CN201018407Y - Surge-suppressing circuit - Google Patents
Surge-suppressing circuit Download PDFInfo
- Publication number
- CN201018407Y CN201018407Y CNU2007200029927U CN200720002992U CN201018407Y CN 201018407 Y CN201018407 Y CN 201018407Y CN U2007200029927 U CNU2007200029927 U CN U2007200029927U CN 200720002992 U CN200720002992 U CN 200720002992U CN 201018407 Y CN201018407 Y CN 201018407Y
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- unilateral diode
- circuit
- energy storage
- diode
- series
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Abstract
The utility model relates to a circuit structure, in particular to a surge suppressing circuit for the active power factor correction circuit, which comprises an energy storage inductance L1A; wherein the energy storage inductance L1A is in series with a unilateral diode D2 and connected with a drain electrode of a high-frequency large-power MOS pipe Q1, a unilateral diode D1 is parallel with a series circuit formed by the energy storage inductance L1A and the unilateral diode D2, the unilateral diode D1, a filter capacitance C2 and a filter capacitance C1 form a whole return circuit, and the input end of the unilateral diode is in series with a negative temperature coefficient thermistance TH1. The utility model can prevent the unilateral diode D1 from being punctured in the starting moment and implement the effective protection for the circuit.
Description
Technical field
The utility model relates to a kind of circuit structure, is specially a kind of inhibition surge circuit that is applicable to APFC.
Background technology
The circuit structure of traditional APFC (APFC) as shown in Figure 1, by energy storage inductor L1A, high-frequency high-power metal-oxide-semiconductor Q1, unilateral diode D2, form a kind of boost type (BOOST) converter circuit with filter capacitor C2, wherein, energy storage inductor L1A connects with unilateral diode D2, and be connected with the drain electrode of high-frequency high-power metal-oxide-semiconductor Q1, unilateral diode D1 is in parallel with the series circuit that energy storage inductor L1A and unilateral diode D2 form, and constitutes bulk loop with filter capacitor C2 and capacitor C 1.The voltage VIN of civil power after rectification, process diode D1 is to filter capacitor C2.Because capacitor C 2 is very little in the impedance of start moment, almost is short circuit, draw according to I=U/R, when voltage U one timing, resistance R is more little, and electric current I is just big more.Therefore the electric current in whole loop is very big, causes diode D1 to puncture easily.
Summary of the invention
The purpose of this utility model is starting shooting moment at existing APFC, and diode D1 is breakdown defective easily, and a kind of inhibition surge circuit is provided, thereby the moment diode D1 that prevents to start shooting punctures, and circuit is implemented effectively to protect.
The technical solution of the utility model is as follows: a kind of inhibition surge circuit, comprise energy storage inductor L1A, energy storage inductor L1A connects with unilateral diode D2, and be connected with the drain electrode of high-frequency high-power metal-oxide-semiconductor Q1, unilateral diode D1 is in parallel with the series circuit that energy storage inductor L1A and unilateral diode D2 form, and constituting bulk loop with filter capacitor C2 and capacitor C 1, its characteristics are, at negative tempperature coefficient thermistor TH1 of input series connection of unilateral diode.
The utility model thermistor TH1 that connects in the loop of diode D1 as the voltage VIN of civil power after rectification, flows to C2 through TH1 and D1, starting shooting moment, the impedance of thermistor TH1 is very big, draws according to I=U/R, when voltage U one timing, resistance R is big more, and electric current I is just more little.Therefore the electric current in whole loop is very little, can protect diode D1.
Description of drawings
Fig. 1 is the structure chart of traditional APFC.
Fig. 2 is a circuit structure diagram of the present utility model.
Fig. 3 is the relation of temperature characteristics and the temperature coefficient α of negative tempperature coefficient thermistor TH1.
Embodiment
As shown in Figure 2, inhibition surge circuit provided by the utility model comprises energy storage inductor L1A, energy storage inductor L1A connects with unilateral diode D2, and be connected with the drain electrode of high-frequency high-power metal-oxide-semiconductor Q1, unilateral diode D1 is in parallel with the series circuit that energy storage inductor L1A and unilateral diode D2 form, and constitute bulk loop with filter capacitor C2 and capacitor C 1, at negative tempperature coefficient thermistor TH1 of input series connection of unilateral diode.As the voltage VIN of civil power after rectification, flow to C2 through TH1 and D1, to start shooting moment, the impedance of thermistor TH1 is very big, and therefore the electric current in whole loop is very little, can protect diode D1.
Fig. 3 has represented the relation of temperature characteristics and the temperature coefficient α of negative tempperature coefficient thermistor TH1.When the Power Supply Unit switch opens, be exactly the resistance value of resistive element via the resistance value that exchanges on the line source, so just can reach the purpose of restriction burst current.When capacitor began to charge, electric current began the thermal resistor of flowing through, and this moment, thermal resistor just had the generation of heating phenomenon, because thermal resistor itself has the characteristic of negative temperature coefficient, so along with the rising resistance of temperature descends.
Claims (1)
1. one kind is suppressed the surge circuit, comprise energy storage inductor L1A, energy storage inductor L1A connects with unilateral diode D2, and be connected with the drain electrode of high-frequency high-power metal-oxide-semiconductor Q1, unilateral diode D1 is in parallel with the series circuit that energy storage inductor L1A and unilateral diode D2 form, and constitute bulk loop with filter capacitor C2 and capacitor C 1, it is characterized in that: at negative tempperature coefficient thermistor TH1 of input series connection of unilateral diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200029927U CN201018407Y (en) | 2007-02-02 | 2007-02-02 | Surge-suppressing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200029927U CN201018407Y (en) | 2007-02-02 | 2007-02-02 | Surge-suppressing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201018407Y true CN201018407Y (en) | 2008-02-06 |
Family
ID=39058907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200029927U Expired - Fee Related CN201018407Y (en) | 2007-02-02 | 2007-02-02 | Surge-suppressing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201018407Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101651271B (en) * | 2008-08-11 | 2012-08-29 | 深圳市伟力盛世节能科技有限公司 | Lightning-proof electricity-saving protection circuit in single-phase socket |
| CN101609941B (en) * | 2009-07-23 | 2012-09-05 | 深圳市伟力盛世节能科技有限公司 | Single phase intelligent electricity-saving protection control socket |
| CN103475200A (en) * | 2013-08-27 | 2013-12-25 | 崧顺电子（深圳）有限公司 | Anti-surge circuit |
| CN108418409A (en) * | 2018-03-19 | 2018-08-17 | 青岛大学 | Cache peak voltage switching tube and the Switching Power Supply topology with the switching tube |
-
2007
- 2007-02-02 CN CNU2007200029927U patent/CN201018407Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101651271B (en) * | 2008-08-11 | 2012-08-29 | 深圳市伟力盛世节能科技有限公司 | Lightning-proof electricity-saving protection circuit in single-phase socket |
| CN101609941B (en) * | 2009-07-23 | 2012-09-05 | 深圳市伟力盛世节能科技有限公司 | Single phase intelligent electricity-saving protection control socket |
| CN103475200A (en) * | 2013-08-27 | 2013-12-25 | 崧顺电子（深圳）有限公司 | Anti-surge circuit |
| CN108418409A (en) * | 2018-03-19 | 2018-08-17 | 青岛大学 | Cache peak voltage switching tube and the Switching Power Supply topology with the switching tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080206 Termination date: 20120202 |