WO2016184026A1 - Circuit de démarrage lent de boucle d'alimentation électrique pour décharger de l'électricité - Google Patents

Circuit de démarrage lent de boucle d'alimentation électrique pour décharger de l'électricité Download PDF

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Publication number
WO2016184026A1
WO2016184026A1 PCT/CN2015/092219 CN2015092219W WO2016184026A1 WO 2016184026 A1 WO2016184026 A1 WO 2016184026A1 CN 2015092219 W CN2015092219 W CN 2015092219W WO 2016184026 A1 WO2016184026 A1 WO 2016184026A1
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Prior art keywords
circuit
mos transistor
capacitor
diode
terminal
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PCT/CN2015/092219
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English (en)
Chinese (zh)
Inventor
韩冲
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中兴通讯股份有限公司
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Publication of WO2016184026A1 publication Critical patent/WO2016184026A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current

Definitions

  • the present invention relates to the field of circuits, and in particular to a circuit for slowly starting discharge of a power supply loop.
  • FIG. 1 is a schematic diagram of a slow-start hot-swap power supply circuit in the related art
  • FIG. 2 is a waveform diagram of an input voltage and a gate voltage of a main-circuit MOS transistor in the related art in the case of power-down, according to FIG. 1 and FIG.
  • the gate voltage of the main loop MOS transistor VT1 cannot be quickly lowered to zero. Especially in the latter half of the discharge, the discharge is too slow, so that VT1 can not be turned off immediately, and then the power will be generated immediately, which will generate a large inrush current, affecting the main circuit MOS tube VT1, insurance FU1 and the pre-stage power supply line, and the circuit is reliable.
  • the reduction in sex, the limitation of VT1 selection is also large, and the cost is high.
  • the main object of the embodiments of the present invention is to provide a circuit for slowly starting the discharge of the power supply circuit, so as to at least solve the problem that the main circuit MOS tube discharges slowly in the slow start circuit of the related art.
  • a circuit for slowly starting a power supply circuit discharge comprising: a charging circuit, a discharging circuit, and a switching circuit configured to be slowly activated, the charging circuit and the discharging The circuit is connected to the switch circuit, and the discharge circuit is connected to the switch circuit; the charging circuit is configured to supply power to the slow start power supply loop; when the power is off or hot swapped, the discharge circuit is set to be opposite The switching circuit is discharged.
  • the charging circuit includes: a first diode and a first capacitor
  • the discharging circuit includes: a second diode, a second capacitor, a switching transistor, a first MOS transistor, and a first resistor
  • the switching circuit includes: a second MOS transistor of the main circuit; the first terminal A is connected to the gate of the second MOS transistor, and the B terminal of the first capacitor is connected to the source of the second MOS transistor;
  • the first diode A is connected to the second terminal of the first capacitor and the second MOS transistor, and the B terminal of the first diode is connected to an external power source and is the first capacitor.
  • the B terminal of the second diode is connected to a power source, and the A terminal of the second diode is respectively connected to the A terminal of the second capacitor and the emitter of the switching transistor Connecting, a base of the switching transistor is connected to an A terminal of the first diode, a collector of the switching transistor is connected to a gate of the first MOS transistor, and a source of the first MOS transistor Connected to a B terminal of the second capacitor and a source of the second MOS transistor, respectively, a drain of the first MOS transistor and the first diode A end and the second MOS transistor a gate connection; the first resistor is connected in parallel with the first capacitor, and is configured to discharge the first capacitor when power is off or hot swap.
  • the discharge circuit further includes: a second resistor; the second resistor is disposed between the second capacitor and the switch transistor, and is configured to adjust a discharge time of the power supply loop.
  • the discharge circuit further includes: a third resistor; the third resistor is disposed between a drain of the first MOS transistor and a base of the switch transistor, and is disposed to the first MOS The tube is restricted.
  • the charging circuit further includes a voltage dividing circuit, and the voltage dividing circuit is configured to perform voltage division protection on the power supply circuit.
  • the voltage dividing circuit includes: a fourth resistor and a fifth resistor; one end of the fourth resistor is connected to the power source, and the other end is connected to the B end of the first diode and the second diode Connected to the B terminal; one end of the fifth resistor is connected to the B end of the first diode and the B end of the second diode, and the other end is connected to the B end of the second capacitor, the first MOS The tube is connected to a source of the second MOS transistor.
  • the circuit further includes a protection circuit, one end is connected to the power source, and the other end is respectively connected to the discharge circuit and the charging circuit, and is configured to perform voltage regulation protection on the power supply circuit.
  • the protection circuit is composed of a voltage stabilizing tube; one end of the voltage stabilizing tube is connected to a common end of the fourth and the fifth resistors, and the other end is connected to a B end of the second capacitor, The first MOS transistor and the source of the second MOS transistor are connected.
  • the first capacitor and the second capacitor are of the same capacity level.
  • the switching transistor is a PNP switching transistor.
  • a discharge circuit is disposed in the circuit of the slow start power supply circuit, and the discharge circuit is configured to discharge the switch circuit during power failure or hot plugging, and solves the related art in the related art.
  • the main circuit MOS tube in the circuit discharges slowly.
  • FIG. 1 is a schematic diagram of a slow start hot plug power supply circuit in the related art
  • FIG. 2 is a waveform diagram of an input voltage and a gate voltage of a main circuit MOS transistor when power is off in the related art
  • FIG. 3 is a structural block diagram of a circuit for slowly starting a power supply circuit discharge according to an embodiment of the present invention
  • FIG. 4 is a circuit diagram 1 for slowly starting a power supply circuit discharge according to an embodiment of the present invention
  • FIG. 5 is a block diagram showing an optional structure of a circuit for slowly starting a power supply circuit discharge according to an embodiment of the present invention
  • FIG. 6 is a circuit diagram 2 for slowly starting a power supply circuit discharge according to an embodiment of the present invention
  • FIG. 7 is a block diagram 2 of an alternative structure of a circuit for slowly starting a power supply circuit discharge according to an embodiment of the present invention
  • FIG. 8 is a circuit diagram 3 for slowly starting a power supply circuit discharge according to an embodiment of the present invention.
  • FIG. 9 is a first schematic diagram of a DC power slow-start circuit according to an alternative embodiment of the present invention.
  • FIG. 10 is a second schematic diagram of a DC power slow-start circuit according to an alternative embodiment of the present invention.
  • FIG. 11 is a schematic diagram showing the input voltage and the gate voltage waveform of the main loop MOS transistor when the slow start circuit is powered down according to an alternative embodiment of the present invention.
  • FIG. 3 is a structural block diagram of a circuit for slowly starting the discharge of the power supply circuit according to an embodiment of the present invention.
  • the circuit includes: a charging circuit 32, a discharging circuit 34, and a switching circuit 36 provided as a slow start, the charging circuit 32 is connected to the discharging circuit 34 and the switching circuit 36, and the discharging circuit 34 is connected to the switching circuit 36;
  • the charging circuit 32 is configured to supply power to the slow start power supply circuit
  • the discharge circuit 34 is arranged to discharge the switch circuit 36 during power down or hot swap.
  • a discharge circuit is disposed in the circuit of the slow start power supply circuit, and the discharge circuit is used for discharging the switch circuit during power failure or hot plugging, and solves the related art in the slow start circuit in the related art.
  • the main loop MOS tube discharges slowly.
  • the charging circuit 32 includes a first diode D1 and a first capacitor C2, and the discharge circuit 34 includes: Diode D2 a second capacitor C1, a switching transistor VT1, a first MOS transistor VT2, and a first resistor R5; the switching circuit 36 includes: a main loop second MOS transistor VT3;
  • the A terminal of the first capacitor C2 is connected to the gate of the second MOS transistor VT3, and the B terminal of the C2 of the first capacitor is connected to the source of the second MOS transistor VT3, and the A terminal of the first diode D1 and the first capacitor respectively
  • the A terminal of the C2 is connected to the gate of the second MOS transistor VT3, and the B terminal of the first diode D1 is connected to the external power supply and supplies power to the first capacitor C2 and the second MOS transistor VT3;
  • the B terminal of the second diode D2 is connected to the power source, and the A terminal of the second diode D2 is respectively connected to the A terminal of the second capacitor C1 and the emitter of the switching transistor VT1, and the base of the switching transistor VT1 is first and second.
  • the A terminal of the diode D1 is connected, the collector of the switching transistor VT1 is connected to the gate of the first MOS transistor VT2, and the sources of the first MOS transistor VT2 are respectively connected to the B terminal of the second capacitor C1 and the source of the second MOS transistor VT3.
  • a pole connection, a drain of the first MOS transistor VT2 is respectively connected to an A terminal of the first diode D1 and a gate of the second MOS transistor VT3;
  • the first resistor R5 is connected in parallel with the first capacitor C2 and is arranged to discharge the first capacitor when power is off or hot swap.
  • the discharge circuit further includes: a second resistor; wherein the second resistor is disposed between the second capacitor switch transistor and configured to adjust a discharge time of the power supply loop.
  • the discharge circuit further includes: a third resistor; the third resistor is disposed between the drain of the first MOS transistor and the base of the switch transistor, and is configured to limit the current MOSFET.
  • the charging circuit 32 further includes a voltage dividing circuit 38, and the voltage dividing circuit 38 is set to a power supply circuit. Perform partial pressure protection.
  • the voltage dividing circuit 38 includes: a fourth resistor R1 and a fifth resistor R2;
  • One end of the fourth resistor R1 is connected to the power source, and the other end is connected to the B end of the first diode D1 and the B end of the second diode D2;
  • One end of the fifth resistor R2 is connected to the B terminal of the first diode D1 and the B terminal of the second diode D2, and the other end is connected to the B terminal of the second capacitor C1, the first MOS transistor VT2 and the second MOS transistor VT3.
  • the source is connected.
  • FIG. 7 is a block diagram showing an optional structure of a circuit for slowly starting a power supply circuit discharge according to an embodiment of the present invention.
  • the circuit further includes a protection circuit 40, one end is connected to the power source, and the other end is connected to the charging circuit 32.
  • the discharge circuits 34 are respectively connected and arranged to regulate the power supply circuit.
  • FIG. 8 is a circuit diagram 3 for slowly starting the discharge of the power supply circuit according to an embodiment of the present invention, as shown in FIG.
  • the protection circuit is composed of a Zener diode VD1; one end of the Zener diode is connected to the common end of the fourth and fifth resistors, and the other end is connected to the B terminal of the second capacitor, the source of the first MOS transistor and the second MOS transistor.
  • the first capacitor and the second capacitor are of the same capacity level
  • the switching transistor is a PNP switch transistor.
  • the optional embodiment provides a circuit for accelerating the gate discharge of the main circuit MOS transistor in the slow start circuit, and the circuit includes: a charging circuit, a fast discharging circuit, a protection circuit and a switching circuit.
  • the main loop MOS tube is located in the switch circuit, and the fast discharge circuit quickly discharges the gate voltage of the main loop MOS tube when the input is powered down.
  • FIG. 9 is a first schematic diagram of a DC power supply slow start circuit according to an alternative embodiment of the present invention
  • FIG. 10 is a second schematic diagram of a DC power supply slow start circuit according to an alternative embodiment of the present invention.
  • the optional embodiment further includes:
  • the power-on charging circuit is composed of a voltage dividing resistor R1, R2, a charging diode D1, and a gate capacitor C2, and the charging diode D2 charges the capacitor C1;
  • Shutdown detection and fast discharge circuit consists of capacitors C1, R3, PNP switch transistors VT1, R4, discharge MOS tube VT2, discharge resistor R5.
  • Protection circuit consists of voltage regulator tube VD1.
  • the circuit starting circuit is similar to the common slow start circuit. After the voltage dividing resistors R1 and R2 are divided, the voltage regulator is protected by VD1, and the main circuit MOS is fed through the diode D1.
  • the gate-source capacitor C2 of VT3 is charged, the gate-source voltage rises slowly, and the main loop MOS transistor switches from the pinch-off region to the ohmic region via the constant current region, so that the output of the latter stage is slowly established, and the purpose of reducing the inrush current on the line is achieved;
  • C1 is charged by D2, C1 and C2 are of the same capacity level, and the transistor VT1 is not turned on; when power is off or hot swapped, C2 is first discharged through the resistor R5, and the voltage is lower than the voltage drop of a launch junction of C1.
  • FIG. 9 the input voltage and the gate voltage waveform of the main loop MOS transistor when the circuit slow start circuit is powered down are as shown in FIG. 11, and FIG. 11 is a slow start circuit according to an alternative embodiment of the present invention. Schematic diagram of the input voltage and the gate voltage waveform of the main loop MOS transistor.
  • the MOS transistor can be quickly turned off in the power supply loop at the moment of power failure, thereby greatly reducing the impact generated during the hot plugging process.
  • the current improves the reliability of the whole system equipment, and solves the problem that the main circuit MOS tube discharges slowly in the slow start circuit in the related art, and increases the number of devices compared with the circuit in the related art, and basically does not increase the board area, and is suitable for high Density Layout occasions.
  • a discharge circuit is disposed in the circuit of the slow start power supply circuit, and the discharge circuit is used for discharging the switch circuit during power failure or hot plugging, and solves the related art in the related art.
  • the main circuit MOS tube in the circuit discharges slowly.

Abstract

La présente invention concerne un circuit conçu pour démarrer lentement une boucle d'alimentation électrique afin de décharger de l'électricité. Le circuit comprend : un circuit de charge, un circuit de décharge et un circuit de commutation conçus pour un démarrage lent. Le circuit de charge est connecté au circuit de décharge et au circuit de commutation, et le circuit de décharge est connecté au circuit de commutation. Le circuit de charge est conçu pour démarrer lentement une boucle d'alimentation électrique afin d'assurer l'alimentation électrique. Pendant une panne d'alimentation ou le remplacement à chaud, le circuit de décharge est conçu pour décharger de l'électricité du circuit de commutation. La présente invention résout le problème de décharge lente d'un tube MOS de boucle principale dans un circuit de démarrage lent de l'état de la technique.
PCT/CN2015/092219 2015-05-19 2015-10-19 Circuit de démarrage lent de boucle d'alimentation électrique pour décharger de l'électricité WO2016184026A1 (fr)

Applications Claiming Priority (2)

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CN201510258047.2 2015-05-19
CN201510258047.2A CN106301332B (zh) 2015-05-19 2015-05-19 用于缓启动供电回路放电的电路

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WO2016184026A1 true WO2016184026A1 (fr) 2016-11-24

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CN106788362A (zh) * 2017-03-13 2017-05-31 深圳怡化电脑股份有限公司 一种箱体电源热插拔控制电路
CN116340231A (zh) * 2023-03-29 2023-06-27 北京华电众信技术股份有限公司 主板热插拔保护电路

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CN108377303B (zh) * 2018-01-17 2020-05-12 苏州摩联通信技术有限公司 调制解调器和调制解调器的供电方法
CN108494239B (zh) * 2018-04-17 2019-11-22 珠海全志科技股份有限公司 一种高灵敏快速放电电路
CN109245749B (zh) * 2018-12-05 2024-01-30 博为科技有限公司 一种抗电压波动的延时开关电路

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US20060012929A1 (en) * 2004-07-16 2006-01-19 Delta Electronics, Inc. Hot-swap circuit system for fan tray module
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CN203984377U (zh) * 2014-05-27 2014-12-03 广东金莱特电器股份有限公司 一种带有软启动且关断快速的开关电路

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US20060012929A1 (en) * 2004-07-16 2006-01-19 Delta Electronics, Inc. Hot-swap circuit system for fan tray module
CN101398799A (zh) * 2007-09-30 2009-04-01 联想(北京)有限公司 计算机、热插拔设备及热插拔设备启动方法
CN103580461A (zh) * 2012-08-09 2014-02-12 艾默生网络能源有限公司 一种电源输出放电电路
CN103034608A (zh) * 2012-11-27 2013-04-10 福建星网锐捷网络有限公司 热插拔电路、接口电路及电子设备组件
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106788362A (zh) * 2017-03-13 2017-05-31 深圳怡化电脑股份有限公司 一种箱体电源热插拔控制电路
CN116340231A (zh) * 2023-03-29 2023-06-27 北京华电众信技术股份有限公司 主板热插拔保护电路
CN116340231B (zh) * 2023-03-29 2023-12-19 北京华电众信技术股份有限公司 主板热插拔保护电路

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