flexible detection in place and powers on the control of lower electricity automatically, effectively protectShield electronic equipment is damaged because of the illegal external module of misconnection or short circuit；The present invention can also realize the function of load overcurrent protectionCan, it is not necessarily to complicated circuit, it is only necessary to which simple device can be completed, at low cost, high reliablity, and real-time is high；The present invention is not necessarily toThe participation of CPU software, it is only necessary to which logical device can be completed, and substantially reduce software work amount.So the present invention effectively overcomesVarious shortcoming in the prior art and have high industrial utilization value.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripeThe personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.CauseThis, includes that institute is complete without departing from the spirit and technical ideas disclosed in the present invention for usual skill in technical field such asAt all equivalent modifications or change, should be covered by the claims of the present invention.