CN2882068Y - Switch power supply burp protection circuit - Google Patents
Switch power supply burp protection circuit Download PDFInfo
- Publication number
- CN2882068Y CN2882068Y CN 200620000754 CN200620000754U CN2882068Y CN 2882068 Y CN2882068 Y CN 2882068Y CN 200620000754 CN200620000754 CN 200620000754 CN 200620000754 U CN200620000754 U CN 200620000754U CN 2882068 Y CN2882068 Y CN 2882068Y
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- CN
- China
- Prior art keywords
- circuit
- power supply
- output
- hiccups
- protective circuit
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- 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.)
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Abstract
The utility model discloses a blech protective circuit for switch power supply, and a primary-side controlled blech protective circuit and a secondary-side controlled blech protective circuit using the blech protective circuit. All the circuits comprise comparison circuits, drive circuits and PWM circuits. A comparator is used to monitor the output voltage. When output is over current, as the peak current of the primary side limits the output voltage, when the output voltage drops to certain value, the output signal of the comparator will turn off PWM signals. The utility model can prevent the output current of a switch power supply from trailing, and the protected point is settable. An optical coupling that is used for over voltage protection is used to transmit the off signals, the circuit is simple, the power load capacity is high, the consumed power for the protection is low, and the reliability is high.
Description
Technical field
The utility model relates to a kind of protective circuit of switch power source, specifically, relates to a kind of output overcurrent protective circuit of Switching Power Supply.
Background technology
At present; in the known prior art; adopt in the Switching Power Supply of peak current control model; the main peak current limit function of control chip that relies on realizes overcurrent protection; because output current constantly strengthened with the reduction of output voltage when the time-delay of control circuit caused overcurrent, form conditions of streaking, as shown in Figure 1; circuit stress is strengthened, reduced the reliability of power supply.
The utility model content
A kind of current foldback circuit that can recover automatically that the utility model designs in order to solve the problems of the technologies described above just, output current constantly strengthens with the reduction of output voltage in the time of can preventing to adopt the Switching Power Supply overcurrent of peak current control model.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of Switching Power Supply protective circuit of having the hiccups comprises comparison circuit, drive circuit and pwm circuit; It is characterized in that: comparison circuit is made of comparator U1 and peripheral circuit, out-put supply V
OUTProvide signal by resistance R 5, R2 and capacitor C 2 for the anodal input of comparator U1, input power supply V
CCProvide signal, capacitor C 4 to be serially connected between U1 electrode input end and the resistance R 6 by resistance R 6, R4, capacitor C 3 and voltage stabilizing didoe V1 for the input of comparator U1 negative pole, comparator U1 output connects drive circuit, drive circuit output cut-off signals I
Signal, I
SignalLink to each other with the control end of pwm circuit.
A kind of Switching Power Supply former limit control overcurrent of protective circuit protective circuit of having the hiccups of having the hiccups of using comprises the Switching Power Supply protective circuit of having the hiccups; It is characterized in that: drive circuit is light lotus root chip U2, the anodal outer meeting resistance R1 of U2 interior light emitting diodes, the external diode V2 of negative pole positive pole; Diode V2 positive pole also links to each other with the positive pole of diode V3 simultaneously, and the V2 negative pole links to each other with comparator U1 output, the negative pole of diode V3 and output overvoltage signal U
LimitLink to each other; The inner photosensitive transistor collector output of light lotus root chip U2 cut-off signals I
Signal, I
SignalLink to each other with the control end of pwm circuit.
A kind of Switching Power Supply secondary control overcurrent of protective circuit protective circuit of having the hiccups of having the hiccups of using comprises the Switching Power Supply protective circuit of having the hiccups; It is characterized in that: drive circuit is diode V2, and diode V2 negative pole and Switching Power Supply are had the hiccups, and comparator U1 output links to each other the anodal output of diode V2 cut-off signals I in the protective circuit
Signal, I
SignalLink to each other with the control end of pwm circuit.
Operation principle is: utilize comparator monitoring output voltage, when the peak current limit output voltage on during output overcurrent because former limit dropped to certain value, comparator output signal turn-offed pwm signal, prevented the output current hangover; Utilize overvoltage protection light lotus root to transmit the shutoff pwm signal in isolating output translator, circuit is simple, the reliability height.During start, VCC sets up, because the existence of capacitor C 4, comparator U1 is output as high level, the converter normal boot-strap; When overcurrent appearred in output, the Pulse by Pulse current limliting on former limit made output voltage V
OUTDescend, drop at output voltage under the situation of certain value, comparator U1 output will be reversed output low level, light lotus root U2 conducting.By the output that light lotus root U2 turn-offs front end PWM chip, make power supply output " having the hiccups " occur.
The beneficial effects of the utility model are to prevent the switch power supply output current hangover, and the protection point can be set, and utilizes overvoltage protection to use the light lotus root to transmit cut-off signals, and circuit is simple, and the power source loads ability is strong, and the protection dissipation power is little, the reliability height.
Description of drawings
Fig. 1 is the switch power source output voltage and the current relationship schematic diagram of peak current control model.
Fig. 2 is the overcurrent provided by the utility model protective circuit figure that has the hiccups.
Fig. 3 is control overcurrent in the former limit provided by the utility model protective circuit figure that has the hiccups.
Fig. 4 is the secondary provided by the utility model control overcurrent protective circuit figure that has the hiccups.
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
As shown in Figure 2, a kind of Switching Power Supply protective circuit of having the hiccups comprises comparison circuit, drive circuit and pwm circuit.Comparison circuit is made of comparator U1 and peripheral circuit, out-put supply V
OUTProvide signal by resistance R 5, R2 and capacitor C 2 for the anodal input of comparator U1, input power supply V
CCProvide signal, capacitor C 4 to be serially connected between U1 electrode input end and the resistance R 6 by resistance R 6, R4, capacitor C 3 and voltage stabilizing didoe V1 for the input of comparator U1 negative pole, comparator U1 output connects drive circuit, drive circuit output cut-off signals I
Signal, I
SignalLink to each other with the control end of pwm circuit.
As shown in Figure 3, a kind of Switching Power Supply former limit control overcurrent of protective circuit protective circuit of having the hiccups of having the hiccups of using comprises the Switching Power Supply protective circuit of having the hiccups.Drive circuit is light lotus root chip U2, the anodal outer meeting resistance R1 of U2 interior light emitting diodes, the external diode V2 of negative pole positive pole; Diode V2 positive pole also links to each other with the positive pole of diode V3 simultaneously, and the V2 negative pole links to each other with comparator U1 output, the negative pole of diode V3 and output overvoltage signal I
LimitLink to each other; The inner photosensitive transistor collector output of light lotus root chip U2 cut-off signals I
Signal, I
SignalLink to each other with the control end of pwm circuit.
As shown in Figure 4, a kind of Switching Power Supply secondary control overcurrent of protective circuit protective circuit of having the hiccups of having the hiccups of using comprises the Switching Power Supply protective circuit of having the hiccups.Drive circuit is diode V2, and diode V2 negative pole and Switching Power Supply are had the hiccups, and comparator U1 output links to each other the anodal output of diode V2 cut-off signals I in the protective circuit
Signal, I
SignalLink to each other with the control end of pwm circuit.
Claims (3)
1, a kind of Switching Power Supply protective circuit of having the hiccups comprises comparison circuit, drive circuit and pwm circuit; It is characterized in that: comparison circuit is made of comparator U1 and peripheral circuit, out-put supply V
OUTProvide signal by resistance R 5, R2 and capacitor C 2 for the anodal input of comparator U1, input power supply V
CCProvide signal, capacitor C 4 to be serially connected between U1 electrode input end and the resistance R 6 by resistance R 6, R4, capacitor C 3 and voltage stabilizing didoe V1 for the input of comparator U1 negative pole, comparator U1 output connects drive circuit, drive circuit output cut-off signals I
Signal, I
SignalLink to each other with the control end of pwm circuit.
2, a kind of described Switching Power Supply of the claim 1 former limit control overcurrent of protective circuit protective circuit of having the hiccups of having the hiccups of using comprises the Switching Power Supply protective circuit of having the hiccups; It is characterized in that: drive circuit is light lotus root chip U2, the anodal outer meeting resistance R1 of U2 interior light emitting diodes, the external diode V2 of negative pole positive pole; Diode V2 positive pole also links to each other with the positive pole of diode V3 simultaneously, and the V2 negative pole links to each other with comparator U1 output, the negative pole of diode V3 and output overvoltage signal U
LimitLink to each other; The inner photosensitive transistor collector output of light lotus root chip U2 cut-off signals I
Signal, I
SignalLink to each other with the control end of pwm circuit.
3, a kind of described Switching Power Supply of the claim 1 secondary control overcurrent of protective circuit protective circuit of having the hiccups of having the hiccups of using comprises the Switching Power Supply protective circuit of having the hiccups; It is characterized in that: drive circuit is diode V2, and diode V2 negative pole and Switching Power Supply are had the hiccups, and comparator U1 output links to each other the anodal output of diode V2 cut-off signals I in the protective circuit
Signal, I
SignalLink to each other with the control end of pwm circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620000754 CN2882068Y (en) | 2006-01-13 | 2006-01-13 | Switch power supply burp protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620000754 CN2882068Y (en) | 2006-01-13 | 2006-01-13 | Switch power supply burp protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2882068Y true CN2882068Y (en) | 2007-03-21 |
Family
ID=37881910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620000754 Expired - Fee Related CN2882068Y (en) | 2006-01-13 | 2006-01-13 | Switch power supply burp protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2882068Y (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008122189A1 (en) * | 2007-04-06 | 2008-10-16 | Mornsun Guangzhou Science & Technology Ltd. | An output protection circuit for a power supply converter |
| CN102193509A (en) * | 2010-03-01 | 2011-09-21 | 株式会社村田制作所 | Switching control circuit and switching power supply device |
| CN102969883A (en) * | 2012-12-07 | 2013-03-13 | 深圳市核达中远通电源技术有限公司 | Switching power supply burp protection and delay protection circuit |
| CN103248235A (en) * | 2012-02-10 | 2013-08-14 | 汤姆森特许公司 | Switch mode power supply module and associated hiccup control method |
| US8547189B2 (en) | 2011-02-16 | 2013-10-01 | Murata Manufacturing Co., Ltd. | Electronic component |
| CN103746559A (en) * | 2012-11-23 | 2014-04-23 | 安徽省智纯动力科技有限公司 | Large-power DC controller possessing active and passive safety protection functions |
| WO2015070492A1 (en) * | 2013-11-13 | 2015-05-21 | 深圳市东方之星电源有限公司 | Open-loop hiccup protective circuit of constant-current power supply |
| CN108988298A (en) * | 2018-08-29 | 2018-12-11 | 广州金升阳科技有限公司 | A kind of overtemperature and overcurrent protection circuit and the Switching Power Supply comprising the circuit |
| CN109088396A (en) * | 2018-08-29 | 2018-12-25 | 广州金升阳科技有限公司 | A kind of current foldback circuit and the Switching Power Supply comprising the circuit |
| CN110867836A (en) * | 2019-11-29 | 2020-03-06 | 北京无线电测量研究所 | Power module hiccup protection circuit |
-
2006
- 2006-01-13 CN CN 200620000754 patent/CN2882068Y/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008122189A1 (en) * | 2007-04-06 | 2008-10-16 | Mornsun Guangzhou Science & Technology Ltd. | An output protection circuit for a power supply converter |
| CN102193509A (en) * | 2010-03-01 | 2011-09-21 | 株式会社村田制作所 | Switching control circuit and switching power supply device |
| CN102193509B (en) * | 2010-03-01 | 2013-08-14 | 株式会社村田制作所 | Switching control circuit and switching power supply device |
| US8547189B2 (en) | 2011-02-16 | 2013-10-01 | Murata Manufacturing Co., Ltd. | Electronic component |
| US9444345B2 (en) | 2012-02-10 | 2016-09-13 | Thomson Licensing | Switch mode power supply module and associated hiccup control method |
| CN103248235A (en) * | 2012-02-10 | 2013-08-14 | 汤姆森特许公司 | Switch mode power supply module and associated hiccup control method |
| CN103248235B (en) * | 2012-02-10 | 2017-09-26 | 汤姆森特许公司 | Switched-mode power supply module and associated hiccup control method |
| CN103746559A (en) * | 2012-11-23 | 2014-04-23 | 安徽省智纯动力科技有限公司 | Large-power DC controller possessing active and passive safety protection functions |
| CN102969883B (en) * | 2012-12-07 | 2016-05-04 | 深圳市核达中远通电源技术有限公司 | A kind of Switching Power Supply hiccup protections and delay protection circuit |
| CN102969883A (en) * | 2012-12-07 | 2013-03-13 | 深圳市核达中远通电源技术有限公司 | Switching power supply burp protection and delay protection circuit |
| WO2015070492A1 (en) * | 2013-11-13 | 2015-05-21 | 深圳市东方之星电源有限公司 | Open-loop hiccup protective circuit of constant-current power supply |
| CN108988298A (en) * | 2018-08-29 | 2018-12-11 | 广州金升阳科技有限公司 | A kind of overtemperature and overcurrent protection circuit and the Switching Power Supply comprising the circuit |
| CN109088396A (en) * | 2018-08-29 | 2018-12-25 | 广州金升阳科技有限公司 | A kind of current foldback circuit and the Switching Power Supply comprising the circuit |
| CN110867836A (en) * | 2019-11-29 | 2020-03-06 | 北京无线电测量研究所 | Power module hiccup protection circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING DI SAICH TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: BEIJING DONGLIYUAN TECHNOLOGY CO.,LTD. Effective date: 20080523 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080523 Address after: Room 8, Spark Road, No. 411, Fengtai District Science City, Beijing, China: 100070 Patentee after: Beijing Design Technology Co., Ltd. Address before: No. 8, Spark Road, Fengtai District Science City, Beijing, China: 100070 Patentee before: Beijing Power Producer Science and Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070321 Termination date: 20150113 |
|
| EXPY | Termination of patent right or utility model |