CN104362839B - One kind of four converter control circuit, four light load converter and its control method - Google Patents

One kind of four converter control circuit, four light load converter and its control method Download PDF

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CN104362839B
CN104362839B CN 201410733488 CN201410733488A CN104362839B CN 104362839 B CN104362839 B CN 104362839B CN 201410733488 CN201410733488 CN 201410733488 CN 201410733488 A CN201410733488 A CN 201410733488A CN 104362839 B CN104362839 B CN 104362839B
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circuit
signal
voltage
compensation
current
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CN 201410733488
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CN104362839A (en )
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杭开郎
孙良伟
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矽力杰半导体技术(杭州)有限公司
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion
    • Y02B70/16Efficient standby or energy saving modes, e.g. detecting absence of load or auto-off

Abstract

本发明公开了一种四管变换器控制电路、四管变换器及其轻载控制方法,通过电压补偿电路产生电压补偿信号,电流补偿电路产生电流补偿信号,休眠模式控制电路比较电压补偿信号与预先设定的低钳电压,并根据比较结果指示四管变换器控制电路进入或退出休眠模式。 The present invention discloses a four converter control circuit, and a control method of four light-load converter to generate a current compensation signal generation voltage compensation signal, the current through the voltage compensation circuit compensating circuit, the sleep mode control signal comparison voltage compensation circuit low clamp predetermined voltage, and indicates four converter control circuit entering or exiting sleep mode according to the comparison result. 本方案通过电压补偿信号来控制四管变换器的休眠及开启,实现了直接通过电压补偿信号控制休眠及开启的目的,无需在进入脉冲频率调制模式后,再进行多次判断,避免了增加额外的轻载控制电路,使得电路简单化。 The program is controlled by a voltage compensation signal is turned on and a sleep four converters, to achieve the purpose of opening and direct control by the sleep signal voltage compensation without after entering a pulse frequency modulation mode, then determining a plurality of times, avoids additional the light load control circuit so that the circuit is simplified. 同时,在进入休眠模式时,增加了占空比信息保持电路,以保证电路在退出休眠模式时真空比信号的准确性。 Meanwhile, when entering the sleep mode, the duty cycle information holding circuit increases, in order to ensure the accuracy of the vacuum circuit is in the sleep mode than the exit signal.

Description

一种四管变换器控制电路、四管变换器及其轻载控制方法 One kind of four converter control circuit, four light load converter and its control method

技术领域 FIELD

[0001]本发明涉及变换器领域,尤其涉及一种四管变换器控制电路、四管变换器及其轻载控制方法。 [0001] The present invention relates to the field of converters, and particularly to a four converter control circuit, four light load converter and its control method.

背景技术 Background technique

[0002]四管Buck-Boost变换器具有输入输出同极性、开关管电压应力低、既可升压又可降压等优点,适用于低压输出场合。 [0002] four Buck-Boost converter having input and output polarity switches with low voltage stress, but also both buck boost, etc., suitable for low-voltage output applications.

[0003]对于四管Buck-Boost变换器平均电流控制的基本原理为:使电压补偿信号Vcqmp与电感电流平均值的信号Isense进行比较,得到电流补偿信号。 [0003] The basic principle for the average current four Buck-Boost converter is controlled: the voltage compensation signal Vcqmp average inductor current signal Isense are compared to obtain a current compensation signal. 在轻载时,通常是产生休眠控制信号,使电压变换器在工作和休眠两种状态下进行切换,在休眠状态下停止开关,从而降低轻载时的功耗,提高轻载效率。 At light load, typically generate a sleep control signal to switch the voltage converter working in two states and sleep, stop switch in the sleep state to reduce power consumption at light loads, improve light load efficiency.

[0004]目前,实现基于平均电流控制的四管Buck-Boost变换器的轻载控制方法为:当输出电压反馈信号FB小于第一阈值时,进入CCM模式,即连续工作模式;当电感电流平均值的信号I sense低于第二阈值时,进入PFM模式,即脉冲频率调制模式,在PFM模式中,根据输出电压反馈信号FB的大小实现在工作和休眠状态下的切换,从而达到轻载控制的目的。 [0004] Currently, light load control method Based on the average of four current control Buck-Boost converter is: When the output voltage feedback signal FB is lower than a first threshold value, into the CCM mode, i.e. continuous mode; when the average inductor current I sense a signal below a second threshold value, enters PFM mode, i.e., pulse frequency modulation mode, the PFM mode according to the magnitude of the output voltage feedback signal FB to achieve the switching operation and the sleep state, so as to achieve light-load control the goal of.

[0005]然而,采用上述方式实现轻载控制,需要在进入PFM模式之后,再继续进行判断,需要经过多次判断,这就需要增加额外的轻载控制电路,增加了电路的复杂度。 [0005] However, the above-described light load control mode, after entering the PFM mode requires, then continued determination, take multiple determination, which requires additional light load control circuit increases the complexity of the circuit.

发明内容 SUMMARY

[0006]有鉴于此,本发明提供一种四管变换器控制电路、四管变换器及其轻载控制方法,以解决现有技术中需要额外增加轻载控制电路,增加了电路的复杂度的问题,其具体方案如下: [0006] Accordingly, the present invention provides a four converter control circuit, four light load converter and its control method to solve the complexity of the prior art requires additional light load control circuit, increases the circuit's the problem, which specific programs as follows:

[0007] —种四管变换器控制电路,包括:电压补偿电路,与所述电压补偿电路相连的休眠模式控制电路,与所述电压补偿电路及休眠模式控制电路分别相连的电流补偿电路,与所述休眠模式控制电路及电流补偿电路分别相连的占空比信息保持电路,与所述电流补偿电路相连的开关控制信号产生电路,其中: [0007] - four kinds of converter control circuit, comprising: a voltage compensation circuit, and a sleep mode voltage compensation circuit coupled to the control circuit, the circuit current compensation circuit are connected to the voltage control compensation circuit and a sleep mode, and duty cycle information the sleep mode control circuit and a current compensation circuit connected to the respective holding circuits, and said current switch control signal generating circuit connected to the compensation circuit, wherein:

[0008]所述电压补偿电路用于接收输出电压反馈信号和基准电压信号,并将接收到的所述输出电压反馈信号和基准电压信号进行误差比较和补偿,获取电压补偿信号; [0008] The voltage compensation circuit for receiving an output voltage feedback signal and the reference voltage signal, and received by the output voltage feedback signal and the reference voltage signal and for comparing the error compensation, the compensation voltage signal acquisition;

[0009]所述休眠模式控制电路用于接收所述电压补偿信号,并将所述电压补偿信号与预先设定的低钳电压进行比较,得到比较结果,所述比较结果用于指示进入或退出休眠模式; [0009] The sleep mode control circuit for receiving the compensation voltage signal and the compensation signal and the low-voltage clamp comparison voltage set in advance to obtain a comparison result, the comparison result is used to indicate to enter or exit sleep mode;

[0010]所述电流补偿电路用于接收所述电压补偿信号及电感电流平均值信号,进行误差比较和补偿,产生电流补偿信号; [0010] The current compensation circuit for receiving the compensation voltage signal and the average inductor current signal, and comparing the error compensation, the compensation signal generating a current;

[0011]所述占空比信息保持电路用于在休眠模式下通过保持所述电流补偿信号来保持占空比信息; [0011] The duty cycle information holding circuit for holding in a sleep mode duty cycle of the holding current compensation information signal;

[0012]所述开关控制信号产生电路用于根据所述电流补偿信号、锯齿波信号和时钟信号产生开关控制信号来控制功率管的导通状态。 [0012] The switching control signal generating circuit for generating a conduction state the power switch control signal to control the tube current according to the compensation signal, the sawtooth signal and a clock signal.

[0013]进一步的,所述休眠模式控制电路为:第一比较器, [0013] Further, the sleep mode control circuit: a first comparator,

[0014]所述第一比较器用于比较所述电压补偿信号及低钳电压,并输出比较结果,具体的: [0014] The first comparator for comparing the voltage clamp and the low voltage compensation signal, and outputs a comparison result, specifically:

[0015]当所述电压补偿信号小于所述预先设定的低钳电压时,比较结果为低电平,当所述电压补偿信号大于所述预先设定的低钳电压时,比较结果为高电平。 [0015] When the voltage-compensation signal is less than the predetermined voltage set lower jaw, the comparison result is low, when the voltage is greater than the predetermined compensation signal is set low clamp voltage, the comparison result is high level.

[0016]进一步的,所述占空比信息保持电路为第一开关Kl, [0016] Further, the duty cycle of a first information holding circuit switches Kl,

[0017]所述第一开关Kl用于在接收到所述比较结果为低电平时断开,在接收到所述比较结果为高电平时闭合。 [0017] In the first switch Kl for receiving the comparison result is low off is high closed receiving the comparison result.

[0018]进一步的,所述占空比信息保持电路包括:第二开关K2,第一非门NI,受控电压模块,其中: [0018] Further, the duty ratio information holding circuit comprises: a second switch K2, the NI first NAND gate, controlled voltage module, wherein:

[0019]所述第二开关K2的静触点与电流补偿电路相连,动触点分别与第一非门NI及受控电压模块相连,所述第一非门的另一端与所述休眠模式控制电路相连; [0019] The second fixed contact of switch K2 is connected to the current compensation circuit, the movable contact connected to the first NAND gate controlled voltage module and NI, respectively, of the first NAND gate and the other end of the sleep mode The control circuit is connected;

[0020]所述比较结果为低电平时,所述第二开关K2闭合,所述受控电压模块供电;所述比较结果为高电平时,所述第二开关K2断开,所述电压补偿信号接入。 [0020] The comparison result is low, the second switch K2 is closed, the voltage controlled power supply module; high level when the comparison result, the second switch K2 is turned off, the voltage compensator signal access.

[0021]进一步的,所述电压补偿电路包括:第一误差放大器及第一补偿电路,其中: [0021] Further, the voltage compensation circuit comprising: a first error amplifier and a first compensation circuit, wherein:

[0022]所述第一误差放大器的输出端通过第一补偿电路接地。 An output terminal [0022] the first error amplifier by a first compensation circuit ground.

[0023]进一步的,所述电流补偿电路包括:第二误差放大器及第二补偿电路,其中: [0023] Further, the current compensation circuit comprises: a second error amplifier and a second compensation circuit, wherein:

[0024]所述第二误差放大器的输出端连接所述休眠模式控制电路的输出端的同时,通过第二补偿电路接地。 While [0024] the output of the second error amplifier connected to the output terminal of the sleep mode control circuit ground through a second compensating circuit.

[0025]进一步的,所述开关控制信号产生电路包括:第二比较器,第三比较器,正向偏置电源及逻辑电路,其中: [0025] Further, the switching control signal generating circuit comprises: a second comparator, the third comparator, a forward bias power supply and the logic circuit, wherein:

[0026]所述第二比较器的正向输入端通过正向偏置电源与所述电流补偿电路的输出端相连,所述第二比较器的反向输入端与所述第三比较器的反向输入端同时接收锯齿波信号,所述第三比较器的正向输入端与所述电流补偿电路的输出端相连,所述逻辑电路同时与所述第二比较器及第三比较器的输出端相连,同时接收时钟信号。 [0026] The second positive input of the comparator through the output of the forward bias power supply and the current compensation circuit is connected to the inverting input of the second comparator and the third comparator simultaneously receiving an inverting input sawtooth wave signal, the positive input of said third comparator is connected to an output terminal of said current compensation circuit, the logic circuit simultaneously with said second comparator and the third comparator an output terminal connected to receive a clock signal at the same time.

[0027] —种四管变换器轻载控制方法,应用于四管变换器控制电路,包括: [0027] - four kinds of light load inverter control method applied to four converter control circuit, comprising:

[0028]判断获取的电压补偿信号是否低于预先设定的低钳电压; [0028] It is determined whether the acquired voltage compensation signal is below a predetermined low voltage clamp;

[0029]若是,发送低电平信号,所述四管变换器控制电路进入休眠模式,并利用占空比信息保持电路保持占空比信息; [0029] If the transmission signal is low, the four converter control circuit enters a sleep mode, and using information holding circuit holding duty ratio duty cycle information;

[0030]否则,发送高电平信号,所述四管变换器控制电路进入正常工作模式。 [0030] Otherwise, the transmission signal is high, the four converter control circuit enters the normal operation mode.

[0031]进一步的,在所述判断获取的电压补偿信号是否低于预先设定的低钳电压之前,还包括: [0031] Further, prior to the determination whether the acquired voltage compensation signal is below the low clamp voltage set in advance, further comprising:

[0032]接收输出电压反馈信号和基准电压信号; [0032] receives the output voltage feedback signal and a reference voltage signal;

[0033]将接收到的所述输出电压反馈信号和基准电压信号进行误差比较和补偿,获取电压补偿信号。 [0033] The received signal of the output voltage feedback signal and the reference voltage and comparing the error compensation, the compensation voltage signal acquisition.

[0034] —种四管变换器,包括权利要求1-7任意一项所述的四管变换器控制电路。 [0034] - four kinds of converters, including four converter 1-7 according to any one of claims control circuit.

[0035]从上述技术方案可以看出,本申请公开的四管变换器控制电路、四管变换器及其轻载控制方法,通过电压补偿电路产生电压补偿信号,电流补偿电路产生电流补偿信号,休眠模式控制电路比较电压补偿信号与预先设定的低钳电压,并根据比较结果指示四管变换器控制电路进入或退出休眠模式。 [0035] As can be seen from the above technical solutions, four inverter control circuit disclosed in the present application, four light load converter and its control method to generate a current compensation signal generation voltage compensation signal, the current through the voltage compensation circuit compensating circuit, the control circuit compares the sleep mode and the low-voltage clamp voltage compensation signal set in advance, and indicates four converter control circuit enters or exits the hibernation mode according to the comparison result. 本方案通过电压补偿信号来控制四管变换器的休眠及开启,实现了直接通过电压补偿信号控制休眠及开启的目的,无需在进入脉冲频率调制模式后,再进行多次判断,避免了增加额外的轻载控制电路,使得电路简单化。 The program is controlled by a voltage compensation signal is turned on and a sleep four converters, to achieve the purpose of opening and direct control by the sleep signal voltage compensation without after entering a pulse frequency modulation mode, then determining a plurality of times, avoids additional the light load control circuit so that the circuit is simplified. 同时,在进入休眠模式时,增加了占空比信息保持电路,以保证电路在退出休眠模式时真空比信号的准确性。 Meanwhile, when entering the sleep mode, the duty cycle information holding circuit increases, in order to ensure the accuracy of the vacuum circuit is in the sleep mode than the exit signal.

附图说明 BRIEF DESCRIPTION

[0036]为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术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发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。 [0036] In order to more clearly illustrate the technical solutions in the embodiments or the prior art embodiment of the present invention, briefly introduced hereinafter, embodiments are described below in the accompanying drawings or described in the prior art needed to be used in describing the embodiments the drawings are only some embodiments of the present invention, those of ordinary skill in the art is concerned, without creative efforts, can derive from these drawings other drawings.

[0037]图1为本发明实施例公开的一种四管变换器控制电路的结构示意图; [0037] FIG. 1 structure diagram of an embodiment of the disclosed four inverter control circuit embodiment of the invention;

[0038]图2为本发明实施例公开的一种电压补偿电路的电路结构示意图; [0038] FIG. 2 is a schematic circuit structure of a voltage compensation circuit according to the disclosed embodiment of the present invention;

[0039]图3为本发明实施例公开的一种电流补偿电路的电流结构示意图; [0039] FIG. 3 current schematic diagram of a configuration example of the current compensation circuit disclosed embodiment of the present invention;

[0040]图4为本发明实施例公开的一种开关控制信号产生电路的电路结构示意图; [0040] FIG. 4 is a schematic circuit structure of an embodiment of a switch control signal generation circuit disclosed embodiment of the invention;

[0041]图5为本发明实施例公开的一种四管变换器控制电路的电路结构示意图; [0041] FIG. 5 is a schematic circuit structure of a four inverter control circuit embodiment disclosed embodiment of the invention;

[0042]图6为本发明实施例公开的一种四管变换器控制电路的电路结构示意图; [0042] FIG. 6 is a schematic circuit structure of a four inverter control circuit embodiment disclosed embodiment of the invention;

[0043]图7为本发明实施例公开的一种四管变换器轻载控制方法的流程图。 [0043] FIG. 7 a flowchart of an embodiment disclosed four light load converter control method according to the present invention.

具体实施方式 detailed description

[0044]下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。 [0044] below in conjunction with the present invention in the accompanying drawings, technical solutions of embodiments of the present invention are clearly and completely described, obviously, the described embodiments are merely part of embodiments of the present invention, but not all embodiments example. 基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。 Based on the embodiments of the present invention, all other embodiments of ordinary skill in the art without any creative effort shall fall within the scope of the present invention.

[0045]本发明公开了一种四管变换器控制电路,其结构示意图如图1所示,包括: [0045] The present invention discloses a four inverter control circuit, a schematic view of the structure shown in Figure 1, comprising:

[0046]电压补偿电路11,与电压补偿电路11相连的休眠模式控制电路12,与电压补偿电路11及占空比信息保持电路15分别相连的电流补偿电路13,与电流补偿电路13相连的开关控制信号产生电路14,与休眠模式控制电路12及电流补偿电路13分别相连的占空比信息保持电路15。 [0046] The voltage compensation circuit 11, and a sleep mode voltage compensation circuit 11 is connected to 12, 13, the current compensation circuit with current compensation circuit 11 and the duty cycle information holding voltage compensation circuit 15 is connected to a switching circuit 13 are respectively connected to the control circuit a control signal generating circuit 14, duty cycle information 13 and 12 are respectively connected to a circuit with current compensation circuit remains dormant mode control circuit 15.

[0047]其中,电压补偿电路11用于接收输出电压反馈信号FB和基准电压信号VREF,并将接收到的输出电压反馈信号FB和基准电压信号Vref进行误差比较和补偿,获取电压补偿信号 [0047] wherein the voltage compensation circuit 11 for receiving an output voltage feedback signal FB and the VREF signal reference voltage, and comparing the error and the compensation of the received signal to the output voltage feedback signal FB and the reference voltage Vref, obtaining a voltage compensation signal

Vcomp ο Vcomp ο

[0048]电压补偿电路11具体可以包括:第一误差放大器及第一补偿电路,其中:第一误差放大器的输出端通过第一补偿电路接地。 [0048] The voltage compensation circuit 11 may include: a first error amplifier and a first compensation circuit, wherein: the output terminal of the first error amplifier through a first compensation circuit ground.

[0049]第一补偿电路具体可以包括第一电阻及第一电容,则电压补偿电路11的电路结构不意图如图2所不,包括:第一误差放大器21,第一电阻Rl,第一电容Cl,其中: [0049] DETAILED first compensation circuit may include a first resistor and a first capacitor, the circuit configuration of the voltage compensation circuit 11 is not shown in FIG 2 is not intended, comprising: a first error amplifier 21, a first resistor Rl, a first capacitor cl, wherein:

[0050] 第一误差放大器21的输出端依次通过第一电阻Rl及第一电容Cl接地。 [0050] The output terminal of the first error amplifier 21 sequentially through the first resistor Rl and the first capacitor Cl to ground.

[005Ί ]第一误差放大器21的正向输入端接收基准电压信号Vref,反向输入端接收输出电压反馈信号FB,将输出电压反馈信号FB和基准电压信号Vref进行误差比较及补偿,得到电压补偿信号VeciMP,并发送。 [005Ί] positive input terminal of the first error amplifier 21 receives a reference voltage signal Vref, an inverting input terminal receiving an output voltage feedback signal FB, the output voltage feedback signal FB and the reference voltage signal Vref and comparing the error compensation, the compensation voltage obtained signal VeciMP, and transmitted.

[0052]其中,图2中所示的电路结构仅是电压补偿电路11的电路结构的一个示例,电压补偿电路11并不局限于图2所示的电路结构,电压补偿电路11可以为其它任何可以实现电压补偿的电路结构。 [0052] wherein, in the circuit configuration shown in FIG. 2 is only one example of a circuit configuration of a voltage compensation circuit 11, the voltage compensation circuit 11 is not limited to the circuit configuration, the voltage compensation circuit shown in FIG. 11 may be any other the circuit configuration can be realized voltage compensation.

[0053]休眠模式控制电路12用于接收电压补偿信号Vccimp,并将电压补偿信号Vccimp与预先设定的低钳电压Vhys进行比较,得到比较结果,该比较结果用于指示进入或退出休眠模式。 [0053] dormant mode control circuit 12 for receiving a voltage signal Vccimp compensation, and the compensation voltage signal and the low clamp voltage Vhys Vccimp set in advance are compared to obtain a comparison result, the comparison result is used to indicate entering or exiting sleep mode.

[0054]优选的,休眠模式控制电路12可以具体为:第一比较器。 [0054] Preferably, the dormant mode control circuit 12 may be embodied as: a first comparator.

[0055]第一比较器的正向输入端与电压补偿电路的输出端相连,接收电压补偿信号Vcomp,第一比较器的反向输入端接收预先设定的低钳电压Vhys,第一比较器的输出端与占空比信息保持电路15相连。 [0055] The positive input terminal and the output terminal voltage compensation circuit is connected to the first comparator receives a voltage compensation signal Vcomp is, the inverting input of the first comparator receives the low clamp voltage Vhys preset first comparator the output of the duty cycle of the information hold circuit 15.

[0056]第一比较器用于比较电压补偿信号Vcqmp及低钳电压VHYS,并输出比较结果至开关控制信号产生电路14,用于使四管变换器控制电路进入或退出休眠模式。 [0056] a first comparator for comparing a voltage compensation signal Vcqmp clamp and the low voltage VHYS, and outputs the comparison result to the switch control signal generation circuit 14, for four converter control circuit enters or exits the hibernation mode.

[0057]电流补偿电路13用于接收电压补偿信号Vccimp及电感电流平均值信号Isense,进行误差比较和补偿,产生电流补偿信号1C.。 [0057] The current compensation circuit 13 for receiving a voltage and a compensation signal Vccimp Isense is the average inductor current signal, and comparing the error compensation, the compensation signal generating current 1C ..

[0058]电流补偿电路13具体可以包括:第二误差放大器及第二补偿电路,其中:第二误差放大器的输出端连接休眠模式控制电路的输出端的同时,通过第二补偿电路接地。 [0058] The current compensation circuit 13 may include: a second error amplifier and a second compensation circuit, wherein: the output terminal of the second error amplifier is connected to a sleep mode while the output of the control circuit, the second compensation circuit ground.

[0059]第二补偿电路具体可以包括:第二电阻、第二电容及第三电容,则电流补偿电路的结构示意图如图3所示,包括:第二误差放大器31,第二电阻R2,第二电容C2,第三电容C3,其中: [0059] The second compensation circuit may include: a second resistor, a second capacitor and a third capacitor, the structure of the current compensation circuit diagram shown in Figure 3, comprises: a second error amplifier 31, a second resistor R2, a first two capacitor C2, a third capacitor C3, wherein:

[0060]第二误差放大器31的输出端连接休眠模式控制电路的输出端的同时,依次通过第二电阻R2及第二电容C2接地,同时第二误差放大器31的输出端通过第三电容C3接地。 While dormant mode control circuit is connected to an output terminal of the output terminal [0060] the second error amplifier 31, passes through second resistor R2 and the second capacitor C2 is grounded, while the output of the second error amplifier 31 is grounded through the third capacitor C3. 第二误差放大器31的输出端同时与休眠模式控制电路的输出端相连,接收休眠控制信号Standby0 End of the second output terminal of the error amplifier 31 simultaneously with the dormant mode control circuit is connected to a sleep control signal Standby0

[0061 ]其中,图3中所示的电路结构仅是电流补偿电路13的电路结构的一个示例,电流补偿电路13并不局限于图3所示的电路结构,电流补偿电路13可以为其它任何可以实现电压补偿的电路结构。 [0061] wherein, in the circuit configuration shown in FIG. 3 is merely one example of the circuit configuration of a current compensation circuit 13, a current compensation circuit 13 is not limited to the circuit configuration, current compensation circuit 13 shown in FIG. 3 may be any other the circuit configuration can be realized voltage compensation.

[0062]第二误差放大器31的正向输入端与电压补偿电路11的输出端连接,接收电压补偿信号VcciMP,第二误差放大器31的反向输入端接收电感电流平均值的信号Isense,进行电压补偿信号Vccimp及电感电流平均值的信号Isense的误差比较和补偿,获取电流补偿信号Iccimp并发送。 Positive input terminal and the output terminal voltage compensation circuit 11. [0062] The second error amplifier 31 is connected to receive a voltage compensation signal VcciMP, a second inverting input of error amplifier 31 receives the average inductor current signal Isense, and the voltage Vccimp compensation signal and the average inductor current signal Isense comparison and error compensation, the compensation signal Iccimp and acquires current transmission.

[0063 ] 15_£是电感电流采样滤波后的直流信号,表示电感电流的大小。 [0063] 15_ £ DC signal sampling filter inductor current, represents the magnitude of the inductor current. 当负载在CCM模式下慢慢减小时,Isense也会随着负载的减小而减小。 When the load gradually decreases in CCM, Isense will decrease as the load decreases. 而整个四管Buck-Boost变换器工作在闭环状态下,所以,电压补偿信号VcciMP与电感电流平均值的信号Isense相等,当输出电流降低时,电压补偿信号Vccimp也会随着电感电流平均值的信号Isense的降低而降低。 The whole four Buck-Boost converter is operating in a closed loop, so that the voltage signal Isense VcciMP compensation signal is equal to the average inductor current, when the output current decreases, the voltage compensation signal Vccimp also with the average inductor current reduce the signal Isense is lowered. 因此,米用电压补偿信号来控制休眠和开启状态。 Thus, a voltage meter compensation signal to control the ON state and the sleep.

[0064]当电压补偿信号Vccimp小于低钳电压Vhys时,休眠控制信号Standby为低电平,进入休眠模式,此时,停止clock和功率管的动作。 [0064] When a voltage compensation signal is less than the low clamp voltage Vhys Vccimp, sleep Standby control signal at a low level, entering a sleep mode, at this time, the operation clock is stopped and the power tube.

[0065]当输出电压反馈信号FB降低到基准电压信号Vref以下时,电压补偿电路11会使电压补偿信号VcciMP高过低钳电压Vhys,此时,休眠模式控制电路12输出的休眠控制信号Standby为高电平,进入正常工作模式,功率管重新开始工作,为输出电容充电,直至输出电压反馈信号FB再次高过基准电压信号Vref,导致电压补偿信号Vccimp再次低于低钳电压Vhys,进入休眠模式。 Sleep control signal [0065] When the output voltage feedback signal FB is lowered to the reference voltage signal Vref, the voltage compensation circuit 11 causes the high voltage compensation signal VcciMP low clamp voltage Vhys, at this time, the sleep mode control circuit 12 outputs to Standby high, into the normal operating mode, the power tube to start operating again, the output capacitor charging until the output voltage feedback signal FB again higher than the reference voltage signal Vref, resulting in a voltage compensation signal Vccimp is again below the low clamp voltage Vhys, entering a sleep mode .

[0066]开关控制信号产生电路14用于接收电流补偿信号IcciMP、锯齿波信号Ramp和时钟信号clock,并根据电流补偿信号IeciMP、锯齿波信号Ramp和时钟信号C lock产生开关控制信号控制功率管的导通状态。 [0066] The switching control signal generating circuit 14 for receiving a current compensation signal IcciMP, Ramp sawtooth wave signal and a clock signal clock, and in accordance with current compensation signal IeciMP, sawtooth signal Ramp C lock clock signal and generates switching control signals to control the power tube conducting state.

[0067]开关控制信号产生电路14的结构示意图如图4所示,包括:第二比较器41,第三比较器42,正向偏置电源43及逻辑电路44。 Structure [0067] switch control signal generation circuit 14 is a schematic diagram shown in Figure 4, comprises: a second comparator 41, third comparator 42, a forward bias power supply 43 and the logic circuit 44.

[0068]其中:第二比较器41的正向输入端通过正向偏置电源43与电流补偿电路的输出端相连,第二比较器41的反向输入端与第三比较器42的反向输入端同时接收锯齿波信号Ramp,第三比较器42的正向输入端与电流补偿电路的输出端相连,逻辑电路44同时与第二比较器41及第三比较器45的输出端相连,同时接收时钟信号clock,逻辑电路44的输出端输出的信号分别为信号Dbuck和信号Dbc1st。 [0068] wherein: the positive input of the second comparator 41 by the forward bias power supply 43 is connected to the output of the current compensation circuit, and the reverse inverting input of the second comparator 41 of the third comparator 42 while receiving the input of the Ramp sawtooth signal, an output terminal connected to the positive input terminal of the current compensation circuit of the third comparator 42, while the logic circuit 44 is connected to the output of the second comparator 41 and the third comparator 45, while receives the clock signal clock, the logic circuit 44 the signal output terminal, respectively, and a signal signal Dbuck Dbc1st.

[0069]占空比信息保持电路15用于保持占空比信号,用于在处于休眠模式时,对占空比信号进行保持,以保证在进入开启模式时电流补偿信号的正确性,以免趋于饱和。 [0069] The duty cycle information holding circuit 15 for holding the duty cycle signal, when in a sleep mode, the duty ratio signal is maintained to ensure the correctness into the ON mode when the current compensation signal in order to avoid becoming to saturation.

[0070]若当前处于轻载状态,且处于休眠模式,当功率管无开关动作时,电感电流为零,所以电感电流平均值的信号Isense为零,但此时电压补偿信号Vccimp低于低钳电压Vhys,电压补偿信号Vcqmp与电感电流平均值的信号Isense不再相等,即在CCM工作时形成的闭环不再成立,所以在休眠模式期间,电流补偿信号Ic.会趋于饱和,不能准确表示对应的占空比信号,当退出休眠模式,进入开启模式时,会以错误的占空比信号工作。 [0070] If the current lower jaw is lightly loaded, and in the sleep mode, when no switching operation of the power transistor, the inductor current is zero, the average inductor current signal Isense zero, but when the voltage is lower than the compensation signal Vccimp voltage Vhys, voltage compensation signal Vcqmp average inductor current signal Isense is no longer equal, i.e. not incorporated in a closed loop formed when the CCM operation, so that during the sleep mode, the compensation signal current Ic. will become saturated and can not accurately represent corresponding duty cycle signal when exiting hibernation, enter on mode that will work in the wrong duty cycle signal. 因此,为了保证在开启模式时,占空比信号的准确性,需要在电流补偿电路及休眠模式控制电路之间增加占空比信息保持电路15。 Accordingly, in order to ensure that the open mode, the accuracy of the duty cycle signal, it is necessary in the current compensation circuit between the circuit and increasing the sleep mode information holding circuit 15 controls the duty cycle.

[0071]本实施例公开的四管变换器控制电路,通过电压补偿电路产生电压补偿信号,电流补偿电路产生电流补偿信号,休眠模式控制电路比较电压补偿信号与预先设定的低钳电压,并根据比较结果指示四管变换器控制电路进入或退出休眠模式。 [0071] Example embodiments of the present disclosure four inverter control circuit generates a current compensation signal generation voltage compensation signal, the current through the voltage compensation circuit compensating circuit, the control circuit compares the sleep mode and the low-voltage clamp voltage compensation signal set in advance, and It indicates four converter control circuit enters or exits the hibernation mode according to the comparison result. 本方案通过电压补偿信号来控制四管变换器的休眠及开启,实现了直接通过电压补偿信号控制休眠及开启的目的,无需在进入频率宽度调制模式后,再进行多次判断,避免了增加额外的轻载控制电路,使得电路简单化。 The program is controlled by a voltage compensation signal is turned on and a sleep four converters, to achieve the object directly controlled by a sleep signal and the compensation voltage is turned on, without entering in the frequency width modulation mode, then determining a plurality of times, avoids additional the light load control circuit so that the circuit is simplified. 同时,在进入休眠模式时,增加了占空比信息保持电路,以保证电路在退出休眠模式时真空比信号的准确性。 Meanwhile, when entering the sleep mode, the duty cycle information holding circuit increases, in order to ensure the accuracy of the vacuum circuit is in the sleep mode than the exit signal.

[0072]进一步的,本实施例公开的四管变换器控制电路中的占空比信息保持电路,可以具体为第一开关Kl,应用第一开关Kl的四管变换器控制电路的结构示意图如图5所示。 [0072] Further, four converter according to the present disclosed embodiment of the control circuit duty cycle information holding circuit, a first switch may be embodied as Kl, Kl structural applications of four first switching converter control circuit schematic as Figure 5.

[0073]第一开关Kl用于在接收到比较结果为低电平时断开,电流补偿信号Icqmp在休眠模式时,由补偿电容放电保持,这样就可以保持住闭环工作时的占空比信息;在接收到比较结果为高电平时第一开关Kl闭合,闭环形成,进入CCM工作模式。 [0073] The first switch Kl comparison result for receiving the low OFF current compensation signal Icqmp in sleep mode, held by the compensation capacitor is discharged, so that the duty cycle information can be maintained living closed loop; upon receiving the high level when the comparison result of the first switch Kl is closed, a closed loop is formed, into the CCM operation.

[0074]具体的,占空比信息保持电路15还可以具体为第二开关K2,第一非门NI,受控电压模块61,应用上述占空比信息保持电路15的四管变换器控制电路的结构示意图如图6所示。 [0074] Specifically, the duty ratio information holding circuit 15 also may be embodied as a second switch K2, the NI first NAND gate, controlled voltage module 61, the duty ratio applied four information holding circuit 15 controls the inverter circuit structure schematically shown in FIG.

[0075]第二开关K2的静触点与电流补偿电路相连,动触点分别与第一非门NI及受控电压模块61相连,第一非门NI的另一端与休眠模式控制电路相连。 Stationary contact and a current compensation circuit [0075] a second switch K2 is connected to the movable contact connected to the first NAND gate and the NI module 61 are controlled voltage, a first NAND gate and the other end of NI dormant mode control circuit.

[0076]当休眠模式控制电路输出的休眠控制信号为低电平时,经过第一非门NI转为高电平,第二开关K2闭合,此时电流补偿信号Icqmp不再由环路决定,而是由受控电压模块61给出;当退出休眠模式时,K2断开,由电流补偿电路决定电流补偿信号Icqmp的电压,闭环工作方式与CCM—致。 [0076] When the sleep control signal dormant mode control circuit is a low level output through the first NAND gate NI goes high, the second switch K2 is closed, when the current is no longer determined by the compensation signal Icqmp loop, and is given by the voltage controlled module 61; when exiting the sleep mode, K2 off, the voltage signal Icqmp current compensation is determined by the current compensation circuit, and a closed loop mode of operation CCM- actuator.

[0077] 其中,受控电压模块61可以具体为受控电压源VForce,受控压源VForce可以由VlN和Vout计算得出。 [0077] wherein the controlled voltage module 61 may be specifically controlled voltage source VForce controlled voltage source can be calculated from the VlN VForce and Vout.

[0078]本实施例公开了一种四管变换器轻载控制方法,应用于四管变换器控制电路,其流程图如图7所示,包括: [0078] The present embodiment discloses a four light-transducer overload control method applied to four converter control circuit, the flow chart shown in Figure 7, comprising:

[0079]步骤S71、判断获取的电压补偿信号Vcqmp是否低于预先设定的低钳电压Vhys; [0079] step S71, the compensation signal is determined Vcqmp acquired voltage is lower than a preset low voltage Vhys clamp;

[0080]步骤S72、若是,发送低电平信号,四管变换器控制电路进入休眠模式,并利用占空比信息保持电路保持占空比信息; [0080] step S72, the if yes, sending a low level signal, four converter control circuit enters a sleep mode, and using information holding circuit holding duty ratio duty cycle information;

[0081]步骤S73、否则,发送高电平信号,四管变换器控制电路进入正常工作模式。 [0081] step S73, the otherwise, sending a high level signal, four converter control circuit enters the normal operation mode.

[0082 ] 15_£是电感电流采样滤波后的直流信号,表示电感电流的大小。 [0082] 15_ £ DC signal sampling filter inductor current, represents the magnitude of the inductor current. 当负载在CCM模式下慢慢减小时,Isense也会随着负载的减小而减小。 When the load gradually decreases in CCM, Isense will decrease as the load decreases. 而整个四管Buck-Boost变换器工作在闭环状态下,所以,电压补偿信号VcciMP与电感电流平均值的信号Isense相等,当输出电流降低时,电压补偿信号Vccimp也会随着电感电流平均值的信号Isense的降低而降低。 The whole four Buck-Boost converter is operating in a closed loop, so that the voltage signal Isense VcciMP compensation signal is equal to the average inductor current, when the output current decreases, the voltage compensation signal Vccimp also with the average inductor current reduce the signal Isense is lowered. 因此,米用电压补偿信号来控制休眠和开启状态。 Thus, a voltage meter compensation signal to control the ON state and the sleep.

[0083]当电压补偿信号Vccimp小于低钳电压Vhys时,休眠控制信号Standby为低电平,进入休眠模式,此时,停止clock和功率管的动作。 [0083] When a voltage compensation signal is less than the low clamp voltage Vhys Vccimp, sleep Standby control signal at a low level, entering a sleep mode, at this time, the operation clock is stopped and the power tube.

[0084]当输出电压反馈信号FB降低到基准电压信号Vref以下时,电压补偿电路11会使电压补偿信号VcciMP高过低钳电压Vhys,此时,休眠模式控制电路12输出的休眠控制信号Standby为尚电平,进入开启模式,功率管重新开始工作,为输出电容充电,直至输出电压反馈信号FB再次高过基准电压信号VREF,电压补偿电路11给电压补偿信号Vcqmp放电,导致电压补偿信号VeciMP再次低于低钳电压Vhys,进入休眠模式。 Sleep control signal [0084] When the output voltage feedback signal FB is lowered to the reference voltage signal Vref, the voltage compensation circuit 11 causes the high voltage compensation signal VcciMP low clamp voltage Vhys, at this time, the sleep mode control circuit 12 outputs to Standby still level, into the ON mode, the power tube to start operating again, the output capacitor is charged until the voltage of the feedback signal FB again higher than the reference voltage signal the VREF, the voltage compensation circuit 11 to a voltage compensation signal Vcqmp discharging output, resulting in a voltage compensation signal VeciMP again lower than the low clamp voltage Vhys, entering a sleep mode.

[0085]本实施例公开的四管变换器轻载控制方法,通过比较电压补偿信号与预先设定的低钳电压,并根据比较结果指示四管变换器控制电路进入或退出休眠模式。 Four converter [0085] Example embodiments of the present disclosure of a light load control method, a compensation signal by comparing the voltage clamp and the low voltage is set in advance, and indicates four converter control circuit enters or exits the hibernation mode according to the comparison result. 本方案通过电压补偿信号来控制四管变换器的休眠及开启,实现了直接通过电压补偿信号控制休眠及开启的目的,无需在进入脉冲频率调制模式后,再进行多次判断,即在CCM模式下,实现断续工作,避免了增加额外的轻载控制电路,使得电路简单化。 The program is controlled by a voltage compensation signal is turned on and a sleep four converters, to achieve the purpose of opening and direct control by the sleep signal voltage compensation without after entering a pulse frequency modulation mode, then determining a plurality of times, i.e., in the CCM mode , the intermittent operation realized, avoids additional light load control circuit so that the circuit is simplified. 同时,在进入休眠模式时,增加了占空比信息保持电路,以保证电路在退出休眠模式时真空比信号的准确性。 Meanwhile, when entering the sleep mode, the duty cycle information holding circuit increases, in order to ensure the accuracy of the vacuum circuit is in the sleep mode than the exit signal.

[0086]进一步的,本实施例公开的四管变换器轻载控制方法中,在步骤S71之前,还包括: [0086] Further, the present embodiment four converter disclosed embodiment the light load control method, before step S71, the further comprising:

[0087 ]步骤S74、接收输出电压反馈信号FB和基准电压信号Vref ; [0087] step S74, the reception output voltage feedback signal FB and the reference voltage signal Vref;

[0088]步骤S75、将接收到的输出电压反馈信号FB和基准电压信号Vref进行误差比较和补偿,获取电压补偿信号VcOMP。 [0088] step S75, the received output voltage feedback signal FB and the reference voltage signal Vref and comparing the error compensation, the compensation signal voltage acquiring VcOMP.

[0089]本实施例公开了一种四管变换器,其可以包括上述任意四管变换器控制电路的具体结构,在此不再赘述。 [0089] The present embodiment discloses a four transducer, which may include any of the above four specific configuration of the converter control circuit, is not repeated herein.

[0090]本说明书中各个实施例采用递进的方式描述,每个实施例重点说明的都是与其他实施例的不同之处,各个实施例之间相同相似部分互相参见即可。 [0090] In the present specification, the various embodiments described in a progressive manner, differences from the embodiment and the other embodiments each of which emphasizes embodiment, the same or similar portions between the various embodiments refer to each other. 对于实施例公开的装置而言,由于其与实施例公开的方法相对应,所以描述的比较简单,相关之处参见方法部分说明即可。 For the disclosed embodiment of the apparatus embodiment, since it corresponds to the method disclosed embodiments, the description is relatively simple, see Methods of the correlation can be described.

[0091]专业人员还可以进一步意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,能够以电子硬件、计算机软件或者二者的结合来实现,为了清楚地说明硬件和软件的可互换性,在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。 [0091] professionals may further appreciate that the various means disclosed herein and algorithm steps described exemplary embodiments, by electronic hardware, computer software, or a combination thereof. In order to clearly illustrate the hardware and software interchangeability, in the above description, according to functions generally described compositions and steps of the examples. 这些功能究竟以硬件还是软件方式来执行,取决于技术方案的特定应用和设计约束条件。 Whether these functions are performed by hardware or software depends upon the particular application and design constraints of the technical solutions. 专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本发明的范围。 Professional technical staff may use different methods for each specific application to implement the described functionality, but such implementation should not be considered outside the scope of the present invention.

[0092]结合本文中所公开的实施例描述的方法或算法的步骤可以直接用硬件、处理器执行的软件模块,或者二者的结合来实施。 [0092] The steps of a method or algorithm described in the embodiments disclosed herein may be implemented in hardware, or a combination thereof, in a software module executed by a processor implemented directly. 软件模块可以置于随机存储器(RAM)、内存、只读存储器(R0M)、电可编程R0M、电可擦除可编程R0M、寄存器、硬盘、可移动磁盘、CD-ROM、或技术领域内所公知的任意其它形式的存储介质中。 A software module may be placed in a random access memory (RAM), a memory, a read only memory (R0M), R0M electrically programmable, electrically erasable programmable R0M, registers, a hard disk, a removable disk, CD-ROM, or within the technical field known any other form of storage medium.

[0093]对所公开的实施例的上述说明,使本领域专业技术人员能够实现或使用本发明。 [0093] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. 对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的,本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下,在其它实施例中实现。 Various modifications to these professionals skilled in the art of the present embodiments will be apparent, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. 因此,本发明将不会被限制于本文所示的这些实施例,而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。 Accordingly, the present invention will not be limited to the embodiments shown herein but is to be accorded herein consistent with the principles and novel features disclosed widest scope.

Claims (9)

  1. 1.一种四管变换器控制电路,其特征在于,包括:电压补偿电路,与所述电压补偿电路相连的休眠模式控制电路,与所述电压补偿电路及休眠模式控制电路分别相连的电流补偿电路,与所述休眠模式控制电路及电流补偿电路分别相连的占空比信息保持电路,与所述电流补偿电路相连的开关控制信号产生电路,其中: 所述电压补偿电路用于接收输出电压反馈信号和基准电压信号,并将接收到的所述输出电压反馈信号和基准电压信号进行误差比较和补偿,获取电压补偿信号; 所述休眠模式控制电路用于接收所述电压补偿信号,并将所述电压补偿信号与预先设定的低钳电压进行比较,得到比较结果,所述比较结果用于指示进入或退出休眠模式; 所述电流补偿电路用于接收所述电压补偿信号及电感电流平均值信号,进行误差比较和补偿,产生电流补偿信号; A four inverter control circuit comprising: a voltage compensation circuit, and a sleep mode voltage compensation circuit coupled to the control circuit, the current compensation circuit are connected to the voltage control compensation circuit and a sleep mode circuit, duty cycle information with the sleep mode control circuit and a current compensation circuit connected to the respective holding circuits, the switching control signal to said current generating circuit is connected to the compensation circuit, wherein: said voltage compensation circuit for receiving the output voltage feedback voltage signal and the reference signal, and to receive the output voltage feedback signal and the reference voltage signal and the comparison error compensation, the compensation voltage signal acquisition; the sleep mode control circuit for receiving the compensation voltage signal and the said compensation signal and the low voltage clamp comparison voltage set in advance to obtain a comparison result, the comparison result is used to indicate entering or exiting sleep mode; the current compensation circuit for receiving the compensation voltage and the average inductor current signal signal, and comparing the error compensation, the compensation signal generating a current; 所述占空比信息保持电路用于在休眠模式下通过保持所述电流补偿信号来保持占空比信息; 所述开关控制信号产生电路用于根据所述电流补偿信号、锯齿波信号和时钟信号产生开关控制信号来控制功率管的导通状态。 The duty cycle information holding circuit for holding in a sleep mode duty cycle information held by the current compensation signal; the switch control signal generating circuit according to the current compensation signal, the sawtooth signal and the clock signal generating conduction control signal to control the switching state of the power tube.
  2. 2.根据权利要求1所述的四管变换器控制电路,其特征在于,所述休眠模式控制电路为:第一比较器, 所述第一比较器用于比较所述电压补偿信号及低钳电压,并输出比较结果,具体为: 当所述电压补偿信号小于低钳电压时,所述第一比较器输出的比较结果为低电平; 当所述电压补偿信号大于低钳电压时,所述第一比较器输出的比较结果为高电平。 The four said converter control circuit of claim 1, wherein the sleep mode control circuit: a first comparator, the first comparator for comparing the compensated signal voltage and a low voltage clamp , and outputs a comparison result, in particular: compensation signal when the voltage is less than the low clamp voltage, a comparison result output from the first comparator is low; compensation signal when the voltage greater than the low voltage clamp, the comparison of the first comparator output is high.
  3. 3.根据权利要求1所述的四管变换器控制电路,其特征在于,所述占空比信息保持电路为第一开关Kl, 所述第一开关Kl用于在接收到所述比较结果为低电平时断开,在接收到所述比较结果为高电平时闭合。 3. The four converter control circuit according to claim 1, wherein said information holding circuit to a first duty cycle of switch Kl, Kl for the first switch upon receiving the comparison result low off is high closed receiving the comparison result.
  4. 4.根据权利要求1所述的四管变换器控制电路,其特征在于,所述占空比信息保持电路包括:第二开关K2,第一非门NI,受控电压模块,其中: 所述第二开关K2的一端与电流补偿电路相连,另一端分别与第一非门NI及受控电压模块相连,所述第一非门的另一端与所述休眠模式控制电路相连; 所述比较结果为低电平时,所述第二开关K2闭合,所述受控电压模块供电;所述比较结果为高电平时,所述第二开关K2断开,所述电压补偿信号接入。 The four said converter control circuit of claim 1, wherein the duty ratio information holding circuit comprises: a second switch K2, the NI first NAND gate, controlled voltage module, wherein: the a second switch K2 and one end of a current compensation circuit connected to the other terminal connected to the first NAND gate and the NI controlled voltage module, the first NAND gate and the other end connected to the sleep mode control circuit; said comparison result is low, the second switch K2 is closed, the voltage controlled power supply module; high level when the comparison result, the second switch K2 is turned off, the voltage compensation signal access.
  5. 5.根据权利要求1所述的四管变换器控制电路,其特征在于,所述电压补偿电路包括:第一误差放大器及第一补偿电路,其中: 所述第一误差放大器的输出端通过第一补偿电路接地。 The four said converter control circuit of claim 1, wherein said voltage compensation circuit comprising: a first error amplifier and a first compensation circuit, wherein: said first output terminal by the first error amplifier a compensation circuit ground.
  6. 6.根据权利要求1所述的四管变换器控制电路,其特征在于,所述电流补偿电路包括:第二误差放大器及第二补偿电路,其中: 所述第二误差放大器的输出端连接所述休眠模式控制电路的输出端的同时,通过第二补偿电路接地。 The four said converter control circuit of claim 1, wherein said current compensation circuit comprises: a second error amplifier and a second compensation circuit, wherein: said second output terminal of the error amplifier is connected to while the output terminal of said dormant mode control circuit ground through a second compensating circuit.
  7. 7.根据权利要求1所述的四管变换器控制电路,其特征在于,所述开关控制信号产生电路包括:第二比较器,第三比较器,正向偏置电源及逻辑电路,其中: 所述第二比较器的正向输入端通过正向偏置电源与所述电流补偿电路的输出端相连,所述第二比较器的反向输入端与所述第三比较器的反向输入端同时接收锯齿波信号,所述第三比较器的正向输入端与所述电流补偿电路的输出端相连,所述逻辑电路同时与所述第二比较器及第三比较器的输出端相连,同时接收时钟信号。 The four said converter control circuit of claim 1, wherein said switching control signal generating circuit comprises: a second comparator, the third comparator, a forward bias power supply and the logic circuit, wherein: the second comparator positive input terminal connected through a forward bias power supply and the current compensation circuit output terminal, an inverting input of the inverting input terminal of the second comparator and the third comparator end while receiving the sawtooth signal, said third comparator positive input terminal and the output terminal of the current compensation circuit connected to the logic circuit simultaneously connected to the output of the second comparator and the third comparator , while receiving clock signals.
  8. 8.—种四管变换器轻载控制方法,应用于四管变换器控制电路,其特征在于,包括: 接收输出电压反馈信号和基准电压信号; 将接收到的所述输出电压反馈信号和基准电压信号进行误差比较和补偿,获取电压补偿信号; 判断获取的电压补偿信号是否低于预先设定的低钳电压; 若是,发送低电平信号,所述四管变换器控制电路进入休眠模式,并利用占空比信息保持电路保持占空比信息,其中,利用占空比信息保持电路保持占空比信息具体为:通过电流补偿电路接收所述电压补偿信号及电感电流平均值信号,进行误差比较和补偿,产生电流补偿信号;所述占空比信息保持电路在休眠模式下通过保持所述电流补偿信号来保持占空比信息; 否则,发送高电平信号,所述四管变换器控制电路进入正常工作模式。 8.- four kinds of light load inverter control method applied to four converter control circuit, characterized in that, comprising: receiving an output voltage feedback signal and a reference voltage signal; received the output voltage feedback signal and the reference comparing the error voltage signal and compensating, acquires the voltage compensation signal; determining whether the acquired voltage compensation signal is lower than a predetermined low voltage clamp; if yes, sending a low level signal, the four converter control circuit enters a sleep mode, and using information holding circuit holding duty ratio duty cycle information, wherein the information holding circuit holding duty ratio using duty information specifically comprises: receiving the compensation voltage signal and the average inductor current signal by the current compensation circuit, the error comparison and compensation, the compensation signal generating a current; duty ratio of the duty ratio information holding circuit to hold information of the current compensation holding signal in the sleep mode; otherwise, sending a high level signal, the inverter control four circuit enters the normal operation mode.
  9. 9.一种四管变换器,其特征在于,包括权利要求1-7任意一项所述的四管变换器控制电路。 A four transducer, characterized in that it comprises four converter 1-7 according to any one of claims control circuit.
CN 201410733488 2014-12-04 2014-12-04 One kind of four converter control circuit, four light load converter and its control method CN104362839B (en)

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Publication number Priority date Publication date Assignee Title
CN101510721A (en) * 2009-03-18 2009-08-19 浙江大学 Single inductance switch DC voltage converter and three mode control method
CN101510729A (en) * 2009-03-30 2009-08-19 浙江大学 DC switch power supply converter with double modes
CN103763830A (en) * 2014-01-22 2014-04-30 杭州茂力半导体技术有限公司 Light-emitting element driving system and drive and control circuit and driving method
US9285812B2 (en) * 2013-02-01 2016-03-15 Allegro Microsystems, Llc Soft start circuits and techniques

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101510721A (en) * 2009-03-18 2009-08-19 浙江大学 Single inductance switch DC voltage converter and three mode control method
CN101510729A (en) * 2009-03-30 2009-08-19 浙江大学 DC switch power supply converter with double modes
US9285812B2 (en) * 2013-02-01 2016-03-15 Allegro Microsystems, Llc Soft start circuits and techniques
CN103763830A (en) * 2014-01-22 2014-04-30 杭州茂力半导体技术有限公司 Light-emitting element driving system and drive and control circuit and driving method

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