WO2018036370A1 - 一种缓启动电路及包含该电路的电源板和业务单板 - Google Patents

一种缓启动电路及包含该电路的电源板和业务单板 Download PDF

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WO2018036370A1
WO2018036370A1 PCT/CN2017/096053 CN2017096053W WO2018036370A1 WO 2018036370 A1 WO2018036370 A1 WO 2018036370A1 CN 2017096053 W CN2017096053 W CN 2017096053W WO 2018036370 A1 WO2018036370 A1 WO 2018036370A1
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transistor
slow start
slow
power supply
power
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PCT/CN2017/096053
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English (en)
French (fr)
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王佩佩
付强
潘超
蒋思东
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中兴通讯股份有限公司
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/36—Means for starting or stopping converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/28—Modifications for introducing a time delay before switching

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  • This document relates to, but is not limited to, the field of communication device power supply technology, and in particular, to a slow start circuit and a power board and a service board including the circuit.
  • the communication device When the slow start circuit is installed on the service board of the communication device, the communication device requires the service board to be replaced or restarted without power failure. This requires the device port power supply circuit to support hot swap. Function; in the case that the slow start circuit is set on the power board of the communication device, the power supply circuit of the power board is also required to support the hot plug function.
  • the commonly used slow start circuit is shown in Figure 1.
  • the input power supply part is easy to connect to the socket when it is just inserted into the socket or when the socket is replaced. This causes the input terminal to power off quickly after the power is turned off. In this case, the output terminal is large.
  • the filter capacitor C2 discharges slowly and will always charge C1.
  • the design of the transistor VT1 is intended to discharge the power on C1 as soon as possible, since C1 is slowly discharged through the diode VD2, VT1 is not turned on at all, so C1 cannot be quickly discharged.
  • the driving voltage of the slow-start MOS transistor VT2 cannot be quickly dropped to 0 volts, so that the slow-start MOS transistor does not function as a slow-on state when it is turned on again quickly, and is always in an on state or a half-on state, and the consequence is if When the MOS transistor VT2 is in the half-open state, the input terminal is powered on again.
  • the slow start MOS transistor will generate a large inrush current and transient stress, which may cause damage.
  • the time during which the driving voltage of the simulated slow-start MOS transistor VT2 is powered off is shown in Fig. 2.
  • the vertical axis represents the voltage; the abscissa represents the time in milliseconds; and the output voltage Vout suddenly drops due to the power loss of the input terminal.
  • the slow start MOS transistor VT2 gate voltage Vgs takes nearly 50ms to drop to 0 volts.
  • the embodiment of the invention provides a slow start circuit, a power board and a service board including the circuit,
  • the slow start MOS tube is accelerated and closed, which avoids the risk of slow start circuit when switching on and off quickly.
  • the slow start circuit provided by the embodiment of the invention includes: a slow start MOS transistor, a slow start drive control transistor, and a power supply circuit, wherein
  • the power supply circuit is configured to supply power to the slow start drive control transistor and determine a delay time from the turn-off to the turn-on of the transistor;
  • the power supply circuit is configured to supply power to the triode and turn on the triode through the delay period, and start the slow-start MOS transistor when the triode is turned on;
  • the power supply circuit is configured to stop powering the transistor and disconnect the transistor to turn off the slow start MOS transistor.
  • the power supply circuit includes: a first power supply unit and a second power supply unit, wherein the first power supply unit is configured to supply power to the emitter of the transistor and provide a slow-start capacitor in a voltage division manner;
  • the two power supply units are configured to supply power to the base of the triode in a manner of dividing the resistor and the Zener diode; the collector of the triode is connected to the gate of the slow-start MOS transistor.
  • the buffer capacitor is connected across the emitter and the base of the transistor.
  • the method further includes: a filter storage capacitor connected in parallel with the Zener tube, configured to filter when the power input is powered on, and maintain the base of the transistor when the power input is powered off Voltage.
  • the method further includes: a voltage dividing resistor configured to supply a base of the transistor.
  • the slow start circuit further includes: a current limiting resistor connected between the collector of the triode and the gate of the slow start MOS transistor, and is configured to prevent the gate of the slow start MOS transistor Overcharge voltage.
  • the slow start circuit further includes: connecting between a collector of the transistor and a source or a drain of the slow start MOS transistor and configured to adjust a gate voltage of the slow start MOS transistor Divider resistor.
  • the slow start circuit further includes: a collector connected to the transistor and the A voltage regulator between the source or the drain of the MOS transistor is slowly activated.
  • the triode adopts a PNP type triode, and the slow start MOS transistor selects an NPN type slow start MOS tube;
  • the triode adopts an NPN type triode, and the slow start MOS transistor selects a PNP type slow start MOS tube;
  • the slow-start MOS transistor is connected to one end of the ground.
  • the embodiment of the invention further provides a power board of the communication device, comprising the slow start circuit.
  • the slow start circuit and the power board and the service board including the circuit in the embodiment of the invention accelerate the discharge speed of the gate of the slow start MOS transistor, and avoid the risk brought by the slow start circuit when the switch is frequently turned on and off.
  • the embodiment of the invention is mainly applied to the occasion of inputting frequent switching machines.
  • the slow-start MOS tube in the loop can be quickly closed at the moment of power failure, thereby greatly reducing hot swapping.
  • the transient stress and the large inrush current on the slow-start MOS are generated, the probability of damage of the slow-start MOS transistor is reduced, and the reliability of the slow-start circuit is improved.
  • Figure 1 is a schematic diagram of the composition of the slow start circuit
  • FIG. 2 is a schematic diagram of a power-down condition of a slow-start MOS transistor in a slow-start circuit
  • FIG. 3 is a schematic structural diagram of a slow start circuit according to a first embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a slow start circuit according to a second embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a slow start circuit according to a sixth embodiment of the present invention.
  • FIG. 6 is a schematic diagram showing an example of an optional circuit implementation of a slow start circuit according to a sixth embodiment of the present invention.
  • FIG. 7 is a simulation diagram of power-down simulation of a slow-start MOS transistor in a slow-start circuit according to a sixth embodiment of the present invention.
  • a slow start circuit is connected between an input power supply portion and an output portion.
  • the slow start circuit includes the following components: a slow start MOS transistor 100, Starting the drive control transistor 200 and the power supply circuit 300, wherein
  • the power supply circuit 300 is set to supply the slow start drive control transistor 200 and the slow start drive control transistor 200 is turned on after the delay time, and the slow start drive control transistor 200 is turned on to start the slow start MOS. Tube 100;
  • the power supply circuit 300 is set to stop supplying power to the slow start drive control transistor 200 and disconnect the slow start drive control transistor 200 to turn off the slow start MOS transistor 100.
  • a slow start circuit is connected between an input power supply portion and an output portion.
  • the embodiment is substantially the same as the first embodiment, and the difference is that the implementation
  • the example further defines an implementation of the power supply circuit:
  • the method further includes: a filter storage capacitor connected in parallel with the Zener tube, configured to filter when the power input is powered on, and maintain the power when the power input is powered off The voltage at the base of the triode.
  • the method further includes: a voltage dividing resistor configured to supply a base of the transistor.
  • a third embodiment of the present invention is a slow start circuit, which is connected between an input power supply portion and an output portion. This embodiment is substantially the same as the second embodiment, except that the present embodiment is in the second embodiment. Based on some optional implementations:
  • the slow start circuit of the embodiment further includes: a current limiting resistor connected between the collector of the transistor and the gate of the slow start MOS transistor, and is configured to prevent the slow start MOS Overcharge voltage of the tube gate.
  • the slow start circuit of the embodiment further includes: connecting the collector of the transistor to a source or a drain of the slow start MOS transistor and configured to adjust the slow start MOS transistor The voltage dividing resistor of the gate voltage.
  • the slow start circuit of the embodiment further includes: a voltage stabilizing tube connected between the collector of the transistor and the source or the drain of the slow start MOS transistor.
  • the triode adopts a PNP type triode, and the slow start MOS transistor selects an NPN type slow start MOS tube;
  • the triode adopts an NPN type triode, and the slow start MOS transistor selects a PNP type slow start MOS tube;
  • the slow-start MOS transistor is connected to one end of the ground.
  • a fourth embodiment of the present invention is a power supply board for a communication device, comprising a slow start circuit in the first, second or third embodiment.
  • a fifth embodiment of the present invention is a service board of a communication device, where the service board includes a slow start circuit in the first, second or third embodiment on the power input side.
  • the sixth embodiment of the present invention is based on the above embodiment and is described with reference to Figs.
  • the embodiment of the present invention adopts the slow start circuit in FIG. 5, and mainly includes the following parts:
  • C and D supply power to the b and e poles of the B-part transistor to control the turn-on and turn-off of the B-part transistor, while the turn-on and turn-off of the B-part transistor directly control the gate voltage of the slow-start MOS transistor. Therefore, the function of the slow start is realized.
  • the gate of the MOS transistor when the input power is off, the gate of the MOS transistor is not activated, and the gate voltage of the MOS transistor can be quickly lowered to 0V after passing through the B part circuit.
  • FIG. 6 An alternative circuit implementation example of an embodiment of the present invention is shown in FIG. 6, including but not limited to the PNP transistor depicted in this figure, the number of resistors and capacitors, and the like.
  • VT2 is a slow-start MOS tube, and VT1 is composed of part B;
  • R1, VD1, C1, R4 and R5 form a C part; wherein the necessary component is a first voltage dividing resistor R1 and a first voltage stabilizing tube VD1 for supplying the b pole of B in a voltage dividing manner, optionally A filter capacitor C1 is also added, and a fourth voltage dividing resistor R4 and a fifth voltage dividing resistor R5 are provided which provide a suitable potential for the b pole of B to match the e pole.
  • R2, R3, C2, C3, VD2 and VD3 form the D three parts, wherein the necessary components are the second voltage dividing resistor R2 and the third voltage dividing resistor R3, and the second slow-start capacitor C2 or the third slowing
  • the slow start circuit of this embodiment can both make VT2 play a slow-starting effect and can quickly discharge the VT2 gate. Its working principle diagram is as follows:
  • VT1 When charging to the voltage of b and e that meets VT1 reaches the turn-on voltage, VT1 is turned on;
  • VT1 The e pole of VT1 is divided and supplied by R2 and R3. As the input voltage decreases, the e pole voltage also decreases. When the b pole voltage is constant and the e pole voltage is lowered, the bipolar voltage drops rapidly. Below the turn-on voltage, causing VT1 to turn off;
  • the embodiment of the invention not only has the advantages of simple circuit, low cost and high reliability, but also can avoid the problem that the main circuit MOS tube discharges slowly in the slow start circuit, has application prospect and value, and is innovative.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)
  • Rectifiers (AREA)
  • Direct Current Feeding And Distribution (AREA)
  • Electronic Switches (AREA)

Abstract

一种缓启动电路及包含该电路的电源板和业务单板，该缓启动电路，包括：缓启动MOS管(100)、缓启动驱动控制三极管(200)和供电电路(300)，其中，供电电路(300)，设置为对缓启动驱动控制三极管(200)供电并决定所述三极管(200)从关断到导通的延迟时长；从电源输入端上电开始，所述供电电路(300)设置为为所述三极管(200)供电并使所述三极管(200)经过所述延迟时长而导通，所述三极管(200)导通时启动缓启动MOS管(100)；从电源输入端掉电开始，所述供电电路(300)设置为停止为所述三极管(200)供电并使所述三极管(200)断开以关闭缓启动MOS管(100)。

Description

一种缓启动电路及包含该电路的电源板和业务单板 技术领域
本文涉及但不限于通信设备供电技术领域，尤其涉及一种缓启动电路及包含该电路的电源板和业务单板。
背景技术
在缓启动电路设置在通信设备的业务单板上的情况下，通信设备都要求在整机不掉电的情况下对业务单板进行更换或者重启，这就要求设备端口供电回路支持热插拔功能；在缓启动电路设置在通信设备的电源板上的情况下，也要求电源板的供电回路支持热插拔功能。
常用的缓启动电路见图1，输入供电部分在刚插入插座时或者更换插座时很容易与插座连接不稳定，导致发生输入端掉电后又快速上电，在这种情况下，输出端大滤波电容C2放电慢，会一直给C1充电，虽然三极管VT1的设计初衷是为了尽快放掉C1上的电量，由于C1通过二极管VD2缓慢放电而使VT1根本没能导通，所以C1无法快速放电导致缓启动MOS管VT2的驱动电压不能快速掉到0伏，以至于再次快速开机的情况下，缓启动MOS管起不到缓启的功能，一直处于开通状态或者半开通状态，这样的后果是如果缓启动MOS管VT2正好在半开通状态的时候输入端再次上电开机，缓启动MOS管会产生很大冲击电流和瞬时应力，有损坏风险。其中仿真的缓启动MOS管VT2的驱动电压掉电的时间见图2，图中纵坐标表示电压；横坐标表示时间，单位是毫秒；从输出端电压Vout因输入端掉电而陡然下降开始，缓启动MOS管VT2栅极电压Vgs需要近50ms才能降到0伏。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
本发明实施例提供一种缓启动电路及包含该电路的电源板和业务单板， 实现缓启动MOS管加速关闭，避免缓启动电路在快速频繁开关机时所带来的风险。
本发明实施例提供的缓启动电路，包括：缓启动MOS管、缓启动驱动控制三极管和供电电路，其中，
供电电路设置为对缓启动驱动控制三极管供电并决定所述三极管从关断到导通的延迟时长；
从电源输入端上电开始，所述供电电路设置为为所述三极管供电并使所述三极管经过所述延迟时长而导通，所述三极管导通时启动缓启动MOS管；
从电源输入端掉电开始，所述供电电路设置为停止为所述三极管供电并使所述三极管断开以关闭缓启动MOS管。
可选的，所述供电电路，包括：第一供电单元以及第二供电单元，其中，第一供电单元设置为以电阻分压的方式为所述三极管的发射极供电并提供缓启电容；第二供电单元设置为以电阻和稳压管分压的方式为所述三极管的基极供电；所述三极管的集电极与所述缓启动MOS管的栅极相连。
可选的，在第一供电单元中，所述缓启电容跨接在所述三极管的发射极和基极的两端。
可选的，在第二供电单元中，还包括：与稳压管并联的滤波储能电容，设置为在电源输入端上电时进行滤波并且在电源输入端掉电时维持所述三极管基极的电压。
可选的，在第二供电单元中，还包括：设置为为所述三极管的基极供电的分压电阻。
可选的，所述缓启动电路，还包括：连接于所述三极管的集电极与所述缓启动MOS管的栅极之间的限流电阻，设置为防止所述缓启动MOS管栅极的过充电压。
可选的，所述缓启动电路，还包括：连接于所述三极管的集电极与所述缓启动MOS管的源极或漏极之间且设置为调整所述缓启动MOS管栅极电压的分压电阻。
可选的，所述缓启动电路，还包括：连接于所述三极管的集电极与所述 缓启动MOS管的源极或漏极之间的稳压管。
可选的，在电源输入端上电为地和负电压的情况下，所述三极管选用PNP型三极管，所述缓启动MOS管选用NPN型缓启动MOS管；
在电源输入端上电为正电压和地的情况下，所述三极管选用NPN型三极管，所述缓启动MOS管选用PNP型缓启动MOS管；
所述缓启动MOS管接入非地的一端。
本发明实施例还提供一种通信设备的电源板，包含上述缓启动电路。
本发明实施例还提供一种通信设备的业务单板，所述业务单板在电源输入侧包含上述缓启动电路。
本发明实施例至少具有下列优点：
本发明实施例所述缓启动电路及包含该电路的电源板和业务单板，加快了缓启动MOS管栅极的放电速度，避免了缓启动电路在频繁开关机时所带来的风险。本发明实施例主要应用于输入频繁开关机的场合，在直流电源单板频繁带电插拔的过程中，能在掉电瞬间迅速关闭回路中的缓启动MOS管，从而大大地减小热插拔过程中产生在缓启MOS上的瞬时应力和大的冲击电流，减小缓启动MOS管损坏的概率，提升了缓启动电路的可靠性。
在阅读并理解了附图和详细描述后，可以明白其他方面。
附图概述
图1为缓启动电路组成示意图；
图2为缓启动电路中缓启动MOS管的掉电情况示意图；
图3为本发明第一实施例的缓启动电路组成示意图；
图4为本发明第二实施例的缓启动电路组成示意图；
图5为本发明第六实施例的缓启动电路组成示意图；
图6为本发明第六实施例的缓启动电路的一个可选电路实现示例示意图；
图7为本发明第六实施例的缓启动电路中缓启动MOS管的掉电仿真示 意图。
本发明的实施方式
以下结合附图及可选实施例，对本发明实施例进行详细说明如后。
本发明第一实施例，一种缓启动电路，该缓启动电路接入输入供电部分与输出部分之间，如图3所示，该缓启动电路包括以下组成部分：缓启动MOS管100、缓启动驱动控制三极管200和供电电路300，其中，
供电电路300，设置为对缓启动驱动控制三极管200供电并决定缓启动驱动控制三极管200从关断到导通的延迟时长；
从电源输入端上电开始，供电电路300设置为缓启动驱动控制三极管200供电并使缓启动驱动控制三极管200经过所述延迟时长而导通，缓启动驱动控制三极管200导通时启动缓启动MOS管100；
从电源输入端掉电开始，供电电路300设置为停止为缓启动驱动控制三极管200供电并使缓启动驱动控制三极管200断开以关闭缓启动MOS管100。
本发明第二实施例，一种缓启动电路，该缓启动电路接入输入供电部分与输出部分之间，如图4所示，本实施例与第一实施例大致相同，区别在于，本实施例进一步限定了供电电路的一种实现方式：
供电电路300，包括：第一供电单元301以及第二供电单元302，其中，第一供电单元301设置为以电阻分压的方式为缓启动驱动控制三极管200的发射极供电并提供缓启电容；第二供电单元302设置为以电阻和稳压管分压的方式为缓启动驱动控制三极管200的基极供电；缓启动驱动控制三极管200的集电极与缓启动MOS管100的栅极相连。
可选的，在第一供电单元301中，所述缓启电容跨接在所述三极管发射极和基极的两端。
可选的，在第二供电单元302中，还包括：与稳压管并联的滤波储能电容，设置为在电源输入端上电时进行滤波并且在电源输入端掉电时维持所述 三极管基极的电压。
可选的，在第二供电单元302中，还包括：设置为为所述三极管的基极供电的分压电阻。
本发明第三实施例，一种缓启动电路，该缓启动电路接入输入供电部分与输出部分之间，本实施例与第二实施例大致相同，区别在于，本实施例在第二实施例的基础上提供了一些可选的实现方案：
可选的，本实施例的所述缓启动电路，还包括：连接于所述三极管的集电极与所述缓启动MOS管的栅极之间的限流电阻，设置为防止所述缓启动MOS管栅极的过充电压。
可选的，本实施例的所述缓启动电路，还包括：连接于所述三极管的集电极与所述缓启动MOS管的源极或漏极之间且设置为调整所述缓启动MOS管栅极电压的分压电阻。
可选的，本实施例的所述缓启动电路，还包括：连接于所述三极管的集电极与所述缓启动MOS管的源极或漏极之间的稳压管。
可选的，在电源输入端上电为地和负电压的情况下，所述三极管选用PNP型三极管，所述缓启动MOS管选用NPN型缓启动MOS管；
在电源输入端上电为正电压和地的情况下，所述三极管选用NPN型三极管，所述缓启动MOS管选用PNP型缓启动MOS管；
所述缓启动MOS管接入非地的一端。
本发明第四实施例，一种通信设备的电源板，包含第一、二或三实施例中的缓启动电路。
本发明第五实施例，一种通信设备的业务单板，所述业务单板在电源输入侧包含第一、二或三实施例中的缓启动电路。
本发明第六实施例，本实施例是在上述实施例的基础上，结合附图5～7进行介绍。
本发明实施例采用图5中的缓启动电路，主要包含如下几个部分：
A：缓启动MOS管；
B：缓启动驱动控制部分-----三极管；
C：驱动控制电路b极供电部分；
D：驱动控制电路e极供电部分。
C和D给B部分三极管的b和e极供电，用来控制B部分三极管的导通和关断，而B部分的三极管的导通和关断直接控制着缓启动MOS管的栅极电压，从而实现缓启动的功能，特别的，本发明实施例在输入掉电的时候，缓启动MOS管的栅极没有电容，通过B部分电路之后缓启动MOS管的栅极电压可以迅速降到0V。
本发明实施例的一个可选电路实现示例如图6所示，包括但不限此图中所画的PNP三极管，电阻电容数量等。其中VT2是缓启动MOS管，VT1组成了B部分；
R1、VD1、C1、R4和R5组成了C部分；其中，必要的组成部分是以分压的方式为B的b极供电的第一分压电阻R1和第一稳压管VD1，可选的，还加入了滤波储能电容C1、以及设置为对B的b极提供与e极匹配的合适电位的第四分压电阻R4和第五分压电阻R5。
R2、R3、C2、C3、VD2和VD3等组成了D三部分，其中，必要的组成部分是第二分压电阻R2和第三分压电阻R3、以及第二缓启电容C2或第三缓启电容C3，可选的，还加入了第二稳压管VD2和第三稳压管VD3，设置为防止反向电压度电路的损坏。
本实施例的缓启动电路既能让VT2起到缓启作用又能让VT2栅极快速放电。其工作原理图如下：
1)输入上电时，先通过R1，对VD1和C1充电，再通过R2，R3对C2和C3充电；
2)当充电到满足VT1的b、e两极电压达到开启电压时，VT1导通；
3)VT1导通后，VT2的gs端电压建立，VT2导通，完成了缓启动的功能；
4)输入掉电时，VT1的b极由R1和稳压管VD1供电，就算输入电压掉的很低，也能继续维持Vb的电压，保持Vb电压不变；
5)VT1的e极由R2和R3分压供电，随着输入电压的降低，e极电压也随之降低，在b极电压不变，e极电压降低的情况下，be两极电压很快降到开启电压以下，从而使VT1关闭；
6)VT1关闭后，VT2的栅极没有电容，所以VT2栅极电压也瞬速降到0，让VT2不导通，从而迅速关闭了缓启动电路，见附图7仿真结果。
对比图2和图7的仿真波形，很明显图7的Vgs电压降的很快。
本发明实施例不仅电路简单、成本低、可靠性高，而且能够避免缓启动电路中主回路MOS管放电缓慢的问题，有应用前景和价值，有创新性。
以上所述仅为本发明的可选示例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
通过具体实施方式的说明，应当可对本发明为达成预定目的所采取的技术手段及功效得以更加深入且具体的了解，然而所附图示仅是提供参考与说明之用，并非用来对本发明加以限制。
工业实用性
可应用于输入频繁开关机的场合，在直流电源单板频繁带电插拔的过程中，能在掉电瞬间迅速关闭回路中的缓启动MOS管，从而大大地减小热插拔过程中产生在缓启MOS上的瞬时应力和大的冲击电流，减小缓启动MOS管损坏的概率，提升了缓启动电路的可靠性。

Claims (11)

  1. 一种缓启动电路，包括：缓启动MOS管(100)、缓启动驱动控制三极管(200)和供电电路(300)，其中，
    供电电路(300)，设置为对缓启动驱动控制三极管(200)供电并决定所述三极管(200)从关断到导通的延迟时长；
    从电源输入端上电开始，所述供电电路(300)设置为为所述三极管(200)供电并使所述三极管(200)经过所述延迟时长而导通，所述三极管(200)导通时启动缓启动MOS管(100)；
    从电源输入端掉电开始，所述供电电路(300)设置为停止为所述三极管(200)供电并使所述三极管(200)断开以关闭缓启动MOS管(100)。
  2. 根据权利要求1所述的缓启动电路，其中，所述供电电路(300)，包括：第一供电单元(301)以及第二供电单元(302)，其中，第一供电单元(301)，设置为以电阻分压的方式为所述三极管(200)的发射极供电并提供缓启电容；第二供电单元(302)，设置为以电阻和稳压管分压的方式为所述三极管(200)的基极供电；所述三极管(200)的集电极与所述缓启动MOS管(100)的栅极相连。
  3. 根据权利要求2所述的缓启动电路，其中，在第一供电单元(301)中，所述缓启电容跨接在所述三极管(200)的发射极和基极的两端。
  4. 根据权利要求2所述的缓启动电路，在第二供电单元(302)中，还包括：与稳压管并联的滤波储能电容，设置为在电源输入端上电时进行滤波并且在电源输入端掉电时维持所述三极管(200)基极的电压。
  5. 根据权利要求4所述的缓启动电路，在第二供电单元(302)中，还包括：设置为为所述三极管(200)的基极供电的分压电阻。
  6. 根据权利要求2所述的缓启动电路，所述缓启动电路，还包括：连接于所述三极管(200)的集电极与所述缓启动MOS管(100)的栅极之间的限流电阻，设置为防止所述缓启动MOS管(100)栅极的过充电压。
  7. 根据权利要求2所述的缓启动电路，所述缓启动电路，还包括：连接于所述三极管(200)的集电极与所述缓启动MOS管(100)的源极或漏 极之间且设置为调整所述缓启动MOS管(100)栅极电压的分压电阻。
  8. 根据权利要求2所述的缓启动电路，所述缓启动电路，还包括：连接于所述三极管(200)的集电极与所述缓启动MOS管(100)的源极或漏极之间的稳压管。
  9. 根据权利要求1～8中任一项所述的缓启动电路，其中，在电源输入端上电为地和负电压的情况下，所述三极管(200)选用PNP型三极管，所述缓启动MOS管(100)选用NPN型缓启动MOS管；
    在电源输入端上电为正电压和地的情况下，所述三极管(200)选用NPN型三极管，所述缓启动MOS管(100)选用PNP型缓启动MOS管；
    所述缓启动MOS管(100)接入非地的一端。
  10. 一种通信设备的电源板，包含如权利要求1至9中任一项所述的缓启动电路。
  11. 一种通信设备的业务单板，所述业务单板在电源输入侧包含如权利要求1至9中任一项所述的缓启动电路。
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108631572A (zh) * 2018-06-28 2018-10-09 深圳振华富电子有限公司 电源缓启动模块及电子设备
CN109995354A (zh) * 2019-05-08 2019-07-09 博为科技有限公司 一种基于上升沿采样的抗电压波动的延时开关电路
CN110481353A (zh) * 2019-08-13 2019-11-22 科华恒盛股份有限公司 一种直流缓启动装置及方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109067161A (zh) * 2018-08-09 2018-12-21 中国铁道科学研究院集团有限公司 一种电源安全启动系统
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
CN109672434A (zh) * 2018-12-24 2019-04-23 优数通（北京）科技有限公司 一种汽车电子控制器电源电压延迟开启保护电路
CN109767715A (zh) * 2019-03-11 2019-05-17 京东方科技集团股份有限公司 缓启动电路、集成电源管理电路及显示设备
CN113346737B (zh) * 2021-04-29 2022-09-20 山东英信计算机技术有限公司 一种可调控延迟电路、延迟电路系统及方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002344250A (ja) * 2001-05-14 2002-11-29 Victor Co Of Japan Ltd オーディオ用ｍｏｓ・ｆｅｔ電力増幅回路
CN201044435Y (zh) * 2007-05-31 2008-04-02 深圳创维－Rgb电子有限公司 一种上电延时电路
CN201181903Y (zh) * 2008-04-01 2009-01-14 中兴通讯股份有限公司 直流电源的输入电路
CN102570785A (zh) * 2010-12-30 2012-07-11 中兴通讯股份有限公司 一种直流电源热插拔缓启动控制电路及控制方法
CN203872146U (zh) * 2014-05-22 2014-10-08 武金一 一种供电延时电路

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0462608A (ja) * 1990-06-29 1992-02-27 Nec Corp Ｄｃ―ｄｃコンバータの突入電流防止回路
CN100342647C (zh) * 2004-03-23 2007-10-10 华为技术有限公司 一种正电源输入负载上电缓启动的电路
CN202309659U (zh) * 2011-11-17 2012-07-04 中兴通讯股份有限公司 一种电源输入负载上电缓启动装置
CN104218927B (zh) * 2014-09-03 2018-08-07 苏州旭创科技有限公司 缓启动电路及具有其的光模块
CN204441853U (zh) * 2015-02-06 2015-07-01 青岛歌尔声学科技有限公司 一种过压保护电路及电子产品

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002344250A (ja) * 2001-05-14 2002-11-29 Victor Co Of Japan Ltd オーディオ用ｍｏｓ・ｆｅｔ電力増幅回路
CN201044435Y (zh) * 2007-05-31 2008-04-02 深圳创维－Rgb电子有限公司 一种上电延时电路
CN201181903Y (zh) * 2008-04-01 2009-01-14 中兴通讯股份有限公司 直流电源的输入电路
CN102570785A (zh) * 2010-12-30 2012-07-11 中兴通讯股份有限公司 一种直流电源热插拔缓启动控制电路及控制方法
CN203872146U (zh) * 2014-05-22 2014-10-08 武金一 一种供电延时电路

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108631572A (zh) * 2018-06-28 2018-10-09 深圳振华富电子有限公司 电源缓启动模块及电子设备
CN109995354A (zh) * 2019-05-08 2019-07-09 博为科技有限公司 一种基于上升沿采样的抗电压波动的延时开关电路
CN109995354B (zh) * 2019-05-08 2024-04-09 博为科技有限公司 一种基于上升沿采样的抗电压波动的延时开关电路
CN110481353A (zh) * 2019-08-13 2019-11-22 科华恒盛股份有限公司 一种直流缓启动装置及方法

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