CN202889187U - AN oblique wave compensating circuit of a current mode switching power supply - Google Patents
AN oblique wave compensating circuit of a current mode switching power supply Download PDFInfo
- Publication number
- CN202889187U CN202889187U CN2012204958340U CN201220495834U CN202889187U CN 202889187 U CN202889187 U CN 202889187U CN 2012204958340 U CN2012204958340 U CN 2012204958340U CN 201220495834 U CN201220495834 U CN 201220495834U CN 202889187 U CN202889187 U CN 202889187U
- Authority
- CN
- China
- Prior art keywords
- capacitor
- power supply
- transistor
- circuit
- compensating 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.)
- Expired - Fee Related
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Amplifiers (AREA)
Abstract
The utility model relates to an oblique wave compensating circuit of a current mode switching power supply. The oblique wave compensating circuit stabilizes the output waveform of a transformer and protects a power supply. The oblique wave compensating circuit comprises a circuit to be compensated, a comparator IC2, and a compensating circuit. The compensating circuit comprises a resistor R1, a capacitor C1, and a transistor IC1. One end of the resistor R1 is connected with voltage while the other end of the resistor R1 is connected with the capacitor C1. One end of the capacitor C1 is connected with the resistor R1, while the other end of the capacitor C1 is connected with the circuit to be compensated. The transistor IC1 is connected with two ends of the capacitor C1. The comparator IC2 is connected with the transistor IC1.
Description
Technical field
The utility model relates to a kind of oblique wave compensation circuit of current mode switch power supply.
Background technology
General in the current mode switch power supply of H bridge-type, can get the main circuit current sample by magnet ring of series connection on the primary, the DC level that the voltage that resistance R obtains is delivered to comparator and setting compares, if the DC level gradient of the voltage that resistance R obtains and setting is little, will cause the comparator upset, the transformer secondary output output waveform is just unstable, and power supply can emit a shrill cry simultaneously.
The utility model content
For solving the problems of the technologies described above, the utility model provides a kind of stabilizing transformer output waveform, the oblique wave compensation circuit of the current mode switch power supply of protection power source.
The oblique wave compensation circuit of current mode switch power supply of the present utility model, comprise circuit to be compensated, comparator IC2, compensating circuit, compensating circuit comprise resistance R 1, capacitor C 1 and transistor I C1, resistance R 1 one termination voltages, another termination capacitor C 1, a terminating resistor R1 of capacitor C 1, the other end is connected with circuit to be compensated, transistor I C1 is connected on the two ends of capacitor C 1, and comparator IC2 is connected with transistor I C1.
Compared with prior art the beneficial effects of the utility model are:
The oblique wave compensation circuit of current mode switch power supply of the present utility model, when H bridge power tube drives conducting, add a low level at the G of transistor I C1 end, the G of transistor I C1 holds not conducting, 1 charging of 1 pair of capacitor C of resistance R, capacitor C 1 voltage constantly rises, like this, the voltage gradient of delivering to comparator IC2 has just increased, and comparator IC2 just can disorderly not overturn, power supply output is also just stable, when driving, add a high level at the G of transistor I C1 end, the G end conducting of transistor I C1 at H bridge power tube, the voltage of capacitor C 1 is 0, waits for next circulation.
Description of drawings
Fig. 1 is the circuit diagram of integrated circuit of the oblique wave compensation circuit of current mode switch power supply of the present utility model;
Fig. 2 is the circuit diagram of circuit to be compensated of the oblique wave compensation circuit of current mode switch power supply of the present utility model;
Fig. 3 is the circuit diagram of compensating circuit of the oblique wave compensation circuit of current mode switch power supply of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples are used for explanation the utility model, but are not used for limiting scope of the present utility model.
Such as Fig. 1, Fig. 2 and shown in Figure 3, comprise circuit to be compensated 1, comparator IC2, compensating circuit 2, compensating circuit 2 comprise resistance R 1, capacitor C 1 and transistor I C1, resistance R 1 one termination voltages, another termination capacitor C 1, a terminating resistor R1 of capacitor C 1, the other end is connected with circuit 1 to be compensated, transistor I C1 is connected on the two ends of capacitor C 1, and comparator IC2 is connected with transistor I C1.
The oblique wave compensation circuit of current mode switch power supply of the present utility model, when H bridge power tube drives conducting, add a low level at the G of transistor I C1 end, the G of transistor I C1 holds not conducting, 1 charging of 1 pair of capacitor C of resistance R, capacitor C 1 voltage constantly rises, like this, the voltage gradient of delivering to comparator IC2 has just increased, and comparator IC2 just can disorderly not overturn, power supply output is also just stable, when driving, add a high level at the G of transistor I C1 end, the G end conducting of transistor I C1 at H bridge power tube, the voltage of capacitor C 1 is 0, waits for next circulation.
The above only is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvement and modification, these improve and modification also should be considered as protection range of the present utility model.
Claims (1)
1. the oblique wave compensation circuit of a current mode switch power supply, comprise circuit to be compensated 1, comparator IC2 is characterized in that: also comprise compensating circuit, described compensating circuit comprises resistance R 1, capacitor C 1 and transistor I C1, described resistance R 1 one termination voltages, another termination capacitor C 1, a terminating resistor R1 of described capacitor C 1, the other end is connected with circuit to be compensated, described transistor I C1 is connected on the two ends of capacitor C 1, and described comparator IC2 is connected with transistor I C1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204958340U CN202889187U (en) | 2012-09-21 | 2012-09-21 | AN oblique wave compensating circuit of a current mode switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204958340U CN202889187U (en) | 2012-09-21 | 2012-09-21 | AN oblique wave compensating circuit of a current mode switching power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202889187U true CN202889187U (en) | 2013-04-17 |
Family
ID=48080574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012204958340U Expired - Fee Related CN202889187U (en) | 2012-09-21 | 2012-09-21 | AN oblique wave compensating circuit of a current mode switching power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202889187U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578783A (en) * | 2013-10-15 | 2015-04-29 | 台达电子企业管理（上海）有限公司 | Converter and method for controlling converter |
-
2012
- 2012-09-21 CN CN2012204958340U patent/CN202889187U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578783A (en) * | 2013-10-15 | 2015-04-29 | 台达电子企业管理（上海）有限公司 | Converter and method for controlling converter |
| CN104578783B (en) * | 2013-10-15 | 2017-08-25 | 台达电子企业管理（上海）有限公司 | Converter and the method for controlling the converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103856043A (en) | Control circuit and four-switch buck-boost converter | |
| CN104883798B (en) | LED linear constant-current drive circuit | |
| CN102594129B (en) | A kind of charge control method of DC bus capacitor of frequency converter and realizing circuit thereof | |
| CN201663720U (en) | Induction cooker controller with IGBT protective circuit and induction cooler | |
| CN204257515U (en) | Control relay circuit | |
| CN202889187U (en) | AN oblique wave compensating circuit of a current mode switching power supply | |
| CN104023445B (en) | A kind of LED drive circuit | |
| CN201503559U (en) | Voltage-drop compensation circuit for power adapter output lines | |
| CN202043053U (en) | Switching power supply with under-voltage protection function | |
| CN203368305U (en) | Driving circuit of IGBT module power switch | |
| CN105763036B (en) | The fast start circuit of power chip and the measuring instrument made of the circuit | |
| CN201656761U (en) | Soft start circuit for PFC switch power supply | |
| CN201893706U (en) | Asymmetric half-bridge magnetic coupling drive circuit | |
| CN204031103U (en) | The gate protection circuit of IGBT and electromagnetic oven | |
| CN204031561U (en) | The anti-rush of current circuit of LED lamp | |
| CN203896189U (en) | Power adapter control circuit for monitor | |
| CN209016942U (en) | A kind of drive electric power unit | |
| CN204156824U (en) | A kind of high frequency compensation | |
| CN203217820U (en) | Electronic smog alarm for teaching | |
| CN202949595U (en) | Light-emitting diode (LED) driving circuit | |
| CN204886132U (en) | Prevent voltage pulse circuit | |
| CN202135070U (en) | Dual-voltage capacitance-resistance voltage-reduction energy saving circuit | |
| CN203178838U (en) | Voltage stabilizer low in output voltage difference | |
| CN203466742U (en) | LED driving power supply | |
| CN204482103U (en) | A kind of low voltage difference LED drive circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20150921 |
|
| EXPY | Termination of patent right or utility model |