【技术领域】【Technical field】
本实用新型涉及电压转换的技术领域，特别涉及一种功率电荷泵及使用该功率电荷泵的电源管理电路。The utility model relates to the technical field of voltage conversion, in particular to a power charge pump and a power management circuit using the power charge pump.
【背景技术】【Background technique】
有两种经典电路都被称为电荷泵(Charge Pump)，一种是应用于锁相环电路中，连接于鉴频鉴相器后级，通过对电容充放电产生较为稳定的电压，以便用于控制压控振荡器的频率；另一种是通过开关电容，用于电压转换，能提供较大输出电流的功率输出电路。本实用新型的电荷泵电路是后者的子类，此处为了区别，将后者称为功率电荷泵。现有技术中的功率电荷泵一般采用一个输入电压，可以产生比输入高的输出电压，也可以产生比输入低的输出电压，另外，其效率高于线性调压器。There are two classic circuits are called charge pumps (Charge Pump), one is applied in the phase-locked loop circuit, connected to the post-stage of the frequency detector and phase detector, and generates a relatively stable voltage by charging and discharging the capacitor, so that it can be used It is used to control the frequency of the voltage-controlled oscillator; the other is a power output circuit that can provide a larger output current for voltage conversion through switched capacitors. The charge pump circuit of the present utility model is a subclass of the latter, and here, the latter is called a power charge pump for distinction. The power charge pump in the prior art generally adopts an input voltage, can generate an output voltage higher than the input voltage, and can also generate an output voltage lower than the input voltage, and its efficiency is higher than that of a linear voltage regulator.
基于开关电容的电荷泵电路被广泛应用于电压转换电路中，可以实现较高的电压转换效率。与基于电感的直流-直流转换器相比，功率电荷泵无需体积较大的电感，其更适用于PCB电路等空间较小的应用，且成本较低。对于理想的开关来说，功率电荷泵的能量损耗可被忽略，在这种情况下，可以认为功率电荷泵电路的效率为100％。但现有的功率电荷泵电路只能以某些固定的倍率转换电压时，其理想功率为100％，而且这样的固定倍率是有限的几种，例如，现有技术中，针对同一个输入电压源，仅采用两个飞电容(Flying Capacitor)的应用，已有文献讨论过的VO/VIN(其中，VO为输出电压，VIN为输入电压)的倍率有：3倍、2倍、3/2倍、4/3倍、1倍、2/3倍、1/2倍、1/3倍；对于仅采用一个飞电容的应用，现有技术中存在的VO/VIN倍率有：2倍、1倍、1/2倍。通过增加飞电容的个数，可以产生更多可能的倍率，而更多的可能的倍率，有利于优化功率电荷泵的实际工作效率，例如，输入电压为3.3V，输出电压目标值为1.7V，对于仅一个飞电容的情形，只能采用1倍模式，产生3.3V电压，然后通过线性调压技术(线性调压技术只能降低电压)降为1.7V，其理想情况下的效率为1.7V/3.3V＝51.5％；而对于采用两个飞电容的情形，则可以采用2/3倍模式，产生2.2V电压，然后通过线性调压技术降为1.7V，其理想情况下的效率为1.7V/2.2V＝77.3％，这样就改善了工作效率。当输入电压VIN在一定范围内变化 时(例如，电池供电时，随着电池放电或充电，其输入电压会不断变化)，更多倍率模式有助于优化不同输入电压下的工作效率。虽然通过增加飞电容的个数可以产生更多可能的倍率，有利于优化功率电荷泵的实际工作效率，但成本会随之增加。Charge pump circuits based on switched capacitors are widely used in voltage conversion circuits, which can achieve high voltage conversion efficiency. Compared with inductor-based DC-DC converters, power charge pumps do not require bulky inductors, are more suitable for applications with smaller spaces such as PCB circuits, and are less costly. For an ideal switch, the energy loss of the power charge pump is negligible. In this case, the efficiency of the power charge pump circuit can be considered to be 100%. However, when the existing power charge pump circuit can only convert the voltage at certain fixed ratios, its ideal power is 100%, and such fixed ratios are limited. For example, in the prior art, for the same input voltage source, using only two flying capacitors (Flying Capacitor), the ratios of VO/VIN (where VO is the output voltage and VIN is the input voltage) that have been discussed in the literature are: 3 times, 2 times, 3/2 times, 4/3 times, 1 times, 2/3 times, 1/2 times, 1/3 times; for the application using only one flying capacitor, the VO/VIN ratios in the prior art are: 2 times, 1 times, 1/2 times. By increasing the number of flying capacitors, more possible multiples can be generated, and more possible multiples are conducive to optimizing the actual working efficiency of the power charge pump. For example, the input voltage is 3.3V, and the output voltage target value is 1.7V , for the case of only one flying capacitor, only 1 times mode can be used to generate 3.3V voltage, and then reduced to 1.7V through linear voltage regulation technology (linear voltage regulation technology can only reduce voltage), and its ideal efficiency is 1.7 V/3.3V=51.5%; and for the case of using two flying capacitors, you can use 2/3 times mode to generate 2.2V voltage, and then reduce it to 1.7V through linear voltage regulation technology. The ideal efficiency is 1.7V/2.2V=77.3%, thus improving work efficiency. When the input voltage VIN changes within a certain range (for example, when the battery is powered, the input voltage will continue to change as the battery is discharged or charged), more multiplier modes help to optimize the operating efficiency under different input voltages. Although more possible multiples can be generated by increasing the number of flying capacitors, which is beneficial to optimize the actual working efficiency of the power charge pump, but the cost will increase accordingly.
因此，有必要提供一种改进的技术方案来克服上述问题。Therefore, it is necessary to provide an improved technical solution to overcome the above problems.
【实用新型内容】【Content of utility model】
本实用新型的目的在于提供一种功率电荷泵及使用该功率电荷泵的电源管理电路，其可以实现使用较少的飞电容产生更多可能的倍率转换电压，从而优化功率电荷泵的实际工作效率。The purpose of the utility model is to provide a power charge pump and a power management circuit using the power charge pump, which can realize the use of less flying capacitors to generate more possible rate conversion voltages, thereby optimizing the actual working efficiency of the power charge pump .
为了解决上述问题，根据本实用新型的一个方面，本实用新型提供一种功率电荷泵，其包括第一电压源、第二电压源、电压转换模块、输出模块和驱动模块。所述电压转换模块包括电容C1、第一开关、第二开关、第三开关和第四开关，其中，第一电压源的负极和第二电压源的负极与地节点相连；第一开关和第三开关依次串联于第一电压源的正极与第二电压源的正极之间；第二开关和第四开关依次串联于地节点和电压输出端之间；电容C1的一端与第一开关和第三开关之间的连接节点相连，电容C1的另一端与第二开关和第四开关之间的连接节点相连；所述输出模块包括输出电容，所述输出电容连接于电压输出端和地节点之间；所述驱动模块输出驱动信号以控制各个开关的导通或者关断，其中，在控制第一开关和第二开关导通时，控制第三开关和第四开关关断；在控制第三开关和第四开关导通时，控制第一开关和第二开关关断。In order to solve the above problems, according to one aspect of the present invention, the present invention provides a power charge pump, which includes a first voltage source, a second voltage source, a voltage conversion module, an output module and a driving module. The voltage conversion module includes a capacitor C1, a first switch, a second switch, a third switch and a fourth switch, wherein the negative pole of the first voltage source and the negative pole of the second voltage source are connected to the ground node; the first switch and the second The three switches are sequentially connected in series between the positive pole of the first voltage source and the positive pole of the second voltage source; the second switch and the fourth switch are sequentially connected in series between the ground node and the voltage output terminal; one end of the capacitor C1 is connected to the first switch and the second The connection nodes between the three switches are connected, and the other end of the capacitor C1 is connected to the connection node between the second switch and the fourth switch; the output module includes an output capacitor, and the output capacitor is connected between the voltage output terminal and the ground node Between; the drive module outputs a drive signal to control the on or off of each switch, wherein, when the first switch and the second switch are controlled to be turned on, the third switch and the fourth switch are controlled to be turned off; When the switch and the fourth switch are turned on, the first switch and the second switch are controlled to be turned off.
进一步的，所述驱动模块输出的驱动信号包括第一驱动信号和第二驱动信号，其中，第一驱动信号与第一开关和第二开关的控制端相连，以控制第一开关和第二开关的导通或者关断；第二驱动信号与第三开关和第四开关的控制端相连，以控制第三开关和第四开关的导通或者关断。Further, the drive signal output by the drive module includes a first drive signal and a second drive signal, wherein the first drive signal is connected to the control terminals of the first switch and the second switch to control the first switch and the second switch turn on or off; the second drive signal is connected to the control terminals of the third switch and the fourth switch to control the turn on or turn off of the third switch and the fourth switch.
进一步的，所述四个开关都为MOS晶体管，第一驱动信号和第二驱动信号为时钟信号。Further, the four switches are all MOS transistors, and the first driving signal and the second driving signal are clock signals.
进一步的，第一驱动信号和第二驱动信号之间存在一定的死区时间，以避免四个开关同时导通。Further, there is a certain dead time between the first driving signal and the second driving signal, so as to prevent the four switches from being turned on at the same time.
进一步的，驱动信号为高电平时使对应的开关导通，驱动信号为低电平时 使对应的开关关断，当第一驱动信号为高电平时，第二驱动信号为低电平，满足如下关系：Further, when the driving signal is at a high level, the corresponding switch is turned on, and when the driving signal is at a low level, the corresponding switch is turned off. When the first driving signal is at a high level, the second driving signal is at a low level, satisfying the following relation:
V1＝VC1 (1)V1＝VC1 (1)
其中，V1为第一电压源的电压值，VC1为电容C1两端的电压值；Wherein, V1 is the voltage value of the first voltage source, and VC1 is the voltage value at both ends of the capacitor C1;
当第二驱动信号为高电平时，第一驱动信号为低电平，满足如下关系：When the second driving signal is at high level, the first driving signal is at low level, satisfying the following relationship:
VO＝V2-VC1 (2)VO＝V2-VC1 (2)
其中，VO为电压输出端的电压值，V2为第二电压源的电压值，VC1为电容C1两端的电压值；联合公式(1)和(2)求解得：VO＝V2-V1。Wherein, VO is the voltage value of the voltage output terminal, V2 is the voltage value of the second voltage source, and VC1 is the voltage value of both ends of the capacitor C1; combined formulas (1) and (2) are solved as follows: VO=V2-V1.
进一步的，所述电容C1为飞电容。Further, the capacitor C1 is a flying capacitor.
根据本实用新型的另一个方面，本实用新型提供一种电源管理电路，其包括：电池单元；电压调节电路，其基于电压单元提供的电压得到预定电压；功率电荷泵。According to another aspect of the present invention, the present invention provides a power management circuit, which includes: a battery unit; a voltage regulation circuit, which obtains a predetermined voltage based on the voltage provided by the voltage unit; and a power charge pump.
所述电池单元作为功率电荷泵中的第一电压源，所述电压调节电路作为功率电荷泵中的第二电压源；或者，所述电池单元作为功率电荷泵中的第二电压源，所述电压调节电路作为功率电荷泵中的第一电压源。所述功率电荷泵包括第一电压源、第二电压源、电压转换模块、输出模块和驱动模块。所述电压转换模块包括电容C1、第一开关、第二开关、第三开关和第四开关，其中，第一电压源的负极和第二电压源的负极与地节点相连；第一开关和第三开关依次串联于第一电压源的正极与第二电压源的正极之间；第二开关和第四开关依次串联于地节点和电压输出端之间；电容C1的一端与第一开关和第三开关之间的连接节点相连，电容C1的另一端与第二开关和第四开关之间的连接节点相连；所述输出模块包括输出电容，所述输出电容连接于电压输出端和地节点之间；所述驱动模块输出驱动信号以控制各个开关的导通或者关断，其中，在控制第一开关和第二开关导通时，控制第三开关和第四开关关断；在控制第三开关和第四开关导通时，控制第一开关和第二开关关断。The battery unit is used as the first voltage source in the power charge pump, and the voltage regulation circuit is used as the second voltage source in the power charge pump; or, the battery unit is used as the second voltage source in the power charge pump, and the The voltage regulating circuit is used as the first voltage source in the power charge pump. The power charge pump includes a first voltage source, a second voltage source, a voltage conversion module, an output module and a driving module. The voltage conversion module includes a capacitor C1, a first switch, a second switch, a third switch and a fourth switch, wherein the negative pole of the first voltage source and the negative pole of the second voltage source are connected to the ground node; the first switch and the second The three switches are sequentially connected in series between the positive pole of the first voltage source and the positive pole of the second voltage source; the second switch and the fourth switch are sequentially connected in series between the ground node and the voltage output terminal; one end of the capacitor C1 is connected to the first switch and the second The connection nodes between the three switches are connected, and the other end of the capacitor C1 is connected to the connection node between the second switch and the fourth switch; the output module includes an output capacitor, and the output capacitor is connected between the voltage output terminal and the ground node Between; the drive module outputs a drive signal to control the on or off of each switch, wherein, when the first switch and the second switch are controlled to be turned on, the third switch and the fourth switch are controlled to be turned off; When the switch and the fourth switch are turned on, the first switch and the second switch are controlled to be turned off.
与现有技术相比，本实用新型中的功率电荷泵增加有一个电压输入端，其可以利用电源管理电路中除电池单元外存在的更多其它电压，产生更多其它倍率，以实现使用较少的飞电容产生更多可能的倍率转换电压，从而优化功率电荷泵的实际工作效率。Compared with the prior art, the power charge pump in the utility model has an additional voltage input terminal, which can use more other voltages in the power management circuit except the battery unit to generate more other multipliers, so as to realize the use of more Fewer flying capacitors generate more possible rate conversion voltages, thereby optimizing the actual operating efficiency of the power charge pump.
【附图说明】【Description of drawings】
为了更清楚地说明本实用新型实施例的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本实用新型的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其它的附图。其中：In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention , for those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative labor. in:
图1为本实用新型在一个实施例中的功率电荷泵的电路示意图；Fig. 1 is the circuit diagram of the power charge pump in an embodiment of the utility model;
图2为图1中的功率电荷泵工作在第一相位时的等效工作电路图；Fig. 2 is the equivalent working circuit diagram when the power charge pump in Fig. 1 works in the first phase;
图3为图1中的功率电荷泵工作在第二相位时的等效工作电路图。FIG. 3 is an equivalent working circuit diagram of the power charge pump in FIG. 1 working in the second phase.
【具体实施方式】【Detailed ways】
为使本实用新型的上述目的、特征和优点能够更加明显易懂，下面结合附图和具体实施方式对本实用新型作进一步详细的说明。In order to make the above purpose, features and advantages of the utility model more obvious and understandable, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
此处所称的“一个实施例”或“实施例”是指可包含于本实用新型至少一个实现方式中的特定特征、结构或特性。在本说明书中不同地方出现的“在一个实施例中”并非均指同一个实施例，也不是单独的或选择性的与其他实施例互相排斥的实施例。除非特别说明，本文中的连接、相连、相接的表示电性连接的词均表示直接或间接电性相连。Reference herein to "one embodiment" or "an embodiment" refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. "In one embodiment" appearing in different places in this specification does not all refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments. Unless otherwise specified, the words connected, connected, and joined in this document mean that they are electrically connected directly or indirectly.
请参考图1所示，其为本实用新型在一个实施例中的功率电荷泵的电路示意图。所述功率电荷泵包括第一电压源(或称第一电压)V1、第二电压源(或称第二电压)V2、电压转换模块110、输出模块120和驱动模块130。Please refer to FIG. 1 , which is a schematic circuit diagram of a power charge pump in an embodiment of the present invention. The power charge pump includes a first voltage source (or called first voltage) V1 , a second voltage source (or called second voltage) V2 , a voltage conversion module 110 , an output module 120 and a driving module 130 .
所述电压转换模块110包括电容C1、第一开关S1、第二开关S2、第三开关S3和第四开关S4。其中，第一电压源V1的负极和第二电压源V2的负极与地节点GND相连；第一开关S1和第三开关S3依次串联于第一电压源V1的正极与第二电压源V2的正极之间；第二开关S2和第四开关S4依次串联于地节点GND和电压输出端VO之间；电容C1的一端与第一开关S1和第三开关S3之间的连接节点相连，电容C1的另一端与第二开关S2和第四开关S4之间的连接节点相连。在一个优选的实施例中，所述电容C1可以为飞电容(或称快速电容)，并且飞电容为陶瓷电容。The voltage conversion module 110 includes a capacitor C1, a first switch S1, a second switch S2, a third switch S3 and a fourth switch S4. Wherein, the negative pole of the first voltage source V1 and the negative pole of the second voltage source V2 are connected to the ground node GND; the first switch S1 and the third switch S3 are sequentially connected in series with the positive pole of the first voltage source V1 and the positive pole of the second voltage source V2 Between; the second switch S2 and the fourth switch S4 are sequentially connected in series between the ground node GND and the voltage output terminal VO; one end of the capacitor C1 is connected to the connection node between the first switch S1 and the third switch S3, and the capacitor C1 The other end is connected to the connection node between the second switch S2 and the fourth switch S4. In a preferred embodiment, the capacitor C1 may be a flying capacitor (or called a flying capacitor), and the flying capacitor is a ceramic capacitor.
所述输出模块120包括输出电容Co，所述输出电容Co连接于电压输出端VO和地节点GND之间。The output module 120 includes an output capacitor Co connected between the voltage output terminal VO and the ground node GND.
所述驱动模块130输出驱动信号以控制开关S1-S4的导通或者关断，其中， 在控制开关S1和S2导通时，控制开关S3和S4关断；在控制开关S3和S4导通时，控制开关S1和S2关断。在图1所示的实施例中，所述驱动模块130输出的驱动信号包括第一驱动信号CK1和第二驱动信号CK2，其中，第一驱动信号CK1与开关S1和S2的控制端相连，以控制开关S1和S2的导通或者关断；第二驱动信号CK2与开关S3和S4的控制端相连，以控制开关S3和S4的导通或者关断。在一个具体的实施例中，开关S1-S4都为MOS(Metal-Oxide-Semiconductor)晶体管，驱动信号CK1和CK2为时钟信号，第一电平为使各个开关导通的电平信号，比如，开关S1-S4都NMOS(N-Channel Metal Oxide Semiconductor)晶体管，驱动信号CK1和CK2为反相时钟信号，驱动信号为高电平时使对应的开关导通，驱动信号为低电平时使对应的开关关断，且使驱动信号CK1和CK2的高电平(即第一电平)时间不交叠(也可以说，第一驱动信号CK1和第二驱动信号CK2之间存在一定的死区时间)，这样，可以避免开关S1-S4同时导通。The drive module 130 outputs a drive signal to control the on or off of the switches S1-S4, wherein, when the control switches S1 and S2 are turned on, the control switches S3 and S4 are turned off; when the control switches S3 and S4 are turned on , control switches S1 and S2 to turn off. In the embodiment shown in FIG. 1, the driving signal output by the driving module 130 includes a first driving signal CK1 and a second driving signal CK2, wherein the first driving signal CK1 is connected to the control terminals of the switches S1 and S2 to To control the turn-on or turn-off of the switches S1 and S2; the second drive signal CK2 is connected to the control terminals of the switches S3 and S4 to control the turn-on or turn-off of the switches S3 and S4. In a specific embodiment, the switches S1-S4 are all MOS (Metal-Oxide-Semiconductor) transistors, the driving signals CK1 and CK2 are clock signals, and the first level is a level signal for turning on each switch, for example, Switches S1-S4 are all NMOS (N-Channel Metal Oxide Semiconductor) transistors. The drive signals CK1 and CK2 are inverse clock signals. When the drive signal is high level, the corresponding switch is turned on, and when the drive signal is low level, the corresponding switch is turned on. Turn off, and make the high level (that is, the first level) time of the driving signal CK1 and CK2 not overlap (it can also be said that there is a certain dead time between the first driving signal CK1 and the second driving signal CK2) , so that the switches S1-S4 can be avoided to be turned on at the same time.
为了便于理解本实用新型，以下参考图2-图3介绍图1中的功率电荷泵在一个实施例中的具体工作过程。In order to facilitate the understanding of the present invention, the specific working process of the power charge pump in FIG. 1 in an embodiment will be described below with reference to FIGS. 2-3 .
当第一驱动信号CK1为高电平时，第二驱动信号CK2为低电平，驱动模块130控制开关S1和S2导通，控制开关S3和S4关断，此时，图1中的功率电荷泵工作在第一相位，其等效工作电路图如图2所示，第一电压源V1对电容C1进行充电，稳态时满足如下关系：When the first drive signal CK1 is at a high level, the second drive signal CK2 is at a low level, the drive module 130 controls the switches S1 and S2 to turn on, and controls the switches S3 and S4 to turn off. At this time, the power charge pump in FIG. 1 Working in the first phase, its equivalent working circuit diagram is shown in Figure 2. The first voltage source V1 charges the capacitor C1, and the following relationship is satisfied in the steady state:
V1＝VC1 (1)V1＝VC1 (1)
其中，V1为第一电压源V1的电压值，VC1为电容C1两端的电压值。Wherein, V1 is the voltage value of the first voltage source V1, and VC1 is the voltage value of both ends of the capacitor C1.
当第二驱动信号CK2为高电平时，第一驱动信号CK1为低电平，驱动模块130控制开关S3和S4导通，控制开关S1和S2关断，此时，图1中的功率电荷泵工作在第二相位，其等效工作电路图如图3所示，稳态时满足如下关系：When the second drive signal CK2 is at a high level, the first drive signal CK1 is at a low level, the drive module 130 controls the switches S3 and S4 to be turned on, and controls the switches S1 and S2 to be turned off. At this time, the power charge pump in FIG. 1 Working in the second phase, its equivalent working circuit diagram is shown in Figure 3, and the following relationship is satisfied in the steady state:
VO＝V2-VC1 (2)VO＝V2-VC1 (2)
其中，V2为第二电压源V2的电压值，VC1为电容C1两端的电压值，VO为电压输出端VO上的电压值(其等于输出电容Co两端的电压值)。Wherein, V2 is the voltage value of the second voltage source V2, VC1 is the voltage value of the capacitor C1, and VO is the voltage value of the voltage output terminal VO (which is equal to the voltage value of the output capacitor Co).
由于稳态时，上述两个相位中的电容C1两端的电压保持不变，因此，联合公式(1)和(2)求解得：Since the voltage across the capacitor C1 in the above two phases remains unchanged in the steady state, the joint formulas (1) and (2) can be solved as follows:
VO＝V2-V1。VO=V2-V1.
综上可知，本实用新型中的功率电荷泵基于两个电源电压转换输出一个输出电压VO，且VO＝V2-V1，其中，V1为第一电压源V1的电压值，V2为第二电压源V2的电压值，因此，本实用新型中的功率电荷泵又可称为差值电荷泵。需要特别说明的是，当V2＜V1时，通过本实用新型还能产生负电压。In summary, the power charge pump in the present invention outputs an output voltage VO based on two power supply voltage conversions, and VO=V2-V1, where V1 is the voltage value of the first voltage source V1, and V2 is the second voltage source The voltage value of V2, therefore, the power charge pump in the utility model can also be called a differential charge pump. It should be noted that, when V2<V1, the utility model can also generate negative voltage.
随着现代电子系统设计越来越复杂，电子系统中除了电池单元电压外还需要更多其它电压，例如，平板电脑、智能手机、蓝牙耳机等系统中都配备有电源管理单元(Power Management Units)，其通常可支持多路电压输出，具体为，电源管理电路包括电池单元和电源调节电路，所述电压调节电路基于电池单元提供的电压得到多个预定的其它电压(或称非电池单元电压)。若将上述本实用新型中的功率电荷泵应用于电源管理电路中，则可以通过利用电池单元电压和电源管理电路中除电池单元电压外存在的其它电压(即电压调节电路输出的电压)构建更多其它倍率的电压模式，从而有助于优化功率电荷泵的效率。As the design of modern electronic systems becomes more and more complex, in addition to the voltage of the battery unit, other voltages are required in the electronic system. For example, systems such as tablet computers, smart phones, and Bluetooth headsets are equipped with power management units (Power Management Units) , which can usually support multiple voltage outputs, specifically, the power management circuit includes a battery unit and a power regulation circuit, and the voltage regulation circuit obtains multiple predetermined other voltages (or non-battery unit voltages) based on the voltage provided by the battery unit . If the above-mentioned power charge pump in the utility model is applied to the power management circuit, then it can be constructed by using the battery cell voltage and other voltages (that is, the output voltage of the voltage regulation circuit) in the power management circuit except the battery cell voltage. Multiple voltage modes with other ratios help optimize the efficiency of the power charge pump.
以下通过一个实施例具体介绍本实用新型中图1所示的功率电荷泵在电源管理电路中的应用。The application of the power charge pump shown in FIG. 1 in the utility model in the power management circuit is specifically introduced below through an embodiment.
以电源管理电路中的电池单元作为图1中的功率电荷泵的第二电压源V2，以电源管理电路中的电压调节电路作为图1中的功率电荷泵的第一电压源V1，当电池单元电压(其称为功率电荷泵的输入电压VIN)一定的情况下，采用不同的非电池单元电压(即所述电压调节电路基于电池单元电压输出的其它电压)作为第一电源电压V1，可得到不同的输出电压VO，以产生更多其它倍率(倍率等于VO/VIN)，从而实现使用较少的飞电容产生更多可能的倍率，进而有利于提高功率电荷泵的实际供电效率。在一个具体实施例中，假设功率电荷泵的输入电压(或称电池单元电压)VIN为3.3V，目标输出电压为3.4V，若使用现有技术中仅一个输入电压源、飞电容个数为两个的功率电荷泵，则该电荷泵采用2/3倍模式的供电效率最佳，采用2/3倍模式可以产生2.2V的输出电压VO，通过线性调压技术降为1.7V，则理想情况下的供电效率为1.7V/2.2V＝77.3％；若使用现有技术中仅一个输入电压源、飞电容个数为一个的功率电荷泵，则该电荷泵采用1倍模式的供电效率最佳，采用1倍模式可以产生3.3V的输出电压VO，通过线性调压技术降为1.7V，则理想情况下的供电效率为1.7V/3.3V＝51.5％；若使用本实用新型中的功率电荷泵，则输入电压VIN(3.3V)作为第二输入电压源V2，以所述电压调节电路输出的1.5V的其它电压作为第 一输入电压源V1，通过上述工作过程，可产生3.3V-1.5V＝1.8V的输出电压VO，然后通过线性调压器转换为1.7V，则理想情况下的供电效率为1.7V/(3.3V-1.5V)＝94.4％，且只用一个飞电容。由此可见，本实用新型可以实现使用较少的飞电容产生更多可能的倍率，进而有利于提高功率电荷泵的实际供电效率。The battery unit in the power management circuit is used as the second voltage source V2 of the power charge pump in Figure 1, and the voltage regulation circuit in the power management circuit is used as the first voltage source V1 of the power charge pump in Figure 1, when the battery unit When the voltage (which is called the input voltage VIN of the power charge pump) is constant, different non-battery cell voltages (that is, other voltages output by the voltage regulation circuit based on the battery cell voltage) are used as the first power supply voltage V1, which can be obtained Different output voltage VO can generate more other multiples (the multiple is equal to VO/VIN), so as to achieve more possible multiples with less flying capacitors, which in turn helps to improve the actual power supply efficiency of the power charge pump. In a specific embodiment, assuming that the input voltage (or battery cell voltage) VIN of the power charge pump is 3.3V, and the target output voltage is 3.4V, if only one input voltage source in the prior art is used, the number of flying capacitors is Two power charge pumps, the charge pump adopts the 2/3 times mode to have the best power supply efficiency, and the 2/3 times mode can generate an output voltage VO of 2.2V, which is reduced to 1.7V through linear voltage regulation technology, which is ideal Under the circumstances, the power supply efficiency is 1.7V/2.2V=77.3%; if a power charge pump with only one input voltage source and one flying capacitor is used in the prior art, the power supply efficiency of the charge pump adopting 1 times mode is the highest. Good, adopting 1 times mode can produce the output voltage VO of 3.3V, through the linear voltage regulation technology and reduce to 1.7V, then the power supply efficiency under the ideal situation is 1.7V/3.3V=51.5%; If use the power in the utility model For the charge pump, the input voltage VIN (3.3V) is used as the second input voltage source V2, and other voltages of 1.5V output by the voltage regulation circuit are used as the first input voltage source V1. Through the above working process, 3.3V- The output voltage VO of 1.5V=1.8V is then converted to 1.7V by a linear regulator, and the ideal power supply efficiency is 1.7V/(3.3V-1.5V)=94.4%, and only one flying capacitor is used. It can be seen that the utility model can realize more possible multipliers by using less flying capacitors, which is beneficial to improve the actual power supply efficiency of the power charge pump.
易于思及的是，也可以以电源管理电路中的电池单元作为图1中的功率电荷泵的第一电压源V1，以电源管理电路中的电压调节电路作为图1中的功率电荷泵的第二电压源V2，从而在功率电荷泵的输人电压VIN一定的情况下，采用不同的非电池单元电压，可产生更多其它倍率。It is easy to think that the battery unit in the power management circuit can also be used as the first voltage source V1 of the power charge pump in FIG. Two voltage sources V2, so that when the input voltage VIN of the power charge pump is constant, different non-battery unit voltages can be used to generate more other multiples.
综上所述，本实用新型中的功率电荷泵包括第一电压源V1、第二电压源V2、电压转换模块110、输出模块120和输出驱动模块130，该功率电荷泵基于这两个电源电压转换输出一个输出电压VO，且VO＝V2-V1，其可以利用电源管理电路中除电池单元电压外存在的更多其它电压，产生更多其它倍率，以实现使用较少的飞电容产生更多可能的倍率转换电压，从而优化功率电荷泵的实际工作效率。In summary, the power charge pump in the present invention includes a first voltage source V1, a second voltage source V2, a voltage conversion module 110, an output module 120 and an output drive module 130. The power charge pump is based on these two power supply voltages Convert and output an output voltage VO, and VO=V2-V1, which can use more other voltages in the power management circuit besides the battery cell voltage to generate more other multipliers, so as to use less flying capacitors to generate more possible multiplier conversion voltage, thereby optimizing the actual operating efficiency of the power charge pump.
在本实用新型中，“连接”、相连、“连”、“接”等表示电性相连的词语，如无特别说明，则表示直接或间接的电性连接。In the present invention, words such as "connection", "connection", "connection" and "connection" which indicate electrical connection, unless otherwise specified, indicate direct or indirect electrical connection.
需要指出的是，熟悉该领域的技术人员对本实用新型的具体实施方式所做的任何改动均不脱离本实用新型的权利要求书的范围。相应地，本实用新型的权利要求的范围也并不仅仅局限于前述具体实施方式。It should be pointed out that any changes made by those skilled in the art to the specific embodiments of the utility model will not depart from the scope of the claims of the utility model. Correspondingly, the scope of the claims of the present utility model is not limited only to the foregoing specific embodiments.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520301409.7UCN204633599U (en) | 2015-05-11 | 2015-05-11 | Power charge pump and power management circuit using the power charge pump |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520301409.7UCN204633599U (en) | 2015-05-11 | 2015-05-11 | Power charge pump and power management circuit using the power charge pump |
| Publication Number | Publication Date |
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| CN204633599Utrue CN204633599U (en) | 2015-09-09 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520301409.7UExpired - LifetimeCN204633599U (en) | 2015-05-11 | 2015-05-11 | Power charge pump and power management circuit using the power charge pump |
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| CN (1) | CN204633599U (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852570A (en)* | 2015-05-11 | 2015-08-19 | 无锡中星微电子有限公司 | Power charge pump and power management circuit with power charge pump |
| CN107425715A (en)* | 2017-07-12 | 2017-12-01 | 友达光电股份有限公司 | Power supply circuit |
| CN110492732A (en)* | 2018-05-14 | 2019-11-22 | 凌力尔特科技控股有限责任公司 | The hybrid switch power converter of high conversion ratio |
| CN115191152A (en)* | 2020-02-27 | 2022-10-14 | 昕诺飞控股有限公司 | Hybrid switched capacitor circuit with automatic charge balancing |
| CN115802544A (en)* | 2022-11-28 | 2023-03-14 | 深圳市微源半导体股份有限公司 | Light emitting diode dimming driving circuit working at low power supply voltage |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852570A (en)* | 2015-05-11 | 2015-08-19 | 无锡中星微电子有限公司 | Power charge pump and power management circuit with power charge pump |
| CN107425715A (en)* | 2017-07-12 | 2017-12-01 | 友达光电股份有限公司 | Power supply circuit |
| CN107425715B (en)* | 2017-07-12 | 2020-04-07 | 友达光电股份有限公司 | Power supply circuit |
| CN110492732A (en)* | 2018-05-14 | 2019-11-22 | 凌力尔特科技控股有限责任公司 | The hybrid switch power converter of high conversion ratio |
| CN115191152A (en)* | 2020-02-27 | 2022-10-14 | 昕诺飞控股有限公司 | Hybrid switched capacitor circuit with automatic charge balancing |
| CN115802544A (en)* | 2022-11-28 | 2023-03-14 | 深圳市微源半导体股份有限公司 | Light emitting diode dimming driving circuit working at low power supply voltage |
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| CP01 | Change in the name or title of a patent holder | Address after:A 530 Taihu international science and Technology Park building 214028 Qingyuan Road in Jiangsu province Wuxi City District 10 layer Patentee after:Zgmicro Corporation Address before:A 530 Taihu international science and Technology Park building 214028 Qingyuan Road in Jiangsu province Wuxi City District 10 layer Patentee before:WUXI VIMICRO Corp. | |
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| CX01 | Expiry of patent term | Granted publication date:20150909 |