CN2840439Y - DC power supply load short-circuit self-restoring circuit - Google Patents

DC power supply load short-circuit self-restoring circuit Download PDF

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Publication number
CN2840439Y
CN2840439Y CN 200520065713 CN200520065713U CN2840439Y CN 2840439 Y CN2840439 Y CN 2840439Y CN 200520065713 CN200520065713 CN 200520065713 CN 200520065713 U CN200520065713 U CN 200520065713U CN 2840439 Y CN2840439 Y CN 2840439Y
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connected
circuit
load
battery protection
end
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CN 200520065713
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Chinese (zh)
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林乐民
刘增宏
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深圳桑达百利电器有限公司
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Abstract

The utility model relates to a DC power supply load short circuit self-restoring circuit which comprises an over-current detection unit (3), a control unit (2) and a controlled switch (5) which are electrically connected orderly, wherein the controlled switch (5) is connected with the positive electrode of a power supply (1) and the corresponding terminal of a load (4). The utility model is characterized in that the utility model also comprises a resistor and a capacitor C4 which are connected in series, one terminal of the utility model is connected with the positive electrode of the power supply through the resistor, and the other terminal is connected with the load through the capacitor C4; one terminal of the capacitor C4 which is connected with the load correspondingly is connected with the control unit. The DC power supply load short circuit self-restoring circuit can detect the instant voltage outputted on one end by the action of manually removing a load short circuit or automatically eliminating a load short circuit by using the electric characteristic of the capacitor, the instant voltage is bigger than that of a charging voltage power supply, and thus a control switch is turned on from a tripping state to realize the load self-starting of a short circuit of a power circuit. The utility model can be widely used in cell protective boards and other products.

Description

一种直流电源负载短路自恢复电路 A DC power supply from the load short-circuit recovery

技术领域 FIELD

本实用新型涉及电源和电源保护,特别涉及直流电源的智能保护电路。 The present invention relates to a power supply and power protection, particularly to a DC power supply circuit intelligent protection.

背景技术 Background technique

目前,通常的电池保护电路,结构如图1所示,由两个场效应晶体管(MOSFET)Q1、Q2和一个控制IC外加一些阻容元件构成,该控制IC可选不同厂家和类型的各种专用电池保护集成IC。 Currently, a conventional battery protection circuit shown in Figure 1, the two field effect transistors (MOSFET) Q1, Q2, and a control IC plus a number of elements constituting the RC, the control IC manufacturers and optionally various types of specific integrated battery protection IC. 所述电池保护集成IC负责监测电池电压,并控制Q1、Q2的栅极,Q1、Q2在电路中起开关作用,分别控制着充电回路与放电回路的导通与关断,其基本工作原理如下:(一)正常工作状态:在正常充、放电时,电路中电池保护集成IC的DSG与CHG脚低电平,场效应晶体管Q1、Q2、Q3都导通。 The integrated battery protection IC monitors the battery voltage, and controls Q1, the gate of Q2, Q1, Q2 acts as a switch in the circuit, control the charging circuit and the discharge circuit is turned on and off, the basic working principle as follows :( a) normal operation: normal charge and discharge, the battery protection circuit DSG and low CHG pin integrated IC, the field effect transistors Q1, Q2, Q3 are turned on. 充电电流从输出/入端BATERY+流入,经场效应晶体管Q1、Q2向电池充电后由输出/入端BATERY-流出。 A charging current output from / inflow into BATERY + terminal, the field effect transistors Q1, Q2 after the charging of the battery by the Input / Output terminal BATERY- outflow. 正常放电时,电流经输出/入端BATERY-及场效应晶体管Q2、Q1流向电池负极,其电流方向与充电电流方向相反。 Normal discharge, current through the output / BATERY- the terminal and the field effect transistor Q2, Q1 to the battery negative electrode, which is opposite to the current direction of the charging current direction. 由于场效应晶体管Q1、Q2的导通电阻Rds很小,此状态下的损耗很小。 Since the field effect transistors Q1, Q2 of resistance Rds small loss is small in this state.

(二)过充电保护:电池在被充电初期为恒流充电,随着充电时间的延长,电池电压亦会上升,在此过程中当电池保护集成IC检测到电池电压达到过充电检测电压(该数值由电池保护集成IC决定)时,则CHG脚由低电压转为高电压,使控制充电的场效应晶体管Q2栅极为关断状态,从而切断充电回路,使充电器无法对电池进行充电起到保护作用。 (B) Overcharge protection: constant current charging to the battery is charged in the beginning, with the extension of the charging time, the battery voltage will rise, in the process when the integrated battery protection IC detects the battery voltage reaches the overcharge detection voltage (the when the determined value of integrated IC) is protected by a battery, the CHG pin from a low voltage to a high voltage to the control gate of the charging field effect transistor Q2 is turned off, thereby cutting off the charging circuit of the charger can not charge the battery functions Protective effects.

(三)过放电保护:过放电保护是在电池电压变低时停止对负载放电。 (Iii) Over-discharge protection: over-discharge protection of the load is stopped when the battery discharge voltage becomes low. 当电池对负载放电时,其电压亦随放电过程而逐渐降低,当电池电压降至过放检测电压以下时,其容量已经完全放光,如果电池继续放电,则会造成电池的永久性损坏。 Gradually decreases when the battery discharges into the load, the voltage tandem discharge process, when the battery voltage falls below the overdischarge detection voltage, its capacity has been completely shine, if the battery continues to discharge, will cause permanent damage to the battery. 所以当电池保护集成IC检测到电池电压低于过放点检测电压时,其DSG脚由低电压转为高电压,使场效应晶体管Q1由导通转为关断从而切断放电回路,起到保护电池的作用。 When the integrated battery protection IC detects the battery voltage is lower than the overdischarge detection voltage which DSG pin into a high voltage from a low voltage, field effect transistor Q1 is turned off from ON to cut off the discharge circuit, protect the role of the battery.

(四)过电流保护及短路保护:过电流保护是在消耗大电流时停止对负载的放电,此功能的目的在于保护电池及场效应晶体管MOSFET,确保电池在工作状态下的安全性。 (D) short-circuit protection and overcurrent protection: overcurrent protection is to stop the discharge of the load, the purpose of this function is to protect the battery and the MOSFET field-effect transistor, to ensure battery safety in the operating state at the time of large current consumption. 在正常放电过程时,电流经过场效应晶体管Q1、Q2因为导通阻抗会在其两端产生压降,此时若负载因某种原因导致异常使回路电流增大,当电流猛增使得电压亦增加到电池保护集成IC决定的电压值时,电池保护集成IC的DSG脚迅速由低电压转为高电压使场效应晶体管Q1关断从而切断放电回路,回路电流变为零。 In the normal course of discharge, the current through the field effect transistors Q1, Q2 is turned on since the impedance voltage drop is generated at both ends thereof, at this time if the load for some reason, so that an abnormal circuit current increases, so that the voltage when the current surge is also protection is increased when the battery voltage value determined by integrated IC, integrated battery protection IC DSG feet quickly from a low voltage to a high voltage field effect transistor Q1 is turned off so as to cut off the discharge circuit, the circuit current becomes zero. 同理,当负载短路时回路电流猛增,而电压增加到电池保护集成IC决定的电压值时,场效应晶体管Q1会由导通转为关断,避免对电路中电池保护集成IC及场效应晶体管MOSFET的永久性损坏。 Similarly, when the load short circuit current surge, the voltage increases when the battery protection IC integrated voltage value determined by the field effect transistor Q1 is turned on will be turned off to avoid battery protection integrated circuit IC and FET permanent damage to the MOSFET transistor.

该电池保护电路输出/入端短路时,致使电池保护集成IC的DSG脚变高电压使场效应晶体管Q1关断,电路不能再向电池充放电;输出/入端不再短路后,该保护电路无法检测、不能主动使Q1导通,而需要人工复位或断电重启使电池保护集成IC重新工作导通Q1。 When the output of the battery protection circuit / short-circuit the terminal, causing the battery protection IC DSG pin becomes integrated high voltage to the field effect transistor Q1 is turned off, the battery can no longer charge-discharge circuit; Input / output terminal is no longer short circuited, the protective circuit can not be detected, so that Q1 is not active, requires manual reset or power restart of the battery protection IC integrated reactivated turned Q1.

实用新型内容本实用新型需要解决的技术问题是,如何在目前电池保护电路的短路关断电路的基础上使它还可以智能检测短路恢复情况,并根据负载不再短路的情况自动导通电源电路。 SUMMARY The present invention technical problem to be solved is how to make a short-circuit can also detect a smart recovery on the basis of the short-circuit current shutdown circuit of a battery protection circuit, the power circuit is turned and automatically adjusted to the load is no longer short-circuited .

本实用新型上述技术问题这样解决,提供一种直流电源负载短路自恢复电路,包括依次电连接的过流检测单元、控制单元以及连接电源正极和负载对应端的受控开关,其特征在于,还包括串联的电阻和电容C4,其一端通过所述电阻与电源正极连接,另一端通过所述电容C4与负载连接;所述电容C4对应与负载连接一端的另一端与所述控制单元连接。 The present invention solved the above problems, there is provided a DC power supply from the load short-circuit recovery circuit, comprising overcurrent detecting means in turn is electrically connected to the control unit and connected to the positive power supply controlled switches and the corresponding end of the load, characterized by further comprising a series resistor and capacitor C4, through the resistor having one end connected to the positive supply, via the capacitor C4 and the other end connected to a load; corresponding to the capacitor C4 is connected at one end to the other end of the load is connected with the control unit.

按照本实用新型提供的自恢复电路,所述受控开关包括但不限制于场效应晶体管和继电器开关。 According to the present invention provides a self-recovery circuit of the controlled switch, including but not limited to a field effect transistor and a relay switch.

按照本实用新型提供的自恢复电路,所述电阻包括但不限制复合电阻R4和R5。 According to the present invention provides a self-recovery circuit, including without limitation the composite resistor R4 and resistor R5.

按照本实用新型提供的自恢复电路,该自恢复电路是电池保护板/电池保护电路的一部分,该电池保护板/电池保护电路包括电池保护集成IC,所述受控开关是串联的场效应晶体管Q1和Q2,所述控制单元和过流检测单元内置于所述电池保护集成IC中,场效应晶体管Q1的受控端与所述电池保护集成IC连接,还包括:二极管D2,该二极管D2与所述电阻并联,其阳极连接电源正极;场效应晶体管Q3,场效应晶体管Q2的受控端通过场效应晶体管Q3与所述电池保护集成IC连接,场效应晶体管Q3与电源正极连接;场效应晶体管Q4,一端连接在场效应晶体管Q1和Q2之间,另一端通过电阻R7连接所述电容C4对应与负载连接一端的另一端,其受控端通过电阻R8与所述电池保护集成IC连接。 According to the present invention provides a self-recovery circuit, the self-recovery circuit is part of the battery protection board / battery protection circuit, the battery protection board / battery protection circuit includes a battery protection integrated IC, the controlled switch is a field effect transistor connected in series Q1 and Q2, the control unit and the overcurrent detecting means built in the integrated battery protection IC, the controlled terminal of the field effect transistor Q1 is integrated with the battery protection IC is connected, further comprising: a diode D2, the diode D2 parallel to the resistor, and an anode connected positive power; MOSFET Q3 controlled terminal, the field effect transistor Q2 is connected through integrated IC MOSFET Q3 with the battery protection, field-effect transistor Q3 is connected to the positive supply voltage; a field effect transistor Q4, is connected between one end of the field effect transistors Q1 and Q2, and the other end connected to the capacitor C4 via the resistor R7 is connected at one end corresponding to the other end of the load, a control terminal connected through a resistor R8 integrated IC and the battery protection.

按照本实用新型提供的自恢复电路,该自恢复电路可应用在包括但不限制于电池保护电路的范围。 According to the present invention provides a self-recovery circuit, the self-healing include, but are not limited to a battery protection circuit can be used in range of the circuit.

本实用新型提供的直流电源负载短路自恢复电路,利用电容电气特性检测人工去除或自动消失负载短路的动作在一端输出较其充电电压电源更高的瞬间电压,进而带动控制单元控制开关由关断变成导通,实现电源电路短路带载自启动;该电路可广泛利用在电池保护板及其他相关产品上。 Load short-circuit the DC power supply of the present invention provides a self-recovery circuit, the electrical characteristics detected by capacitive removed manually or automatically disappear in a short circuit load operation compared with the output end of the charging voltage of the power supply voltage is higher moments, thereby bringing the control unit controls the switch turned off by the turned on, to realize short-circuit the power supply circuit starting from the carrier tape; extensive use of the circuit to the battery protection board and other related products.

附图说明 BRIEF DESCRIPTION

下面结合附图和具体实施例进一步对本实用新型进行详细说明。 Further detail below with the accompanying drawings and specific embodiments of the present invention is carried out.

图1是目前通常的电池保护电路的原理示意图。 FIG 1 is a schematic view of the principle of a conventional battery protection circuit.

图2是本实用新型提供的直流电源负载短路自恢复电路的原理框图。 FIG 2 is a block diagram of a DC power supply load short-circuit of the present invention provides a self-recovery circuit.

图3是与图1对应的电池保护电路原理示意图。 FIG 3 is a schematic view of the principle of a battery protection circuit 1 corresponding to FIG.

具体实施方式 Detailed ways

首先,说明本实用新型的基础:直流电源负载短路自恢复电路,其具体结构如图2,包括电源1、控制单元2、过流检测单元3和负载4,还包括电容C4以及电阻R4和R5,其工作状态如下:(一)场效应晶体管Q1正常导通,电容C4两端电压基本一致,电容C4不充电。 First, the novel basis of the present utility: a DC power supply from the load short-circuit recovery circuit specific configuration shown in Figure 2, includes a power supply 1, the control unit 2, the overcurrent detecting unit 3 and the load 4, further comprising a capacitor C4 and resistors R4 and R5 , its working state as follows :( a) normal field effect transistor Q1 is turned on, the voltage across capacitor C4 is substantially uniform, the capacitor C4 is not charged.

(二)负载短路,过流检测单元3检测到电流过大转送信号给控制单元2,控制单元2根据关断该信号场效应晶体管Q1;此时,电容C4一端仍与电源连接,而与电源输出对应的另一端等效接地,电容C4充电。 (B) short circuit load, over-current detecting unit 3 detects the excessive current signal is transferred to the control unit 2, the control unit 2 according to the signal field effect transistor Q1 is turned off; this case, one end of the capacitor C4 is still connected to the power supply, and a power supply the other end of the output corresponding to an equivalent grounding capacitor C4 is charged.

(三)去除短路,电容C4放电,产生瞬间高压,控制单元2根据该瞬间高压信号恢复导通场效应晶体管Q1,电路恢复工作。 (Iii) removing the short-circuit, capacitor C4 discharges, high-voltage transient is generated, the control unit 2 based on the instantaneous high signal restoration turned field effect transistors Q1, recovery circuit.

进一步,说明本实用新型具短路带载自启动的电池保护板/电池保护电路,结构如图3所示,该电路在通常电池保护电路的基础上,还包括二极管D2、电阻R4、电阻R5、电容C4以及场效应晶体管Q3、Q4和电阻R7、R8,在该实施例中,其电池保护集成IC可采用不同公司的同类产品。 Further, the present invention is described with short circuit protection board from the starting battery / battery protection circuit with the carrier, the structure shown in Figure 3, the circuit is usually based on a battery protection circuit further includes a diode D2, a resistor R4, a resistor R5, capacitor C4 and the field-effect transistors Q3, Q4 and resistors R7, R8, in this embodiment, integrated battery protection IC which employed similar products of different companies.

(一)这部分新增电路的连接关系如下:二极管D2负极的连接电阻R4的一端、电容C3的一端,二极管D2的正极与电阻R5的一端、电容C4的一端及电阻R7的一端相连接,电阻R4的另一端与电阻R5的另一端相连接,电容C4的另一端与输入端BATTERY+、电容C3的另一端、场效应晶体管Q2的源极及电阻R6的一端相连接,电阻R7的另一端与电池保护集成IC的CSH脚、场效应晶体管Q4的源极相连接,场效应晶体管Q4的漏极与场效应晶体管Q1的源极、Q2的漏极相连接,场效应晶体管Q4的栅极与电阻R8的一端相连接,电阻R8的另一端连接电池保护集成IC的DSG脚、场效应晶体管Q1的栅极。 Connection relationship (a) that part of the new circuit is as follows: One end of the anode end of the diode D2 is connected to resistor R4, one end of the capacitor C3, the resistor R5 and the end of the cathode of the diode D2, one end of the capacitor C4 and the resistor R7 is connected, the other end of the resistor R4 to the other end of the resistor R5 is connected to the other end of the input capacitor C4 BATTERY +, another end of the capacitor C3, the source of the field effect transistor Q2 and the resistor R6 is connected to the other end of the resistor R7 CSH foot and battery protection integrated IC, the source of the field effect transistor Q4 is connected to the drain of the field effect transistor Q1 is a field effect transistor Q4, Q2 is connected to the drain, and the gate of the field effect transistor Q4 One end of the resistor R8 is connected to the other end of the resistor R8 is connected to the battery protection IC integrated DSG foot, and a gate of the field effect transistor Q1.

(二)本实用新型电池保护板/电池保护电路短路带载启动的基本工作原理:电池保护板在正常工作时,电池保护集成IC的CHG、DSG脚为低电压,场效应晶体管Q1、Q2、Q3导通;当输出/入端BATTERY+和输出/入端BATTERY-之间短路时,回路电流猛增使得电池保护集成IC的DSG脚迅速由低电压转为高电压,因而场效应晶体管Q1关断从而切断放电回路,回路电流变为零。 The basic principle (II) of the present invention, the battery protection board / battery protection short circuit load start: the battery protection board during the normal operation, the battery protection IC integrated CHG, the DSG pin to a low voltage, the field effect transistor Q1, Q2, Q3 is turned on; when the inputs / outputs and the output terminal bATTERY + / BATTERY- short between the end loop current surge so that the battery protection IC DSG feet integrated quickly from a low voltage to a high voltage, and thus the field effect transistor Q1 is turned off thereby cut off the discharge circuit, the circuit current becomes zero. 此时场效应晶体管Q4栅极为高电平,场效应晶体管Q4关断,电容C4通过电阻R4、R5被充电,电容C4与二极管D2电连接的脚,其电压提升为电池电压;在去掉短路动作的瞬间,电容C4与二极管D2电连接的脚,其电压在瞬间被提升至大于电池电压,导致二极管D2导通,从而使电池保护集成IC重新动作,电池保护电路恢复正常工作,因而实现了电路短路过后能自行带载启动的功能。 At this time, the gate of the field effect transistor Q4 is high, the field effect transistor Q4 is turned off, capacitor C4 via the resistor R4, R5 is charged, the diode D2 and capacitor C4 is electrically connected to the foot, which is the voltage boosting a battery voltage; removing the short-circuiting operation in moment, capacitor C4 and diode D2 is electrically pin connector, the voltage is raised in a moment greater than the battery voltage, causing the diode D2 is turned on so that the battery protection integrated IC re-operation of the battery protection circuit to resume normal operation, thereby realizing a circuit after the short circuit can be self-load start function.

Claims (5)

1.一种直流电源负载短路自恢复电路,包括依次电连接的过流检测单元(3)、控制单元(2)以及连接电源(1)正极和负载(4)对应端的受控开关(5),其特征在于,还包括串联的电阻和电容C4,其一端通过所述电阻与电源正极连接,另一端通过所述电容C4与负载连接;所述电容C4对应与负载连接一端的另一端与所述控制单元连接。 A load short-circuit from the DC power recovery circuit, comprising overcurrent detecting means (3) are sequentially electrically connected to the control unit (2) and a controlled switch connected to the power supply (1) the positive electrode and the load (4) corresponding to the end (5) characterized in that, further comprising a capacitor C4 and a resistor connected in series, one end of the positive supply voltage via the resistor and the other end by the capacitor C4 is connected to the load; the other terminal of the capacitor C4 is connected to a load corresponding to the end of the said control unit is connected.
2.根据权利要求1所述自恢复电路,其特征在于,所述受控开关是场效应晶体管Q1。 2. The self-recovery circuit according to claim 1, characterized in that the controlled switch is a field effect transistor Q1.
3.根据权利要求1所述自恢复电路,其特征在于,所述受控开关是继电器开关。 3. The self-recovery circuit according to claim 1, characterized in that the controlled switch is a relay switch.
4.根据权利要求1所述自恢复电路,其特征在于,所述电阻是复合电阻R4和R5。 4. The self-recovery circuit as claimed in claim 1, wherein said resistor is a composite resistors R4 and R5.
5.根据权利要求1所述自恢复电路,其特征在于,该自恢复电路是电池保护板/电池保护电路的一部分,该电池保护板/电池保护电路包括电池保护集成IC,所述受控开关是串联的场效应晶体管Q1和Q2,所述控制单元和过流检测单元内置于所述电池保护集成IC中,场效应晶体管Q1的受控端与所述电池保护集成IC连接,还包括:二极管D2,该二极管D2与所述电阻并联,其阳极连接电源正极;场效应晶体管Q3,场效应晶体管Q2的受控端通过场效应晶体管Q3与所述电池保护集成IC连接,场效应晶体管Q3与电源正极连接;场效应晶体管Q4,一端连接在场效应晶体管Q1和Q2之间,另一端通过电阻R7连接所述电容C4对应与负载连接一端的另一端,其受控端通过电阻R8与所述电池保护集成IC连接。 According to claim 1 from the recovery circuit, wherein the self-recovery circuit is part of the battery protection board / battery protection circuit, the battery protection board / battery protection circuit includes a battery protection integrated IC, the controlled switch are connected in series and the field effect transistors Q1 Q2, the control unit and the overcurrent detecting means built in the integrated battery protection IC, the controlled terminal of the field effect transistor Q1 is integrated with the battery protection IC is connected, further comprising: a diode D2, the diode D2 is connected in parallel with the resistor, and an anode connected positive power; MOSFET Q3, Q2 is controlled by the end of the field effect transistor FET Q3 is connected to the battery protection integrated IC, the field effect transistor Q3 and the power supply positive connection; field effect transistors Q4, connected between one end of the field effect transistors Q1 and Q2, and the other end connected to the other end of the capacitor C4 is connected to one end corresponding to the load through a resistor R7, a control terminal through a resistor R8 and the battery protection integrated IC connector.
CN 200520065713 2005-10-13 2005-10-13 DC power supply load short-circuit self-restoring circuit CN2840439Y (en)

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Cited By (8)

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CN101924363A (en) * 2010-08-31 2010-12-22 深圳拓邦股份有限公司 Protection circuit for preventing misoperations and solar power generation system applying same
CN101944715A (en) * 2010-08-31 2011-01-12 深圳拓邦股份有限公司 Load short-circuit protection circuit
CN101986492A (en) * 2010-11-08 2011-03-16 中兴通讯股份有限公司 Short-circuit protection circuit and short-circuit protection method
CN102136181A (en) * 2010-01-25 2011-07-27 能美防灾株式会社 Short-circuit isolator
CN102646960A (en) * 2011-02-22 2012-08-22 北京科易动力科技有限公司 Battery pack primary loop interface protection circuit and protection method
CN102790374A (en) * 2011-12-19 2012-11-21 洛阳理工学院 Short circuit protection circuit
CN103022963A (en) * 2012-12-04 2013-04-03 北京经纬恒润科技有限公司 High-end over-current protection circuit
CN103094932A (en) * 2011-10-28 2013-05-08 东莞钜威新能源有限公司 Power supply system and power protection circuit thereof

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US8675324B2 (en) 2010-01-25 2014-03-18 Nohmi Bosai Ltd. Short-circuit isolator
CN102136181A (en) * 2010-01-25 2011-07-27 能美防灾株式会社 Short-circuit isolator
CN102136181B (en) * 2010-01-25 2013-12-04 能美防灾株式会社 Short-circuit isolator
CN101944715B (en) 2010-08-31 2013-01-30 深圳拓邦股份有限公司 Load short-circuit protection circuit
CN101944715A (en) * 2010-08-31 2011-01-12 深圳拓邦股份有限公司 Load short-circuit protection circuit
CN101924363B (en) * 2010-08-31 2013-04-10 深圳拓邦股份有限公司 Protection circuit for preventing misoperations and solar power generation system applying same
CN101924363A (en) * 2010-08-31 2010-12-22 深圳拓邦股份有限公司 Protection circuit for preventing misoperations and solar power generation system applying same
CN101986492B (en) * 2010-11-08 2015-01-28 中兴通讯股份有限公司 Short-circuit protection circuit and short-circuit protection method
CN101986492A (en) * 2010-11-08 2011-03-16 中兴通讯股份有限公司 Short-circuit protection circuit and short-circuit protection method
CN102646960B (en) * 2011-02-22 2016-10-05 北京科易动力科技有限公司 A kind of battery major loop interface protection circuit and guard method
CN102646960A (en) * 2011-02-22 2012-08-22 北京科易动力科技有限公司 Battery pack primary loop interface protection circuit and protection method
CN103094932B (en) * 2011-10-28 2015-10-21 东莞钜威新能源有限公司 A kind of electric power system and power protecting circuit thereof
CN103094932A (en) * 2011-10-28 2013-05-08 东莞钜威新能源有限公司 Power supply system and power protection circuit thereof
CN102790374A (en) * 2011-12-19 2012-11-21 洛阳理工学院 Short circuit protection circuit
CN103022963B (en) * 2012-12-04 2015-01-21 北京经纬恒润科技有限公司 High-end over-current protection circuit
CN103022963A (en) * 2012-12-04 2013-04-03 北京经纬恒润科技有限公司 High-end over-current protection circuit

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