CN106685192A - Power supply circuit of switch system - Google Patents

Power supply circuit of switch system Download PDF

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Publication number
CN106685192A
CN106685192A CN201611097155.7A CN201611097155A CN106685192A CN 106685192 A CN106685192 A CN 106685192A CN 201611097155 A CN201611097155 A CN 201611097155A CN 106685192 A CN106685192 A CN 106685192A
Authority
CN
China
Prior art keywords
connected
power supply
electric capacity
dc
module
Prior art date
Application number
CN201611097155.7A
Other languages
Chinese (zh)
Inventor
夏伟伟
张志军
徐彦召
孔军
Original Assignee
盛科网络(苏州)有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 盛科网络(苏州)有限公司 filed Critical 盛科网络(苏州)有限公司
Priority to CN201611097155.7A priority Critical patent/CN106685192A/en
Publication of CN106685192A publication Critical patent/CN106685192A/en

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/02Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/08Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/02Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/06Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
    • H02M3/07Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps

Abstract

The embedment of the invention provides a power supply circuit of a switch system. The power supply circuit comprises a slow start module and a DC-DC module, wherein a power supply source passes through the slow start module and then enters the DC-DC module; the slow start module comprises a first resistor, a second resistor, a first capacitor, a voltage stabilizing tube, an MOS transistor, a third resistor, a fourth resistor and a second capacitor; the first resistor and the first capacitor form a first RC series circuit; the first RC series circuit is connected in front of a source and a grid of the MOS transistor in parallel; voltage applied to the MOS transistor can be controlled by adjusting the values of the first resistor and the first capacitor and control on threshold voltage of the MOS transistor is achieved; and meanwhile, the voltage stabilizing tube is connected with the second resistor in parallel to form a voltage stabilizing circuit. According to the power supply circuit provided by the invention, slow start of the MOS transistor is achieved, slow power-up of high voltage is achieved, the damage of surge current to a board is avoided, meanwhile, the stability of the system is also ensured and protection on a power supply system is achieved.

Description

The power supply circuits of switch system

Technical field

The present invention relates to electronic technology field, more particularly to a kind of power supply circuits of switch system.

Background technology

In the power-supply system for supporting pluggable board, during board insertion main frame, main frame is already at stable work shape State, all capacitive loads have charged.Board to be inserted is not charged, and the capacitive load on board is uncharged.In heat insertion plate During card, the electric capacity momentary charge on board to be inserted, charging process will receive substantial amounts of in the moment of insertion from system power supply Electric current, causes system voltage moment to be fallen, and affects the normal operation of other boards.In the moment of power supply linear contact lay, system power supply Output resistance and board to be inserted electric capacity composition RC charge tunnels, due to the output resistance very little of power supply, thus surge current It is very big.During board is extracted, the shunt capacitance electric discharge on board forms a low impedance path and backboard between, Instantaneous large-current can be produced.

During the present invention is realized, inventor has found at least there is following technical problem in prior art:

The surge current produced during plug-in card can cause to damage to board.

The content of the invention

The power supply circuits of the switch system that the present invention is provided, upper electric controllable-rate, it is to avoid surge current is to board Damage, realize the protection to board device.

In a first aspect, the present invention provides a kind of power supply circuits of switch system, including:Delay startup module and DC-DC moulds Block, enters the DC-DC module, wherein the delay startup module includes after power supply delay startup module described in:First is electric Resistance, second resistance, the first electric capacity, stabilivolt, metal-oxide-semiconductor, 3rd resistor, the 4th resistance and the second electric capacity, wherein,

The first resistor and the second resistance series connection in power supply both sides, wherein the first resistor and power supply Positive source connects, and the second resistance is connected with power supply negative pole, and at the second resistance two ends described first is parallel with Electric capacity and the stabilivolt, the positive pole of the stabilivolt is connected with the negative pole of first electric capacity;

The 3rd resistor is connected between the positive pole of the grid of the metal-oxide-semiconductor and first electric capacity;

The source electrode of the metal-oxide-semiconductor is connected with the negative pole of first electric capacity;

The drain electrode of the metal-oxide-semiconductor is connected with the input negative pole of DC-DC module, the input positive pole of the DC-DC module and institute State the connection of power supply positive pole;

4th resistance and the second capacitances in series are connected between the drain electrode of the metal-oxide-semiconductor and source electrode.

Alternatively, first electric capacity is electrochemical capacitor.

Alternatively, the circuit also includes:Overcurrent-overvoltage module, overcurrent-overvoltage module described in the power supply Jing is laggard Enter the delay startup module, the overcurrent-overvoltage module includes electric fuse, TVS pipe and varistor, one end of the electric fuse Be connected with the power supply negative pole, the circuit that the other end is composed in parallel by the TVS pipe and the varistor with it is described Power supply positive pole connects.

Alternatively, the circuit also includes:Filtration module, the filtration module is located at the delay startup module and DC-DC Between module, including an X electric capacity, the 2nd X electric capacity, the first Y capacitance, the second Y capacitance, the 3rd Y capacitance, the 4th Y capacitance and altogether Mould choke coil,

An X electric capacity, the first Y capacitance and the second Y capacitance are connected between the input both positive and negative polarity of the common mode choke, wherein The first X electric capacity is simultaneously connected between the input both positive and negative polarity of the common mode choke, and first Y capacitance is connected on the common mode Between the input positive pole of choke coil and ground, second Y capacitance is connected between the input negative pole of the common mode choke and ground, institute The input positive pole for stating common mode choke is connected with the power supply positive pole, the input negative pole of the common mode choke with it is described The drain electrode of metal-oxide-semiconductor is connected;

The 2nd X electric capacity, the 3rd Y capacitance and the 4th Y capacitance are connected between the output both positive and negative polarity of the common mode choke, wherein The 2nd X electric capacity is simultaneously connected between the output both positive and negative polarity of the common mode choke, and the 3rd Y capacitance is connected on the common mode Between the output cathode and ground of choke coil, the 4th Y capacitance is connected between the output negative pole of the common mode choke and ground, institute The output both positive and negative polarity for stating common mode choke is connected respectively with the input both positive and negative polarity of the DC-DC module.

The power supply circuits of switch system provided in an embodiment of the present invention, including delay startup module and DC-DC module, power supply The DC-DC module is entered after power supply delay startup module described in, wherein the delay startup module includes:First resistor, second Resistance, the first electric capacity, stabilivolt, metal-oxide-semiconductor, 3rd resistor, the 4th resistance and the second electric capacity, wherein first resistor and the first electric capacity A RC series circuits are constituted, a RC series circuits are connected in parallel on before the source electrode of the metal-oxide-semiconductor and grid, by adjusting The value for saving the first resistor and first electric capacity can control the voltage being added on the metal-oxide-semiconductor, realize to the MOS The control of pipe cut-in voltage, while defining mu balanced circuit by the stabilivolt and the second resistance parallel connection.The present invention is provided Power supply circuits, realize the slow unlatching to metal-oxide-semiconductor, and realize to high-tension slow upper electricity, it is to avoid surge current is to plate The damage of card, while also ensure that the stability of system, realizes the protection to power-supply system.

Description of the drawings

Fig. 1 is the power supply circuits schematic diagram of one embodiment of the invention switch system;

Fig. 2 is the power supply circuit of another embodiment of the present invention switch system;

Fig. 3 is the power supply circuit of further embodiment of this invention switch system.

Specific embodiment

To make purpose, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only Only it is a part of embodiment of the invention, rather than the embodiment of whole.Based on the embodiment in the present invention, ordinary skill The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.

The present invention provides a kind of power supply circuits of switch system, as shown in figure 1, the circuit includes:Delay startup module And DC-DC module, the DC-DC module is entered after power supply delay startup module described in, specifically, as shown in Fig. 2 described Delay startup module includes:First resistor R2, second resistance R3, the first electric capacity C1, stabilivolt D2, metal-oxide-semiconductor, 3rd resistor R4, Four resistance R5 and the second electric capacity C2, wherein,

First resistor R2 with the second resistance R3 series connection in power supply both sides, wherein first resistor R2 It is connected with power supply positive pole, second resistance R3 is connected with power supply negative pole, it is in parallel at the second resistance R3 two ends Have the first electric capacity C1 and stabilivolt D2, the first electric capacity C1 is electrochemical capacitor, the positive pole of the stabilivolt D2 with The negative pole of the first electric capacity C1 is connected;

3rd resistor R4 is connected between the positive pole of the grid of the metal-oxide-semiconductor and the first electric capacity C1;

The source electrode of the metal-oxide-semiconductor is connected with the negative pole of the first electric capacity C1;

The drain electrode of the metal-oxide-semiconductor is connected with the input negative pole of DC-DC module, the input positive pole of the DC-DC module and institute State the connection of power supply positive pole;

The 4th resistance R5 and the second electric capacity C2 series connections are between the drain electrode of the metal-oxide-semiconductor and source electrode;

The stabilivolt D2 and second resistance R3 have composed in parallel mu balanced circuit, first resistor R2 and described One electric capacity C1 constitutes a RC series circuits, and the mu balanced circuit ensure that the stability of system, and described by adjusting The value of first resistor and first electric capacity can control the voltage being added on the metal-oxide-semiconductor, realizes and the metal-oxide-semiconductor is opened The control of voltage, so as to reduce the value of surge current, and farthest reduce that warm swap brings to board it is negative Affect.

Specifically, the present invention is realized the voltage of switch system 48V using DC-DC module PKB4113CPI of Ericsson The 12V voltages of system needs are changed into, is used for late-class circuit.

The power supply circuits of switch system provided in an embodiment of the present invention, including delay startup module and DC-DC module, power supply The DC-DC module is entered after power supply delay startup module described in, wherein the delay startup module includes:First resistor, second Resistance, the first electric capacity, stabilivolt, metal-oxide-semiconductor, 3rd resistor, the 4th resistance and the second electric capacity, wherein first resistor and the first electric capacity A RC series circuits are constituted, a RC series circuits are connected in parallel on before the source electrode of the metal-oxide-semiconductor and grid, by adjusting The value for saving the first resistor and first electric capacity can control the voltage being added on the metal-oxide-semiconductor, realize to the MOS The control of pipe cut-in voltage, while defining mu balanced circuit by the stabilivolt and the second resistance parallel connection.The present invention is provided Power supply circuits, realize the slow unlatching to metal-oxide-semiconductor, and realize to high-tension slow upper electricity, it is to avoid surge current is to plate The damage of card, while also ensure that the stability of system, realizes the protection to power-supply system.

Alternatively, as shown in figure 3, the power supply circuits of the switch system also include:Overcurrent-overvoltage module and filtering mould Block, the overcurrent-overvoltage module is used to protect the circuit from damaging in the case of big voltage or overcurrent, the filtration module Interference is touched for filtering common mode and difference,

The delay startup module, the overcurrent-overvoltage module bag are entered after power supply overcurrent-overvoltage module described in Electric fuse F1, TVS pipe D1 and varistor R1 are included, one end of the electric fuse is connected with the power supply negative pole, the other end The circuit composed in parallel by TVS pipe D1 and the varistor R1 is connected with the power supply positive pole;

The filtration module be located between the delay startup module and DC-DC module, including Schottky diode D3, first X electric capacity C5, the 2nd X electric capacity C6, the first Y capacitance C3, the second Y capacitance C4, the 3rd Y capacitance C7, the 4th Y capacitance C8 and common mode chokes Circle L1, wherein the first X electric capacity C5 and the 2nd X electric capacity C6 is electrochemical capacitor, an X electric capacity C5 and the 2nd X electric capacity C6 Positive pole be connected with output cathode respectively at the input positive pole of the common mode choke L1,

An X electric capacity C5, the first Y capacitance C3 and the 2nd Y are connected between the input both positive and negative polarity of the common mode choke L1 electric Hold C4, wherein the Schottky diode D3 is further connected between the first X electric capacity C5 and the drain electrode of the MOS, in the confession During electric power cut-off, the Schottky diode D3 is used to prevent the electric energy stored in the common mode choke from pouring in down a chimney back described delaying Starting module, the positive pole of the Schottky diode D3 is connected with the negative pole of the X electric capacity C5, the X electric capacity C5 And be connected between the input both positive and negative polarity of the common mode choke, first Y capacitance C3 is connected on the defeated of the common mode choke Enter between positive pole and ground, second Y capacitance C4 is connected between the input negative pole of the common mode choke and ground, and the common mode is gripped The input positive pole of stream circle L1 is connected with the power supply positive pole, input negative pole and the metal-oxide-semiconductor of the common mode choke L1 Drain electrode be connected;

The 2nd X electric capacity C6, the 3rd Y capacitance C7 and the 4th Y capacitance are connected between the output both positive and negative polarity of the common mode choke C8, wherein the second X electric capacity C6 and being connected between the output both positive and negative polarity of the common mode choke L1, the 3rd Y capacitance C7 is connected between the output cathode of the common mode choke L1 and ground, and the 4th Y capacitance C8 is connected on the common mode choke L1 Output negative pole and ground between, the common mode choke L1 output both positive and negative polarity it is positive and negative with the input of the DC-DC module respectively Extremely it is connected;

The filtration module is by using the X electric capacity, the Y capacitance and the common mode choke, having filtered switch The interference of system 48V voltage.

Wherein, between the output both positive and negative polarity and the DC-DC module of the common mode choke L1, also it is parallel with the 5th electric capacity C9 and the 6th electric capacity C10, wherein the 5th electric capacity is electrochemical capacitor C9, the positive pole of the 5th electric capacity C9 is gripped with the common mode The output cathode of stream circle is connected.

The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any Those familiar with the art the invention discloses technical scope in, the change or replacement that can be readily occurred in, all should It is included within the scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.

Claims (4)

1. a kind of power supply circuits of switch system, it is characterised in that the circuit includes:Delay startup module and DC-DC module, The DC-DC module is entered after power supply delay startup module described in, wherein the delay startup module includes:First resistor, Second resistance, the first electric capacity, stabilivolt, metal-oxide-semiconductor, 3rd resistor, the 4th resistance and the second electric capacity, wherein,
The first resistor with the second resistance series connection in power supply both sides, wherein the first resistor and power supply Positive pole connects, and the second resistance is connected with power supply negative pole, and at the second resistance two ends first electric capacity is parallel with And the stabilivolt, the positive pole of the stabilivolt is connected with the negative pole of first electric capacity;
The 3rd resistor is connected between the positive pole of the grid of the metal-oxide-semiconductor and first electric capacity;
The source electrode of the metal-oxide-semiconductor is connected with the negative pole of first electric capacity;
The drain electrode of the metal-oxide-semiconductor is connected with the input negative pole of DC-DC module, input positive pole and the confession of the DC-DC module Electric positive source connection;
4th resistance and the second capacitances in series are connected between the drain electrode of the metal-oxide-semiconductor and source electrode.
2. circuit according to claim 1, it is characterised in that first electric capacity is electrochemical capacitor.
3. circuit according to claim 1, it is characterised in that the circuit also includes:Overcurrent-overvoltage module, the power supply After power supply overcurrent-overvoltage module described in enter the delay startup module, the overcurrent-overvoltage module include electric fuse, TVS pipe and Varistor, one end of the electric fuse is connected with the power supply negative pole, and the other end is by the TVS pipe and described pressure-sensitive The circuit of resistor coupled in parallel composition is connected with the power supply positive pole.
4. circuit according to claim 1, it is characterised in that the circuit also includes:Filtration module, the filtration module Between the delay startup module and DC-DC module, including an X electric capacity, the 2nd X electric capacity, the first Y capacitance, the 2nd Y electric Appearance, the 3rd Y capacitance, the 4th Y capacitance and common mode choke, are connected to an X electric between the input both positive and negative polarity of the common mode choke Hold, the first Y capacitance and the second Y capacitance, wherein the first X electric capacity and be connected in the common mode choke input both positive and negative polarity it Between, first Y capacitance is connected between the input positive pole of the common mode choke and ground, and second Y capacitance is connected on described common Between the input negative pole of mould choke coil and ground, the input positive pole of the common mode choke is connected with the power supply positive pole, institute The input negative pole for stating common mode choke is connected with the drain electrode of the metal-oxide-semiconductor;
The 2nd X electric capacity, the 3rd Y capacitance and the 4th Y capacitance are connected between the output both positive and negative polarity of the common mode choke, wherein described 2nd X electric capacity is simultaneously connected between the output both positive and negative polarity of the common mode choke, and the 3rd Y capacitance is connected on the common mode chokes Between the output cathode and ground of circle, the 4th Y capacitance is connected between the output negative pole of the common mode choke and ground, described common The output both positive and negative polarity of mould choke coil is connected respectively with the input both positive and negative polarity of the DC-DC module.
CN201611097155.7A 2016-12-02 2016-12-02 Power supply circuit of switch system CN106685192A (en)

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Application Number Priority Date Filing Date Title
CN201611097155.7A CN106685192A (en) 2016-12-02 2016-12-02 Power supply circuit of switch system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611097155.7A CN106685192A (en) 2016-12-02 2016-12-02 Power supply circuit of switch system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109842294A (en) * 2017-11-24 2019-06-04 力旺电子股份有限公司 Four-phase charge pump circuit

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CN109842294A (en) * 2017-11-24 2019-06-04 力旺电子股份有限公司 Four-phase charge pump circuit

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