CN105471242A - Novel power-on surge current suppression circuit - Google Patents
Novel power-on surge current suppression circuit Download PDFInfo
- Publication number
- CN105471242A CN105471242A CN201610004958.7A CN201610004958A CN105471242A CN 105471242 A CN105471242 A CN 105471242A CN 201610004958 A CN201610004958 A CN 201610004958A CN 105471242 A CN105471242 A CN 105471242A
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- Prior art keywords
- resistance
- surge current
- circuit
- low
- mos pipe
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Classifications
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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
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- 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
-
- 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
- H02H9/025—Current limitation using field effect transistors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The invention relates to a novel power-on surge current suppression circuit. The novel power-on surge current suppression circuit comprises a power supply circuit, a surge current suppression resistor end voltage sampling and comparison circuit, a relief resistor, a metal oxide semiconductor (MOS) transistor, a surge current suppression resistor and an optional small-capacity high-frequency filtering capacitor, wherein the power supply circuit comprises a rectification diode, an energy storage filtering capacitor and a buck voltage limitation circuit, the surge current suppression resistor end voltage sampling and comparison circuit comprises a first end voltage sampling resistor, a second end voltage sampling resistor, a reference voltage source and a comparator, a drain of the MOS transistor is connected with a DC-DC converter, a source of the MOS transistor is connected with a negative end of a rectifier bridge, a grid of the MOS transistor is connected with an output end of the power supply circuit, an input end of the power supply circuit is connected with an AC N/L end, the surge current suppression resistor is connected in parallel to the drain and the source of the MOS transistor, the relief resistor is connected in parallel to the grid and the source of the MOS transistor, and the optional small-capacity high-frequency filtering capacitor is connected between a positive end and the negative end of the rectifier bridge. With the power-on surge current suppression circuit disclosed by the application, the power-on surge current is suppressed better, the power consumption of an MOS transistor driving circuit is low, the starting speed is fast, and the power-on time allowed again is short.
Description
Technical field
The application relates to AC-DC Switching Power Supply, is specifically related to a kind of novel surge current suppression circuit that powers on, is generally applicable in the AC-DC converter of the various topological structures such as flyback, normal shock or APFC.
Background technology
In AC-DC drive circuit, alternating current is many after rectification directly or indirectly adopts bulky capacitor filtering.Powered on moment filter capacitor terminal voltage is from liter above freezing, if near the maximum being just in sinusoidal ac during start, then powered on moment just there will be the Transient Currents up to hundreds of amperes, to electrical network and the device that is connected in AC-DC converter input channel, as protective tube, industrial frequency rectifying diode and filter capacitor etc. cause serious heavy current impact.And the size of electrical surge electric current and the length of duration are determined by factors such as filter capacitor capacity, ac input circuit equivalent series resistance, input voltage instantaneous values.
For suppressing Switching Power Supply to power on surge current, prior art have employed NTC thermistor, alternating current over-zero trigger or series connection the mode such as power resistor after connecing and relay of connecting before or after the industrial frequency rectifying circuit of AC-DC converter.Although the surge current that powers on can control within the specific limits by these measures, all deposit certain defect.Such as, series connection NTC thermistor mode cost is minimum, but always flow through thermistor at normal work period AC input current, cause NTC resistance consumption power large, be in high temperature, current state for a long time, more seriously, after power-off, must wait for that NTC resistance could power on after being cooled to normal temperature state again, otherwise thermistor can lose surge current suppression effect, reduce the reliability of AC-DC converter; Alternating current zero trigger mode need use silicon controlled rectifier device, and also needs to increase accessory power supply, ac zero-crossing detection circuit, and cost is high, and circuit is complicated; Though power resistor and electromagnetic relay parallel way can solve the contradiction of power-on surge current size and converter normal work period current-limiting resistance power consumption preferably, relay attract current is large, and mechanical contact poor reliability, volume is large.
Summary of the invention
For solving the problems of the prior art, the application provides a kind of novel surge current suppression circuit that powers on, and can suppress the surge current that powers on of AC-DC Switching Power Supply better.
The novel surge current suppression circuit that powers on, it comprises power supply circuits, Inrush current restraining resistance terminal voltage sampling and comparison circuit, bleeder resistance, low on-resistance N ditch power MOS pipe, Inrush current restraining resistance and optional low capacity high-frequency filter capacitor; Power supply circuits comprise rectifier diode, energy storage filter capacitor and step-down pressure limiting circuit; Inrush current restraining resistance terminal voltage sampling and comparison circuit comprise first end voltage sampling resistor, the second terminal voltage sample resistance, reference voltage source and comparator; The drain electrode of low on-resistance N ditch power MOS pipe connects DC-DC converter or DC-DC converter primary side common potential reference point, and source electrode connects the negative terminal of rectifier bridge, and grid connects the output of step-down pressure limiting circuit; Also input filter capacitor is connected between the two ends of DC-DC converter; The two ends of surge current limiting resistance connect drain electrode and the source electrode of low on-resistance N ditch power MOS pipe respectively; The two ends of bleeder resistance connect grid and the source electrode of low on-resistance N ditch power MOS pipe respectively; The drain electrode of one termination low on-resistance N ditch power MOS pipe of first end voltage sampling resistor, the inverting input of another termination comparator; The source electrode of one termination low on-resistance N ditch power MOS pipe of the second terminal voltage sample resistance, the inverting input of another termination comparator; The negative pole of reference voltage source connects the source electrode of low on-resistance N ditch MOS, and positive pole connects the in-phase input end of comparator; The grid of the output termination low on-resistance N ditch power MOS pipe of comparator; The positive pole of rectifier diode connects the L end of AC input lines or the N end of AC input lines; The negative pole of rectifier diode connects the input of step-down pressure limiting circuit; The source electrode of one termination low on-resistance N ditch power MOS pipe of energy storage filter capacitor, the other end is connected between rectifier diode and step-down pressure limiting circuit or is connected between step-down pressure limiting circuit and low on-resistance N ditch power MOS pipe; The two ends of optional low capacity high-frequency filter capacitor connect anode and the negative terminal of rectifier bridge respectively.
Preferably, rectifier diode is provided with two, and the positive pole of two rectifier diodes connects N end and the L end of AC input lines respectively; The source electrode of one termination low on-resistance N ditch power MOS pipe of energy storage filter capacitor, the other end is connected between rectifier diode and step-down pressure limiting circuit.
Preferably, the surge current suppression circuit that powers on is applied to the APFC converter of Boost topological structure; The positive pole of rectifier diode connects the anode of AC input lines L end, N end or rectifier bridge, and the source electrode of a termination low on-resistance N ditch power MOS pipe of energy storage filter capacitor, the other end is connected between rectifier diode and step-down pressure limiting circuit.
Preferably, step-down pressure limiting circuit can be passive circuit, also can be active circuit.
Preferably, step-down pressure limiting circuit, first end voltage sampling resistor, the second terminal voltage sample resistance, reference voltage source, comparator and low on-resistance N ditch power MOS pipe can be separate components and parts, also can be the parts that a part or whole part integrates.
Preferably, surge current limiting resistance is noninductive universal power resistance or NTC thermistor.
The application has the following advantages:
(1) inhibit the surge current that powers on, and have nothing to do with bearing power; Metal-oxide-semiconductor drive circuit power consumption is low, and toggle speed is fast.
(2) allow power-on time short after power-off, because energy storage filter capacitor capacity is little, stored energy is limited, as long as bleeder resistance R3 is of moderate size, after can ensureing power-off, in 100ms, metal-oxide-semiconductor enters cut-off state again.
(3) strong adaptability, can be used in various forms of AC-DC converter.
(4) simple circuit, component number is few, and reliability is high, need not debug.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of embodiment 1;
Fig. 2 is the circuit diagram of embodiment 2;
Fig. 3 is the circuit diagram of embodiment 3.
Embodiment
By reference to the accompanying drawings the present invention is described in further detail below by embodiment.
Powered on moment, the terminal voltage of energy storage filter capacitor C2 is zero, ensure that powered on moment low on-resistance N ditch power MOS pipe 14 is in cut-off state.The terminal voltage of setting input voltage, the terminal voltage of input filter capacitor 4, Inrush current restraining resistance 15, be connected on comparator CP in-phase input end reference voltage and be respectively
,
,
,
, then powered on moment, because input filter capacitor 4 is uncharged or residual charge is little, its terminal voltage
very little, then
Comparator CP output low level, forces low on-resistance N ditch power MOS pipe 14 to be in cut-off state.Input voltage
charged by Inrush current restraining resistance 15 pairs of input filter capacitors 4, then powered on moment maximum charging current
Wherein
it is the reference voltage of reference voltage source; And equivalent series resistance
the summation of the internal resistance of AC input circuit protective tube, AC common mode filtering inductance wire resistor, rectifier diode internal resistance and wiring parasitic resistance,
be generally less than 1 Ω.
When input filter capacitor 4 terminal voltage
be elevated to preset value or rectifier bridge 2 terminal voltage
after dropping to a certain preset value, current-limiting resistance R terminal voltage meets
Then comparator CP exports high level, and the conducting of low on-resistance N ditch power MOS pipe 14 pipe, Inrush current restraining resistance 15 is bypassed.Therefore, by regulating the ratio of the terminal voltage sample resistance R1/R2 at Inrush current restraining resistance 15 two ends, make
with
when being more or less the same, triggering the conducting of low on-resistance N ditch power MOS pipe 14 pipe, just can limit the size of powered on moment surge current.
In power up, even if the storage capacitor C2 terminal voltage of power supply circuits 11
climbing speed is comparatively slow, does not also affect the inhibition of surge current.
After the conducting of low on-resistance N ditch power MOS pipe 14 pipe, Inrush current restraining resistance 15 is bypassed, due to N ditch power MOS pipe 14 pipe conducting resistance
little, therefore in normal operation, power MOS pipe power consumption is not high.
After power-off, AC-input voltage disappears, and no longer include electric current and flow through rectifier diode, energy storage filter capacitor C2 discharges, as long as circuit parameter is selected proper, after just ensureing power-off, N ditch power MOS pipe 14 is managed and entered cut-off state rapidly, and therefore power-on time is short again.
Embodiment 1:
A kind of novel surge current suppression circuit that powers on, as shown in Figure 1, it comprises power supply circuits 11, Inrush current restraining resistance terminal voltage sampling and comparison circuit 12, bleeder resistance 13, low on-resistance N ditch power MOS pipe 14, Inrush current restraining resistance 15 and optional low capacity high-frequency filter capacitor 16, wherein, surge current limiting resistance 15 can select noninductive universal power resistance or NTC thermistor.In Fig. 1, the L end of AC input lines and N termination rectifier bridge 2, also comprise DC-DC converter 3, the surge current suppression circuit that powers on just is connected between rectifier bridge 2 and DC-DC converter 3.
Power supply circuits 11 comprise rectifier diode D1, energy storage filter capacitor C2 and step-down pressure limiting circuit, and step-down pressure limiting circuit can be passive circuit, also can be active circuits; Inrush current restraining resistance terminal voltage sampling and comparison circuit 12 comprise first end voltage sampling resistor R1, the second terminal voltage sample resistance R2, reference voltage source Vref and comparator CP.
The drain electrode of low on-resistance N ditch power MOS pipe 14 connects DC-DC converter 3, and its source electrode connects the negative terminal of rectifier bridge 2, and grid connects the output of step-down pressure limiting circuit.Input filter capacitor 4 is also connected between the two ends of DC-DC converter 3.
The two ends of surge current limiting resistance 15 connect drain electrode and the source electrode of low on-resistance N ditch power MOS pipe 14 respectively; The two ends of bleeder resistance 13 connect grid and the source electrode of low on-resistance N ditch power MOS pipe 14 respectively.
The drain electrode of the one termination low on-resistance N ditch power MOS pipe 14 of first end voltage sampling resistor R1, the inverting input of another termination comparator CP; The source electrode of the one termination low on-resistance N ditch power MOS pipe 14 of the second terminal voltage sample resistance R2, the inverting input of another termination comparator CP.The negative pole of reference voltage source Vref connects the source electrode of low on-resistance N ditch power MOS pipe 14, and positive pole connects the in-phase input end of comparator CP, the grid of the output termination low on-resistance N ditch power MOS pipe 14 of comparator CP.
The positive pole of rectifier diode D1 connects the N end of AC input lines, and its negative pole connects the input of step-down pressure limiting circuit; The source electrode of the one termination low on-resistance N ditch power MOS pipe of energy storage filter capacitor C2, the other end is connected between rectifier diode D1 and step-down pressure limiting circuit.The two ends of optional low capacity high-frequency filter capacitor 16 connect anode and the negative terminal of rectifier bridge 2 respectively.
Step-down pressure limiting circuit, first end voltage sampling resistor R1, the second terminal voltage sample resistance R2, reference voltage source Vref, comparator CP and low on-resistance N ditch power MOS pipe 14 can be separate components and parts, also can be the parts that a part or whole part integrates.
In other embodiments, when being applied to concrete AC-DC Switching Power Supply, the drain electrode of low on-resistance N ditch power MOS pipe 14 also can connect the primary side common potential reference point of DC-DC converter 3.The positive pole of rectifier diode D1 also can connect the L end of AC input lines.The energy storage filter capacitor C2 other end also can be connected between step-down pressure limiting circuit and low on-resistance N ditch power MOS pipe 14.
Embodiment 2:
As shown in Figure 2, the present embodiment is compared with embodiment 1, difference is: power supply circuits 11 are provided with two rectifier diodes, in figure, rectifier diode D1 connects the L end of AC input lines, rectifier diode D2 connects the N end of AC input lines, forms full-wave rectification, can reduce the capacity of energy storage filter capacitor C2.
Embodiment 3:
As shown in Figure 3, compare with embodiment 2 with embodiment 1, the difference of the present embodiment is: the surge current suppression circuit that powers on is applied to the APFC converter of Boost topological structure.In figure, the positive pole of rectifier diode D1 connects the anode of rectifier bridge 2, and in this case, rectifier diode D1 only plays buffer action, prevents energy storage filter capacitor C2 from being discharged by DC-DC converter.In other embodiments, the positive pole of rectifier diode D1 also can connect N end or the L end of AC input lines.
Above content is in conjunction with concrete execution mode further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made.
Claims (6)
1. the novel surge current suppression circuit that powers on, is characterized in that: it comprises power supply circuits, Inrush current restraining resistance terminal voltage sampling and comparison circuit, bleeder resistance, low on-resistance N ditch power MOS pipe, Inrush current restraining resistance and optional low capacity high-frequency filter capacitor;
Power supply circuits comprise rectifier diode, energy storage filter capacitor and step-down pressure limiting circuit;
Inrush current restraining resistance terminal voltage sampling and comparison circuit comprise first end voltage sampling resistor, the second terminal voltage sample resistance, reference voltage source and comparator;
The drain electrode of low on-resistance N ditch power MOS pipe connects DC-DC converter or DC-DC converter primary side common potential reference point, and source electrode connects the negative terminal of rectifier bridge, and grid connects the output of step-down pressure limiting circuit; Also input filter capacitor is connected between the two ends of DC-DC converter;
The two ends of surge current limiting resistance connect drain electrode and the source electrode of low on-resistance N ditch power MOS pipe respectively;
The two ends of bleeder resistance connect grid and the source electrode of low on-resistance N ditch power MOS pipe respectively;
The drain electrode of one termination low on-resistance N ditch power MOS pipe of first end voltage sampling resistor, the inverting input of another termination comparator; The source electrode of one termination low on-resistance N ditch power MOS pipe of the second terminal voltage sample resistance, the inverting input of another termination comparator; The negative pole of reference voltage source connects the source electrode of low on-resistance N ditch MOS, and positive pole connects the in-phase input end of comparator; The grid of the output termination low on-resistance N ditch power MOS pipe of comparator;
The positive pole of rectifier diode connects the L end of AC input lines or the N end of AC input lines; The negative pole of rectifier diode connects the input of step-down pressure limiting circuit; The source electrode of one termination low on-resistance N ditch power MOS pipe of energy storage filter capacitor, the other end is connected between rectifier diode and step-down pressure limiting circuit or is connected between step-down pressure limiting circuit and low on-resistance N ditch power MOS pipe; The two ends of optional low capacity high-frequency filter capacitor connect anode and the negative terminal of rectifier bridge respectively.
2. the surge current suppression circuit that powers on according to claim 1, is characterized in that:
Rectifier diode is provided with two, and the positive pole of two rectifier diodes connects N end and the L end of AC input lines respectively; The source electrode of one termination low on-resistance N ditch power MOS pipe of energy storage filter capacitor, the other end is connected between rectifier diode and step-down pressure limiting circuit.
3. the surge current suppression circuit that powers on according to claim 1, is characterized in that:
The surge current suppression circuit that powers on is applied to the APFC converter of Boost topological structure; The positive pole of rectifier diode connects the anode of AC input lines L end, N end or rectifier bridge, and the source electrode of a termination low on-resistance N ditch power MOS pipe of energy storage filter capacitor, the other end is connected between rectifier diode and step-down pressure limiting circuit.
4. the surge current suppression circuit that powers on according to claim 1-3 any one, is characterized in that:
Step-down pressure limiting circuit can be passive circuit, also can be active circuit.
5. the surge current suppression circuit that powers on according to claim 1-3 any one, is characterized in that:
Described step-down pressure limiting circuit, first end voltage sampling resistor, the second terminal voltage sample resistance, reference voltage source, comparator and low on-resistance N ditch power MOS pipe can be separate components and parts, also can be the parts that a part or whole part integrates.
6. the surge current suppression circuit that powers on according to claim 1-3 any one, is characterized in that:
Surge current limiting resistance is noninductive universal power resistance or NTC thermistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610004958.7A CN105471242B (en) | 2016-01-07 | 2016-01-07 | A kind of electric surge current suppression circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610004958.7A CN105471242B (en) | 2016-01-07 | 2016-01-07 | A kind of electric surge current suppression circuit |
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| Publication Number | Publication Date |
|---|---|
| CN105471242A true CN105471242A (en) | 2016-04-06 |
| CN105471242B CN105471242B (en) | 2018-02-02 |
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|---|---|---|---|
| CN201610004958.7A Expired - Fee Related CN105471242B (en) | 2016-01-07 | 2016-01-07 | A kind of electric surge current suppression circuit |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107404222A (en) * | 2017-09-08 | 2017-11-28 | 中国船舶重工集团公司第七0四研究所 | The soft starting circuit of DC supply high-power inverter |
| CN107565528A (en) * | 2017-07-27 | 2018-01-09 | 郑州云海信息技术有限公司 | A kind of circuit structure for suppressing surge current |
| CN107800117A (en) * | 2017-12-06 | 2018-03-13 | 广东工业大学 | A kind of protection circuit against input over-voltage with upper electric Inrush current restraining function |
| CN108199568A (en) * | 2018-01-05 | 2018-06-22 | 西安电子工程研究所 | A kind of inhibition in-rush current limiting circuit |
| CN110719041A (en) * | 2018-07-13 | 2020-01-21 | 意法半导体有限公司 | Power conversion circuit with inrush current limiting resistor bypass |
| TWI721748B (en) * | 2020-01-07 | 2021-03-11 | 台達電子工業股份有限公司 | Surge current suppression circuit and power circuit having the same |
| CN112532033A (en) * | 2020-11-27 | 2021-03-19 | 江西百盈高新技术股份有限公司 | Inverter with anti-surge suppression function |
| CN112909907A (en) * | 2021-01-19 | 2021-06-04 | 索尔思光电（成都）有限公司 | Buffer circuit for inhibiting surge current and use method thereof |
| CN112993957A (en) * | 2021-03-19 | 2021-06-18 | 中国电子科技集团公司第二十九研究所 | Circuit and method for inhibiting power-on surge current of high-capacity capacitor |
| CN113162008A (en) * | 2020-01-07 | 2021-07-23 | 台达电子工业股份有限公司 | Surge current suppression circuit |
| CN113612194A (en) * | 2021-08-20 | 2021-11-05 | 苏州裕太微电子有限公司 | Surge protection circuit of Ethernet PHY chip |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107565528A (en) * | 2017-07-27 | 2018-01-09 | 郑州云海信息技术有限公司 | A kind of circuit structure for suppressing surge current |
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| CN107800117A (en) * | 2017-12-06 | 2018-03-13 | 广东工业大学 | A kind of protection circuit against input over-voltage with upper electric Inrush current restraining function |
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| CN110719041B (en) * | 2018-07-13 | 2021-10-19 | 意法半导体有限公司 | Power conversion circuit with inrush current limiting resistor bypass |
| CN110719041A (en) * | 2018-07-13 | 2020-01-21 | 意法半导体有限公司 | Power conversion circuit with inrush current limiting resistor bypass |
| TWI721748B (en) * | 2020-01-07 | 2021-03-11 | 台達電子工業股份有限公司 | Surge current suppression circuit and power circuit having the same |
| CN113162008A (en) * | 2020-01-07 | 2021-07-23 | 台达电子工业股份有限公司 | Surge current suppression circuit |
| US11190011B2 (en) | 2020-01-07 | 2021-11-30 | Delta Electronics, Inc. | Surge current suppression circuit |
| CN113162008B (en) * | 2020-01-07 | 2024-04-02 | 台达电子工业股份有限公司 | Surge current suppressing circuit |
| CN112532033B (en) * | 2020-11-27 | 2022-09-13 | 江西百盈高新技术股份有限公司 | Inverter with anti-surge suppression function |
| CN112532033A (en) * | 2020-11-27 | 2021-03-19 | 江西百盈高新技术股份有限公司 | Inverter with anti-surge suppression function |
| CN112909907A (en) * | 2021-01-19 | 2021-06-04 | 索尔思光电（成都）有限公司 | Buffer circuit for inhibiting surge current and use method thereof |
| CN112993957A (en) * | 2021-03-19 | 2021-06-18 | 中国电子科技集团公司第二十九研究所 | Circuit and method for inhibiting power-on surge current of high-capacity capacitor |
| CN112993957B (en) * | 2021-03-19 | 2023-05-09 | 中国电子科技集团公司第二十九研究所 | Circuit and method for inhibiting power-on surge current of high-capacity capacitor |
| CN113612194A (en) * | 2021-08-20 | 2021-11-05 | 苏州裕太微电子有限公司 | Surge protection circuit of Ethernet PHY chip |
| CN113612194B (en) * | 2021-08-20 | 2024-01-12 | 裕太微电子股份有限公司 | Surge protection circuit of Ethernet PHY chip |
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|---|---|
| CN105471242B (en) | 2018-02-02 |
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