CN111917282B - Power supply circuit and power supply method - Google Patents
Power supply circuit and power supply method Download PDFInfo
- Publication number
- CN111917282B CN111917282B CN202010901364.2A CN202010901364A CN111917282B CN 111917282 B CN111917282 B CN 111917282B CN 202010901364 A CN202010901364 A CN 202010901364A CN 111917282 B CN111917282 B CN 111917282B
- Authority
- CN
- China
- Prior art keywords
- voltage
- capacitor
- threshold
- power supply
- threshold value
- 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.)
- Active
Links
Classifications
-
- 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
-
- 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
- H02M1/14—Arrangements for reducing ripples from dc input or output
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
-
- 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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0006—Arrangements for supplying an adequate voltage to the control circuit of converters
-
- 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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0025—Arrangements for modifying reference values, feedback values or error values in the control loop of a converter
-
- 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
Abstract
The invention provides a power supply circuit and a power supply method, wherein an input voltage charges a first capacitor, and the first capacitor voltage is a power supply; when the input voltage drops to a first threshold, the first capacitor charges; the first capacitor charge is turned off when the first capacitor voltage rises to a second threshold or when the input voltage rises to a third threshold. And adjusting the first threshold according to the input voltage when the first capacitor is charged and cut-off, or according to the capacitor voltage when the first capacitor starts to be charged, or according to the capacitor voltage when the first capacitor is charged and cut-off, so as to ensure that the power supply circuit works in the highest efficiency state. The invention has high power supply efficiency and simple circuit structure.
Description
Technical Field
The invention relates to the field of power electronics, in particular to a power supply circuit and a power supply method.
Background
In the conventional high-voltage power supply scheme, a schematic diagram is shown in fig. 1, in which a flyback circuit is used for supplying power, in the drawing, a MOS transistor Q1 is pulled up by a pull-up resistor R1, an input voltage Vin and a power supply voltage V1 of an auxiliary winding charge a capacitor C1 together, when a voltage VCC on the capacitor C1 reaches VZ1-Vth, the charging is ended, the voltage VCC is maintained at VZ1-Vth, VZ1 is the voltage on a voltage-stabilizing transistor Z1, and Vth is the starting voltage of the MOS transistor Q1. If the auxiliary winding supply voltage V1 is higher than VZ1-Vth, the MOS transistor Q1 can be turned off. However, considering that VCC is substantially higher than the auxiliary winding output voltage V1, the VCC voltage is substantially obtained by charging the capacitor C1 with the input voltage Vin, resulting in low power supply efficiency of the switching power supply.
Disclosure of Invention
The invention aims to provide a high-efficiency power supply circuit and a power supply method, which are used for solving the technical problem of low power supply efficiency in the prior art.
In order to achieve the above object, the present invention provides a power supply circuit, in which an input voltage charges a first capacitor, and the first capacitor voltage is a power supply;
when the input voltage drops to a first threshold, the first capacitor charges;
when the first capacitor voltage rises to a second threshold value or when the input voltage rises to a third threshold value, the first capacitor charge is cut off;
and adjusting the first threshold according to the input voltage of the first capacitor when the charging of the first capacitor is stopped, or according to the first capacitor voltage when the charging of the first capacitor is started, or according to the first capacitor voltage when the charging of the first capacitor is stopped.
When the first capacitor is charged and cut-off, sampling input voltage to obtain first voltage; and controlling the first threshold value to be reduced when the first threshold value is larger than the first voltage, and otherwise controlling the first threshold value to be increased.
Optionally, when the first capacitor starts to charge, sampling the voltage of the first capacitor to obtain a second voltage; and when the second voltage is larger than the fourth threshold value, controlling the first threshold value to be reduced, and otherwise, controlling the first threshold value to be increased.
Optionally, when the first capacitor is charged and cut off, sampling the voltage of the first capacitor to obtain a third voltage; and when the third voltage is larger than the fifth threshold value, controlling the first threshold value to be reduced, and otherwise, controlling the first threshold value to be increased.
Optionally, the power supply circuit includes a first field effect transistor and a first switch, a first end of the first field effect transistor receives an input voltage, a control end of the first field effect transistor is grounded, and a second end of the first field effect transistor is connected with a first capacitor through the first switch; when the input voltage drops to a first threshold value, the first switch is conducted, and the first field effect transistor is conducted; when the first capacitor voltage rises to a second threshold value, or when the input voltage rises to a third threshold value, the first switch is turned off, and the first field effect transistor is turned off.
Optionally, the power supply circuit further includes an input voltage sampling circuit, a first threshold generating circuit and a power supply voltage sampling circuit, and when the input voltage sampling circuit samples that the input voltage drops to a first threshold, the first capacitor is controlled to charge; when the power supply voltage sampling circuit samples that the voltage of the first capacitor rises to a second threshold value, controlling the first capacitor to charge and cut off, and simultaneously, the input voltage sampling circuit samples the input voltage at the moment to obtain a first voltage, and the first threshold value generating circuit receives the first voltage and outputs a first threshold value; and when the first threshold value is larger than the first voltage, controlling the first threshold value output by the next working period to be reduced, otherwise, controlling the first threshold value output by the next working period to be increased.
Optionally, the power supply circuit further includes an input voltage sampling circuit, a first threshold generating circuit and a power supply voltage sampling circuit, and when the input voltage sampling circuit samples that the input voltage drops to a first threshold, the first capacitor is controlled to charge; when the input voltage sampling circuit samples that the input voltage rises to a third threshold value, or when the power supply voltage sampling circuit samples that the first capacitor voltage rises to a second threshold value, controlling the first capacitor to charge and cut off; when the first capacitor starts to charge, the power supply voltage sampling circuit samples the voltage of the first capacitor at the moment to obtain the second voltage; the first threshold generating circuit receives the second voltage and the fourth threshold and outputs a first threshold; and when the second voltage is larger than the fourth threshold value, controlling the first threshold value output by the next working period to be reduced, otherwise, controlling the first threshold value output by the next working period to be increased.
Optionally, the power supply circuit further includes an input voltage sampling circuit, a first threshold generating circuit and a power supply voltage sampling circuit, and when the input voltage sampling circuit samples that the input voltage drops to a first threshold, the first capacitor is controlled to charge; when the input voltage sampling circuit samples that the input voltage rises to a third threshold value, controlling the first capacitor to charge and cut off; when the first capacitor is charged and cut off, the power supply voltage sampling circuit samples the voltage of the first capacitor at the moment to obtain the third voltage; the first threshold generating circuit receives the third voltage and the fifth threshold and outputs a first threshold; and when the third voltage is larger than the fifth threshold value, controlling the first threshold value output by the next working period to be reduced, otherwise, controlling the first threshold value output by the next working period to be increased.
The invention also provides a power supply method, wherein the input voltage charges the first capacitor, and the first capacitor voltage is a power supply;
when the input voltage drops to a first threshold, the first capacitor charges;
when the first capacitor voltage rises to a second threshold value or when the input voltage rises to a third threshold value, the first capacitor charge is cut off;
and adjusting the first threshold according to the input voltage when the first capacitor is charged and cut-off, or according to the capacitor voltage when the first capacitor starts to be charged, or according to the capacitor voltage when the first capacitor is charged and cut-off.
Compared with the prior art, the invention has the following advantages: the system only charges near the valley bottom of the input voltage, so that the charging efficiency is high, the loss and the heating value are small, and the reliability of the system is high; the charging mode of the invention can lead the residual voltage of the filter capacitor after the rectifier bridge to be lower when the power grid voltage crosses zero, thereby being beneficial to reducing the Total Harmonic (THD) of the input current.
Drawings
FIG. 1 is a block diagram of a prior art power supply circuit;
figure 2 is a block diagram of the power supply circuit of the present invention,
FIG. 3 is a schematic diagram of a power supply circuit according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a second embodiment of a power supply circuit according to the present invention;
FIG. 5 is a schematic diagram of a third embodiment of a power supply circuit according to the present invention;
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments only. The invention is intended to cover any alternatives, modifications, equivalents, and variations that fall within the spirit and scope of the invention.
In the following description of preferred embodiments of the invention, specific details are set forth in order to provide a thorough understanding of the invention, and the invention will be fully understood to those skilled in the art without such details.
The invention is more particularly described by way of example in the following paragraphs with reference to the drawings. It should be noted that the drawings are in a simplified form and are not to scale in order to facilitate a clear and concise description of embodiments of the present inventions.
As shown in fig. 2, a power supply circuit structure diagram of the present invention is illustrated, and an input voltage VIN is obtained after ac power is rectified. The first end of the power supply circuit receives an input voltage VIN, the second end of the power supply circuit is grounded, the third end of the power supply circuit is connected with a first capacitor C01 through a first switch, and the upper voltage of the first capacitor C01 is a power supply voltage VCC and is used for supplying power to the control module.
Referring to fig. 3, a schematic diagram of an embodiment of a power supply circuit of the present invention is shown, which includes a JEFT tube J1, a switch k1, an input voltage sampling circuit U01, a power supply voltage sampling circuit U02, a logic circuit U03, a comparator U04, and a first threshold generating circuit U05. When the input voltage sampling circuit U01 samples that the input voltage VIN drops to a first threshold VREF1, the input voltage sampling circuit U01 outputs a conduction control signal V_ON to control the switch k1 to be conducted through the logic circuit U03, and the input voltage VIN charges the first capacitor C01; the power supply voltage sampling circuit U02 samples a first capacitor voltage VCC, when the first capacitor voltage VCC is sampled to rise to a second threshold VREF2, the power supply voltage sampling circuit U02 outputs a turn-OFF control signal V_OFF, the logic circuit U03 receives the turn-OFF control signal V_OFF to control the switch k1 to be turned OFF, and meanwhile, the input voltage sampling circuit U01 samples an input voltage VIN to obtain the input voltage with the first voltage VIN1 at the moment. The first threshold generating circuit U05 receives the first voltage VIN1, generates a first threshold VREF1, the comparator U04 compares the first voltage VIN1 with the first threshold VREF1, when the first voltage VIN1 is greater than the first threshold VREF1, the comparator U04 outputs a comparison signal VC1 to control the first threshold VREF1 output by the first threshold generating circuit to decrease in a next working period, otherwise, the first threshold VREF1 increases in a next period.
As shown in fig. 4, a schematic diagram of a second embodiment of the power supply circuit of the present invention is illustrated, which includes a JEFT tube J1, a switch k1, an input voltage sampling circuit U01, a power supply voltage sampling circuit U02, a logic circuit U03, a comparator U04, and a first threshold generating circuit U05. When the input voltage sampling circuit U01 samples that the input voltage VIN drops to a first threshold VREF1, the input voltage sampling circuit U01 outputs a conduction control signal V_ON to control the switch k1 to be conducted through the logic circuit U03, and the input voltage VIN charges the first capacitor C01; when the input voltage sampling circuit U01 samples that the input voltage VIN rises to a third threshold VREF3, the input voltage sampling circuit U01 outputs a turn-OFF control signal v_off, and the logic circuit U03 receives the turn-OFF control signal v_off to control the switch k1 to be turned OFF; when the first capacitor starts to charge, the supply voltage sampling circuit U02 samples the supply voltage VCC, and obtains that the supply voltage at this moment is the second voltage VCC1. The first threshold generating circuit U05 receives the second voltage VCC1, generates a first threshold VREF1, the comparator U04 compares the second voltage VCC1 with a fourth threshold VREF4, when the second voltage VCC1 is greater than the fourth threshold VREF4, the comparator U04 outputs a comparison signal VC2 to control the first threshold VREF1 output by the first threshold generating circuit to decrease in the next working period, otherwise, the first threshold VREF1 increases in the next period.
As shown in fig. 5, a third principle diagram of the power supply circuit of the present invention is illustrated, and the difference from embodiment 2 is that: when the first capacitor C01 is charged and cut off, the supply voltage sampling circuit U02 samples the voltage of the first capacitor C01 to obtain a third voltage VCC2, and when the third voltage VCC2 is greater than the fifth threshold VREF5, the first threshold VREF1 output by the first threshold generation circuit U05 is increased from the previous cycle, otherwise, the first threshold VREF1 is decreased from the previous cycle.
Although the embodiments have been described and illustrated separately above, and with respect to a partially common technique, it will be apparent to those skilled in the art that alternate and integration may be made between embodiments, with reference to one embodiment not explicitly described, and reference may be made to another embodiment described.
The above-described embodiments do not limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the above embodiments should be included in the scope of the present invention.
Claims (6)
1. A power supply circuit, characterized by: the input voltage charges a first capacitor, and the first capacitor voltage is a power supply;
when the input voltage drops to a first threshold, the first capacitor charges;
when the first capacitor voltage rises to a second threshold value or when the input voltage rises to a third threshold value, the first capacitor charge is cut off;
according to the input voltage of the first capacitor when the charging of the first capacitor is stopped, or according to the first capacitor voltage when the charging of the first capacitor is started, or according to the first capacitor voltage when the charging of the first capacitor is stopped, the first threshold value is adjusted;
when the first threshold is adjusted according to the input voltage, sampling the input voltage to obtain a first voltage when the first capacitor is charged and cut off; controlling the first threshold to decrease when the first threshold is greater than the first voltage, otherwise controlling the first threshold to increase;
when the first capacitor starts to charge, sampling the voltage of the first capacitor to obtain a second voltage; controlling the first threshold to decrease when the second voltage is greater than a fourth threshold, otherwise controlling the first threshold to increase;
when the first threshold is adjusted according to the first capacitor voltage when the first capacitor is charged and cut-off, sampling the first capacitor voltage when the first capacitor is charged and cut-off to obtain a third voltage; and when the third voltage is larger than the fifth threshold value, controlling the first threshold value to be reduced, and otherwise, controlling the first threshold value to be increased.
2. The power supply circuit of claim 1, wherein: the power supply circuit comprises a first field effect transistor and a first switch, wherein a first end of the first field effect transistor receives input voltage, a control end of the first field effect transistor is grounded, and a second end of the first field effect transistor is connected with a first capacitor through the first switch; when the input voltage drops to a first threshold value, the first switch is conducted, and the first field effect transistor is conducted; when the first capacitor voltage rises to a second threshold value, or when the input voltage rises to a third threshold value, the first switch is turned off, and the first field effect transistor is turned off.
3. The power supply circuit of claim 2, wherein: the power supply circuit further comprises an input voltage sampling circuit, a first threshold generating circuit and a power supply voltage sampling circuit, and when the input voltage sampling circuit samples that the input voltage drops to a first threshold, the charging of the first capacitor is controlled; when the power supply voltage sampling circuit samples that the voltage of the first capacitor rises to a second threshold value, controlling the first capacitor to charge and cut off, and simultaneously, the input voltage sampling circuit samples the input voltage at the moment to obtain a first voltage, and the first threshold value generating circuit receives the first voltage and outputs a first threshold value; and when the first threshold value is larger than the first voltage, controlling the first threshold value output by the next working period to be reduced, otherwise, controlling the first threshold value output by the next working period to be increased.
4. The power supply circuit of claim 2, wherein: the power supply circuit further comprises an input voltage sampling circuit, a first threshold generating circuit and a power supply voltage sampling circuit, and when the input voltage sampling circuit samples that the input voltage drops to a first threshold, the charging of the first capacitor is controlled; when the input voltage sampling circuit samples that the input voltage rises to a third threshold value, or when the power supply voltage sampling circuit samples that the first capacitor voltage rises to a second threshold value, controlling the first capacitor to charge and cut off; when the first capacitor starts to charge, the power supply voltage sampling circuit samples the voltage of the first capacitor at the moment to obtain the second voltage; the first threshold generating circuit receives the second voltage and the fourth threshold and outputs a first threshold; and when the second voltage is larger than the fourth threshold value, controlling the first threshold value output by the next working period to be reduced, otherwise, controlling the first threshold value output by the next working period to be increased.
5. The power supply circuit of claim 2, wherein: the power supply circuit further comprises an input voltage sampling circuit, a first threshold generating circuit and a power supply voltage sampling circuit, and when the input voltage sampling circuit samples that the input voltage drops to a first threshold, the charging of the first capacitor is controlled; when the input voltage sampling circuit samples that the input voltage rises to a third threshold value, controlling the first capacitor to charge and cut off; when the first capacitor is charged and cut off, the power supply voltage sampling circuit samples the voltage of the first capacitor at the moment to obtain the third voltage; the first threshold generating circuit receives the third voltage and the fifth threshold and outputs a first threshold; and when the third voltage is larger than the fifth threshold value, controlling the first threshold value output by the next working period to be reduced, otherwise, controlling the first threshold value output by the next working period to be increased.
6. A method of supplying power, characterized by: the input voltage charges a first capacitor, and the first capacitor voltage is a power supply;
when the input voltage drops to a first threshold, the first capacitor charges;
when the first capacitor voltage rises to a second threshold value or when the input voltage rises to a third threshold value, the first capacitor charge is cut off;
when the first threshold is adjusted according to the input voltage, sampling the input voltage to obtain a first voltage when the first capacitor is charged and cut off; controlling the first threshold to decrease when the first threshold is greater than the first voltage, otherwise controlling the first threshold to increase;
when the first capacitor starts to charge, sampling the voltage of the first capacitor to obtain a second voltage; controlling the first threshold to decrease when the second voltage is greater than a fourth threshold, otherwise controlling the first threshold to increase;
when the first threshold is adjusted according to the first capacitor voltage when the first capacitor is charged and cut-off, sampling the first capacitor voltage when the first capacitor is charged and cut-off to obtain a third voltage; and when the third voltage is larger than the fifth threshold value, controlling the first threshold value to be reduced, and otherwise, controlling the first threshold value to be increased.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010901364.2A CN111917282B (en) | 2020-09-01 | 2020-09-01 | Power supply circuit and power supply method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010901364.2A CN111917282B (en) | 2020-09-01 | 2020-09-01 | Power supply circuit and power supply method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111917282A CN111917282A (en) | 2020-11-10 |
| CN111917282B true CN111917282B (en) | 2023-08-29 |
Family
ID=73266516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010901364.2A Active CN111917282B (en) | 2020-09-01 | 2020-09-01 | Power supply circuit and power supply method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111917282B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI790701B (en) * | 2021-08-03 | 2023-01-21 | 博盛半導體股份有限公司 | Electromagnetic interference regulator and method by use of capacitive parameters of field-effect transistor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255489A (en) * | 2011-07-26 | 2011-11-23 | 无锡硅动力微电子股份有限公司 | High-voltage start-up circuit for switching power supply converter |
| CN105652074A (en) * | 2014-12-03 | 2016-06-08 | 万国半导体(开曼)股份有限公司 | Voltage detection circuit and voltage change detection method |
| CN110545040A (en) * | 2019-09-11 | 2019-12-06 | 阳光电源股份有限公司 | three-level Buck circuit and control method thereof |
| CN110739846A (en) * | 2019-11-15 | 2020-01-31 | 杰华特微电子（杭州）有限公司 | Switching power supply circuit and power supply method |
| CN211151824U (en) * | 2019-11-15 | 2020-07-31 | 杰华特微电子（杭州）有限公司 | Power supply circuit of switching power supply |
-
2020
- 2020-09-01 CN CN202010901364.2A patent/CN111917282B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255489A (en) * | 2011-07-26 | 2011-11-23 | 无锡硅动力微电子股份有限公司 | High-voltage start-up circuit for switching power supply converter |
| CN105652074A (en) * | 2014-12-03 | 2016-06-08 | 万国半导体(开曼)股份有限公司 | Voltage detection circuit and voltage change detection method |
| CN110545040A (en) * | 2019-09-11 | 2019-12-06 | 阳光电源股份有限公司 | three-level Buck circuit and control method thereof |
| CN110739846A (en) * | 2019-11-15 | 2020-01-31 | 杰华特微电子（杭州）有限公司 | Switching power supply circuit and power supply method |
| CN211151824U (en) * | 2019-11-15 | 2020-07-31 | 杰华特微电子（杭州）有限公司 | Power supply circuit of switching power supply |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111917282A (en) | 2020-11-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100474752C (en) | Semiconductor device for controlling switch power supply | |
| CN101902137B (en) | Power source apparatus | |
| CN103490605B (en) | Isolated switch converter and controller and control method thereof | |
| CN103219887B (en) | Province for power supply changeover device can controller and the energy method of province | |
| CN101867295B (en) | Circuit and control method | |
| CN109905042B (en) | Power supply equipment and power supply circuit thereof | |
| CN101542883A (en) | Switching regulator and operations control method thereof | |
| CN102005731B (en) | Controller, power converter and method for providing over-temperature protection | |
| CN103929048B (en) | A kind of zero cross detection circuit of Switching Power Supply | |
| WO2019076012A1 (en) | Charging apparatus and terminal | |
| CN111917282B (en) | Power supply circuit and power supply method | |
| CN109787482A (en) | Control chip and control method, constant pressure and flow device and isolation flyback PWM system | |
| CN109067206B (en) | AC-DC power supply and control circuit of synchronous rectifier tube thereof | |
| EP2388901A2 (en) | DC-DC converter | |
| CN104917411A (en) | AC-DC control chip of single-stage high power factor correction (PFC) and switching power supply circuit | |
| CN100463342C (en) | Reverse current prevention circuit capable of self-correcting reference benchmark | |
| CN103683861A (en) | Novel silicon-controlled rectifier trigger circuit | |
| CN103414323A (en) | Circuit for reducing turn-on time of current control type switch adjusting system | |
| CN102437724B (en) | AC-DC (alternating current-direct current) chip, system and high-voltage startup control circuit of system | |
| CN208094435U (en) | A kind of AC-DC Switching Power Supplies and its control chip | |
| CN109617544A (en) | A kind of novel electrifying timing sequence control equipment, system and method | |
| CN211151824U (en) | Power supply circuit of switching power supply | |
| CN201418040Y (en) | Driving circuit of synchronous rectifying tube | |
| CN101997436B (en) | Multi-output fly-back power supply and secondary side rear voltage stabilizing circuit | |
| CN105471291A (en) | Flyback type AC-DC voltage conversion circuit and flyback type voltage converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: Room 901-23, 9 / F, west 4 building, Xigang development center, 298 Zhenhua Road, Sandun Town, Xihu District, Hangzhou City, Zhejiang Province, 310030 Applicant after: Jiehuate Microelectronics Co.,Ltd. Address before: Room 901-23, 9 / F, west 4 building, Xigang development center, 298 Zhenhua Road, Sandun Town, Xihu District, Hangzhou City, Zhejiang Province, 310030 Applicant before: JOULWATT TECHNOLOGY Inc.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |