CN105429120A - Surge current suppression circuit - Google Patents
Surge current suppression circuit Download PDFInfo
- Publication number
- CN105429120A CN105429120A CN201510811650.9A CN201510811650A CN105429120A CN 105429120 A CN105429120 A CN 105429120A CN 201510811650 A CN201510811650 A CN 201510811650A CN 105429120 A CN105429120 A CN 105429120A
- Authority
- CN
- China
- Prior art keywords
- diode
- electric capacity
- resistance
- surge current
- suppression circuit
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The present invention discloses a surge current suppression circuit. The surge current suppression circuit comprises a rectifier bridge BD, a resistor R2, a capacitor C1 and a DC/DC converter, wherein a port 2 of the rectifier bridge BD is connected to the resistor R2, the capacitor C1 and the DC/DC converter; the other end of the resistor R2 is connected to a resistor R3, a capacitor C4, a cathode of a diode ZD1, a grid of an MOS tube Q1 and the cathode of the diode ZD1; and the other end of the resistor R3 is connected to a resistor R1, the other end of the capacitor C4, an anode of the diode ZD1, a source of the MOS tube Q1 and a port 4 of the rectifier bridge BD. The surge current suppression circuit disclosed by the present invention has the following advantages: 1, the circuit is simple; 2, the application range of an MOSFET is broadened (along with the technical development of the MOSFET, the volume of the MOSFET is smaller and smaller, and the application range of the MOSFET is further broadened); and 3 the miniaturization of the overall product volume is achieved.
Description
Technical field
The present invention relates to a kind of suppression circuit, particularly relate to a kind of surge current suppression circuit.
Background technology
Surge current refers to that power supply connects moment, flows into the peak current of power-supply device.Because input filter capacitor charges rapidly, so this peak current is far longer than stable state input current.The surge levels that power supply should limit AC switch, rectifier bridge, fuse, electromagnetic interface filter part can bear.Switch loop repeatedly, ac input voltage should not damage power supply or cause blowout.Surge current also refers to that the junction temperature that makes caused due to circuit abnormality situation exceedes the not repeated maximum forward overload current of rated junction temperature, therefore surge current needs to carry out the accuracy that suppresses just to guarantee circuit, surge current suppression circuit conventional at present uses resistance to suppress or relay construction mostly, these modes can produce larger loss or larger volume, and circuit is complicated, therefore needs to be improved.
Summary of the invention
The object of this invention is to provide a kind of surge current suppression circuit, solve the problem mentioned in above-mentioned background.
For achieving the above object, the invention provides following technical scheme:
A kind of surge current suppression circuit, comprise rectifier bridge BD, resistance R2, electric capacity C1 and DC/DC transducer, the port 2 contact resistance R2 of described rectifier bridge BD, electric capacity C1 and DC/DC transducer, the other end contact resistance R3 of resistance R2, electric capacity C4, the negative electrode of diode ZD1, the negative electrode of the good diode ZD1 of grid of metal-oxide-semiconductor Q1, the other end contact resistance R1 of resistance R3, the other end of electric capacity C4, the anode of diode ZD1, the source electrode of metal-oxide-semiconductor Q1 and the port 4 of rectifier bridge BD, the drain electrode of metal-oxide-semiconductor Q1 connects the other end of electric capacity C1, the other end of resistance R1 and DC/DC transducer, DC/DC transducer also connects PWM chip, PWM chip also connects the anode of diode D2, the negative electrode of diode D2 connects anode and the electric capacity C5 of diode ZD1, the other end ground connection of electric capacity C5.
As preferred version of the present invention: the port one of described rectification BD is connected 220V alternating current by transformer NF with fuse FUSE.
Compared with prior art, the invention has the beneficial effects as follows: the present invention has the following advantages: 1, circuit is simple, 2, (along with the technical development of MOSFET, the volume of MOSFET is more and more less to widen the range of application of MOSFET, for MOSFET), 3, realize small product size miniaturization.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present invention;
Fig. 2 is the circuit diagram of prior art resistor-type surge current suppression circuit;
Fig. 3 is the circuit diagram of prior art relay-type surge current suppression circuit;
Fig. 4 is working timing figure of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1 ~ 4, a kind of surge current suppression circuit, comprise rectifier bridge BD, resistance R2, electric capacity C1 and DC/DC transducer, the port 2 contact resistance R2 of described rectifier bridge BD, electric capacity C1 and DC/DC transducer, the other end contact resistance R3 of resistance R2, electric capacity C4, the negative electrode of diode ZD1, the negative electrode of the good diode ZD1 of grid of metal-oxide-semiconductor Q1, the other end contact resistance R1 of resistance R3, the other end of electric capacity C4, the anode of diode ZD1, the source electrode of metal-oxide-semiconductor Q1 and the port 4 of rectifier bridge BD, the drain electrode of metal-oxide-semiconductor Q1 connects the other end of electric capacity C1, the other end of resistance R1 and DC/DC transducer, DC/DC transducer also connects PWM chip, PWM chip also connects the anode of diode D2, the negative electrode of diode D2 connects anode and the electric capacity C5 of diode ZD1, the other end ground connection of electric capacity C5.
The port one of rectification BD is connected 220V alternating current by transformer NF with fuse FUSE.
Operation principle of the present invention is: principle and the shortcoming of prior art are as follows: a series connection resistance R4 between the positive pole of BD and electric capacity C1 positive pole piled by bridge by Fig. 2 in circuit, the moment powered on, high pressure after the rectification of bridge heap is charged to C1 by resistance R4, the current value of whole like this circuit is: I=Vin/R4, can take a fancy to from formula, the resistance of R4 is larger, the current value produced instantaneously is less, so just inhibit the effect of surge current, the shortcoming of this circuit is that circuit is when just working, R4 there is electric current flow through, so produce larger loss.
Improve in the principle of Fig. 2 in Fig. 3, at 2 ends of a R4 relay in parallel, when the voltage on electric capacity C1 charges to 300V by 0V by R4, send instruction by testing circuit, drive the coil of relay to start working, the switch being connected in parallel on R4 two ends is closed, on R4, just do not have loss to produce during so normal work, but the shortcoming of this circuit is: 1, when product work, need to power to relay constantly, consumed energy.2, relay volume is comparatively large, takies the volume that product is larger.3, peripheral circuit is comparatively complicated.
The components and parts of the surge current suppression in circuit of the present invention are R1 and Fig. 2, R4 in Fig. 3 is identical, the positive pole of the positive pole and C1 that are not both bridge heap is connected, negative pole is the negative pole being attached to C1 by resistance R1, a MOSFET in parallel at the two ends of R1, the G pole of MOSFET and resistance R2, R3 series connection dividing potential drop are connected.G pole, a S electric capacity C4 and voltage stabilizing didoe (DZ1=12V) extremely in parallel, link again voltage stabilizing didoe DZ2 to a B point in G pole.A series connection diode between the control pin of PWM chip and B point, this control mode is high level PMW chip operation, and low level PWM chip does not work.Electric capacity C5 plays the effect of soft start.
The t0 moment, product connects 220VAC alternating current, after becoming 300VDC direct current after bridge heap BD rectification, charged to C1 by R1, simultaneously R2 and R3 dividing potential drop obtains a voltage and charges to C4, to the t1 moment, when the voltage of A point reaches DZ2 value, now the G pole tension of MOSFET reaches the requirement of opening MOSFET, MOSFET starts conducting, by R1 two terminal shortcircuit, so just avoid the generation of moment surge current, now DC/DC transducer below does not also reach the condition of work, charged to C5 by the leakage current of DZ2, the t2 moment, when the voltage of C5 is charged to high level=VD5+Vcotrol, PWM chip is started working, DC/DC transducer is driven to start working.The detailed See Figure 4 of concrete sequential.
Claims (2)
1. a surge current suppression circuit, comprise rectifier bridge BD, resistance R2, electric capacity C1 and DC/DC transducer, it is characterized in that, the port 2 contact resistance R2 of described rectifier bridge BD, electric capacity C1 and DC/DC transducer, the other end contact resistance R3 of resistance R2, electric capacity C4, the negative electrode of diode ZD1, the negative electrode of the good diode ZD1 of grid of metal-oxide-semiconductor Q1, the other end contact resistance R1 of resistance R3, the other end of electric capacity C4, the anode of diode ZD1, the source electrode of metal-oxide-semiconductor Q1 and the port 4 of rectifier bridge BD, the drain electrode of metal-oxide-semiconductor Q1 connects the other end of electric capacity C1, the other end of resistance R1 and DC/DC transducer, DC/DC transducer also connects PWM chip, PWM chip also connects the anode of diode D2, the negative electrode of diode D2 connects anode and the electric capacity C5 of diode ZD1, the other end ground connection of electric capacity C5.
2. a kind of surge current suppression circuit according to claim 1, is characterized in that, the port one of described rectification BD is connected 220V alternating current by common mode inductance NF with fuse FUSE.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510811650.9A CN105429120A (en) | 2015-11-19 | 2015-11-19 | Surge current suppression circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510811650.9A CN105429120A (en) | 2015-11-19 | 2015-11-19 | Surge current suppression circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105429120A true CN105429120A (en) | 2016-03-23 |
Family
ID=55507138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510811650.9A Pending CN105429120A (en) | 2015-11-19 | 2015-11-19 | Surge current suppression circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105429120A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106329956A (en) * | 2016-10-21 | 2017-01-11 | 福建星海通信科技有限公司 | Vehicle input adaptive voltage-limiting protective circuit |
| CN111082648A (en) * | 2019-12-30 | 2020-04-28 | 联想(北京)有限公司 | Surge suppression circuit and adapter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201910735U (en) * | 2011-01-10 | 2011-07-27 | 福建捷联电子有限公司 | Circuit capable of suppressing starting instant impulse current of display switching power supply |
| CN102231511A (en) * | 2011-04-11 | 2011-11-02 | 深圳桑达国际电子器件有限公司 | LED drive circuit and short-circuit protection circuit thereof |
| CN102956110A (en) * | 2011-08-19 | 2013-03-06 | 中国长城计算机深圳股份有限公司 | LED traffic signal lamp and drive circuit thereof |
| CN103501108A (en) * | 2013-10-24 | 2014-01-08 | 深圳威迈斯电源有限公司 | Striking prevention protection circuit for high-voltage direct current power supply circuit and realization method of striking prevention protection circuit |
| CN204013236U (en) * | 2014-05-29 | 2014-12-10 | 深圳欧陆通电子有限公司 | A kind of DC power supply circuit |
-
2015
- 2015-11-19 CN CN201510811650.9A patent/CN105429120A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201910735U (en) * | 2011-01-10 | 2011-07-27 | 福建捷联电子有限公司 | Circuit capable of suppressing starting instant impulse current of display switching power supply |
| CN102231511A (en) * | 2011-04-11 | 2011-11-02 | 深圳桑达国际电子器件有限公司 | LED drive circuit and short-circuit protection circuit thereof |
| CN102956110A (en) * | 2011-08-19 | 2013-03-06 | 中国长城计算机深圳股份有限公司 | LED traffic signal lamp and drive circuit thereof |
| CN103501108A (en) * | 2013-10-24 | 2014-01-08 | 深圳威迈斯电源有限公司 | Striking prevention protection circuit for high-voltage direct current power supply circuit and realization method of striking prevention protection circuit |
| CN204013236U (en) * | 2014-05-29 | 2014-12-10 | 深圳欧陆通电子有限公司 | A kind of DC power supply circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106329956A (en) * | 2016-10-21 | 2017-01-11 | 福建星海通信科技有限公司 | Vehicle input adaptive voltage-limiting protective circuit |
| CN111082648A (en) * | 2019-12-30 | 2020-04-28 | 联想(北京)有限公司 | Surge suppression circuit and adapter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101964586B (en) | Inrush current control | |
| CN104836419B (en) | Switching Power Supply driving chip power supply circuit with under-voltage detection function | |
| CN101674025A (en) | Multiplexed output auxiliary switch power source powered by commercial power and battery | |
| CN103841702A (en) | LED drive circuit and LED drive method | |
| CN104507227A (en) | Transformer-free constant current power circuit | |
| CN103152928A (en) | Load overvoltage protection circuit and control method thereof | |
| CN205544520U (en) | Automatic energy -conserving charging circuit of pressure regulating | |
| CN105429120A (en) | Surge current suppression circuit | |
| CN202333942U (en) | Charging circuit | |
| CN204271907U (en) | A kind of soft starting circuit for APFC converter | |
| CN201611842U (en) | Multichannel auxiliary switch power powered by commercial power and batteries | |
| CN205793510U (en) | A kind of AC LED circuit | |
| CN216390802U (en) | Switching power supply circuit of ammeter | |
| CN106304517A (en) | A kind of super wide voltage constant current Universal LED lamp drive circuit | |
| CN103441672A (en) | Self-excitation BUCK circuit based on auxiliary winding sampling circuit | |
| CN203788205U (en) | Drive circuit without added driving power supplies | |
| CN103607110B (en) | A kind of quick opening switch power supply of auxiliary winding power | |
| CN209151406U (en) | The protection circuit of low ripple LED control device | |
| CN204119070U (en) | A kind of switching power circuit | |
| CN204290764U (en) | A kind of voltage commutation power circuit | |
| CN104253546A (en) | Switching power supply circuit | |
| CN204068738U (en) | A kind of doubleway output formula precision switch power supply | |
| CN202678955U (en) | Device preventing power supply from being restarted during a lightning stroke | |
| CN203761284U (en) | Low-power step-down circuit | |
| CN203872072U (en) | Multiple-output switching DC stabilized power supply with simple circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160323 |