CN113839562A - A multi-output isolated power supply circuit - Google Patents
A multi-output isolated power supply circuit Download PDFInfo
- Publication number
- CN113839562A CN113839562A CN202111113907.5A CN202111113907A CN113839562A CN 113839562 A CN113839562 A CN 113839562A CN 202111113907 A CN202111113907 A CN 202111113907A CN 113839562 A CN113839562 A CN 113839562A
- Authority
- CN
- China
- Prior art keywords
- output
- voltage
- module
- control
- power supply
- 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.)
- Granted
Links
Images
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
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33561—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having more than one ouput with independent control
-
- 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
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- 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
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention relates to a multi-output isolation power supply circuit, which comprises a multi-output power supply module, a power supply driving module, a power supply control module and an overvoltage protection module, wherein the control circuit of the power supply has the functions of stabilizing voltage and stabilizing current of multi-output and protecting and self-recovering functions of the power supply, has the self-adaptive capacity of ultra-wide voltage input range, adopts a simple and reliable application circuit to meet the special application requirements of a power supply of a high-voltage system, and has reliable protection and recovery functions. The technical scheme of the invention provides a set of implementation scheme of the isolated power supply with reliable performance and low cost for the direct-current high-voltage power supply system.
Description
Technical Field
The invention relates to the technical field of power electronic device application, in particular to a multi-output isolation power circuit.
Background
With the development and progress of society, a high-voltage direct-current power supply system is more and more widely applied; compared with a traditional direct-current power supply with the voltage of less than 750VDC, the high-voltage direct-current power supply has higher input voltage, higher power supply isolation requirement on the power supply, larger fluctuation range of the input voltage and more difficult transmission of primary and secondary side signals. How to adopt simple and reliable application circuit to realize satisfying the special application requirement of high voltage system power supply to the isolated power who possesses reliable protection and recovery function is the technological problem that awaits solution urgently.
Disclosure of Invention
Based on the above situation in the prior art, an object of the present invention is to provide a multiple-output isolated power supply circuit, which has a multiple-output voltage stabilizing and current stabilizing function and a power supply protection and self-recovery function, and has an adaptive capability of an ultra-wide voltage input range.
To achieve the above object, according to one aspect of the present invention, there is provided a multi-output isolated power supply circuit, comprising: the device comprises a multi-output power module, a power driving module, a power control module and an overvoltage protection module; wherein,
the multi-output power supply module comprises an input module, a first power supply output module and a second power supply output module, wherein the first power supply output module and the second power supply output module are respectively connected with the input module through transformers;
the power supply control module comprises a first power supply output control module and a second power supply output control module, and the first power supply output control module and the second power supply output control module are respectively and correspondingly connected with the first power supply output module and the second power supply output module and used for generating control signals according to output signals of the first power supply output module and the second power supply output module;
the power supply driving module is connected with the first power supply output control module and used for generating a driving signal according to the control signal to drive the input module;
the overvoltage protection module is connected with the power control module and used for closing the output of the multi-path output power supply when the control signal of the power control module is in overvoltage.
Further, the first power output control module comprises a current sampling unit, a current control unit, a voltage sampling unit and a voltage control unit; wherein,
the current sampling unit and the voltage sampling unit are respectively connected with the first power output module and are used for sampling the output current and the output voltage of the first power output module;
the current control unit receives the sampled output current, and outputs a current control signal when the output current exceeds a first current threshold;
the voltage control unit receives the sampled output voltage and outputs a voltage control signal when the output voltage exceeds a first voltage threshold.
Further, the first power output control module further comprises a control signal output unit;
the control signal output unit receives the current control signal and the voltage control signal and outputs the received current control signal and the received voltage control signal to the power supply driving module.
Further, the current sampling unit comprises a first resistor; the current control unit comprises a first voltage-regulator tube;
one end of the first resistor is connected with the negative end of the first power output module, the other end of the first resistor is connected with the anode of the first voltage-stabilizing tube, and the cathode of the first voltage-stabilizing tube is connected with the control signal output unit.
Further, the voltage sampling unit comprises a second resistor, a third resistor and a fourth resistor; the voltage control unit comprises a second voltage-regulator tube;
the second resistor, the third resistor, the fourth resistor, the fifth resistor, the sixth resistor, the seventh resistor, the eighth resistor, the tenth resistor, the fifth resistor, the tenth resistor, the fifth resistor, the sixth resistor, the fifth resistor, a control electrode of the second voltage-regulator tube and a control electrode of the second voltage regulator tube, the control unit, the control electrode of the second voltage regulator tube, the control unit, the control electrode of the second voltage regulator tube, the control electrode of the second voltage regulator tube, and the control electrode of the second voltage regulator tube, the control unit, the control electrode of the control electrode, the control unit, the control electrode of the second voltage regulator tube, the control electrode, and the control electrode, the control unit, the control electrode, the second voltage regulator tube, the control electrode, and the control electrode, and the control electrode of the second voltage regulator tube, the control electrode, and the control unit, and the control electrode, and the control electrode, wherein, the control electrode of the control electrode, and the control electrode of the control electrode, the.
Further, the control signal output unit comprises an optical coupler;
the input end of the optical coupler is connected with the output ends of the current control unit and the voltage control unit, and the output end of the optical coupler is connected with the power supply driving module.
Further, the second power output control module comprises a voltage sampling unit and a voltage output control unit; wherein,
the voltage sampling unit is connected with the second power output module and is used for sampling the output voltage of the second power output module and feeding the output voltage back to the voltage output control unit;
the voltage output control unit is used for controlling the output voltage according to the fed back voltage.
Further, the voltage sampling unit comprises a fifth resistor; the voltage output control unit comprises a first switch tube and a third voltage-stabilizing tube;
the control electrode of the first switch tube is connected with the cathode of the third voltage-stabilizing tube, and the source electrode of the first switch tube is respectively connected with the anode of the third voltage-stabilizing tube and one end of the fifth resistor;
the drain electrode of the first switch tube is connected with the input end of the second power output module, and the other end of the fifth resistor is connected with the output end of the second power output module.
Furthermore, the overvoltage protection module comprises a sampling signal input unit, a latch unit and a protection signal output unit;
the sampling signal input unit is used for receiving a sampling signal of the power supply driving module;
the latch unit receives the output of the sampling signal input unit and outputs a latch signal when the sampling signal is over-voltage;
the protection signal output unit outputs a protection signal to close the power driving module when receiving the latch signal.
Further, the latch unit comprises a second switching tube, a third switching tube, a sixth resistor and a seventh resistor;
the grid electrode of the second switching tube is connected with the collector electrode of the third switching tube through a sixth resistor, and the grid electrode of the third switching tube is connected with the collector electrode of the second switching tube through a seventh resistor.
In summary, the present invention provides a multi-output isolated power supply circuit, which includes a multi-output power supply module, a power supply driving module, a power supply control module, and an overvoltage protection module, wherein the power supply control circuit has a multi-output voltage stabilization and current stabilization function, a power supply protection and self-recovery function, and an ultra-wide voltage input range self-adaptation capability, and a simple and reliable application circuit is adopted to meet the special application requirements of a power supply of a high-voltage system, and has a reliable protection and recovery function. The technical scheme of the invention provides a set of implementation scheme of the isolated power supply with reliable performance and low cost for the direct-current high-voltage power supply system.
Drawings
FIG. 1 is a schematic diagram of a circuit configuration of a multi-output power module;
FIG. 2 is a schematic diagram of a circuit configuration of a first power output control module;
FIG. 3 is a schematic diagram of a circuit configuration of a second power output control module;
fig. 4 is a schematic circuit diagram of the overvoltage protection module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings. According to an embodiment of the present invention, there is provided a multi-output isolation power supply circuit including: the device comprises a multi-output power module, a power driving module, a power control module and an overvoltage protection module. Fig. 1 shows a schematic circuit diagram of the multi-output power supply module. The multi-output power supply module comprises an input module, a first power supply output module and a second power supply output module, wherein the first power supply output module and the second power supply output module are respectively connected with the input module through transformers. The multi-path output power supply module can adopt a flyback topology power supply circuit, a main topology adopts double-tube flyback, a secondary side has 4 output windings, 2 of the output windings are output power supply windings, and the power supply requirements of voltage stabilization and current stabilization are met; the 1 path is an auxiliary power supply winding for supplying power to a power supply driving module (in this embodiment, for example, a primary side control chip UC 2844); the last 1 way is a standby power supply winding which is connected into forward excitation. The first power output module is 16V output, for example, and the second power output module is 220V output, for example.
The power supply control module comprises a first power supply output control module and a second power supply output control module, wherein the first power supply output control module and the second power supply output control module are respectively and correspondingly connected with the first power supply output module and the second power supply output module and used for generating control signals according to output signals of the first power supply output module and the second power supply output module. Fig. 2 shows a schematic circuit structure diagram of the first power output control module, and a schematic circuit structure diagram of the first power output control module connected to the power driving module. The first power output control module comprises a current sampling unit, a current control unit, a voltage sampling unit, a voltage control unit and a control signal output unit. The current sampling unit and the voltage sampling unit are respectively connected with the first power output module and are used for sampling the output current and the output voltage of the first power output module; the current control unit receives the sampled output current, and outputs a current control signal when the output current exceeds a first current threshold; the voltage control unit receives the sampled output voltage and outputs a voltage control signal when the output voltage exceeds a first voltage threshold; the control signal output unit receives the current control signal and the voltage control signal and outputs the received current control signal and voltage control signal to the power supply driving module. The power supply driving module is connected with the first power supply output control module and used for generating a driving signal according to the control signal to drive the input module. The current sampling unit comprises a first resistor R167; the current control unit comprises a first voltage regulator tube DZ 19; one end of the first resistor R167 is connected to the negative terminal 16VGND of the first power output module, the other end is connected to the anode of the first voltage regulator DZ19, and the cathode of the first voltage regulator DZ19 is connected to the control signal output unit. The voltage sampling unit comprises a second resistor R231, a third resistor R235 and a fourth resistor R239; the voltage control unit comprises a second voltage regulator tube DZ 18; the second to fourth resistors R231, R235 and R239 are connected in series between the positive and negative ends of the first power output module, the connection point of the second and third resistors R231, R235 is connected to the control electrode of the second voltage regulator tube DZ18, and the cathode of the second voltage regulator tube DZ18 is connected to the control signal output unit. The control signal output unit comprises an optical coupler CNY 2; the input end of the optical coupler CNY2 is connected with the outputs of the current control unit and the voltage control unit, and the output end is connected with the power supply driving module. Specifically, taking the output 16V winding as an example, R167 is an output current sampling resistor, the sampling voltage is Vo (Vo < 0), and after the 16V power supply output is established, a stable 2.5V reference voltage is generated through a TL431 chip shown as DZ 7. The 2.5V reference is passed through resistors R234, R236 and R238 to divide the voltage of 2.5V-Vo to reach R236 and R238, which are equal to 2.5V (at this time, the voltage of R234 is equal to-Vo) to trigger the TL431 chip shown by DZ19 to act, so as to cause the primary side of the optical coupler CNY2 to act, generate a control signal, and act on the COMP port of UC2844 to perform loop regulation to realize current stabilization control. And setting the resistance value of the R234, the threshold value of Vo and the resistance value of the sampling resistor R167, so that high-precision constant-current control can be realized. The resistors R231, R235 and R239 divide the output voltage of 16V to enable the voltage at two ends of the R239 to be 2.5V, so that the TL431 chip shown by DZ18 is triggered to act, the primary side of the optical coupler CNY2 acts, a control signal is generated, and the control signal acts on a COMP port of a control chip U4UC2844 of the power supply driving module to perform loop regulation to achieve current stabilization control. The voltage control signal and the current control signal are connected in parallel and jointly transmit the control signal through the optical coupler CNY2, and the automatic switching of a voltage current loop can be realized. The high-precision constant-pressure control can be realized by setting the partial pressure proportion of R231, R235 and R239.
Fig. 3 is a schematic circuit diagram of a second power output control module, where the second power output control module includes a voltage sampling unit and a voltage output control unit, and the voltage sampling unit is connected to the second power output module and is used for sampling an output voltage of the second power output module and feeding the output voltage back to the voltage output control unit; the voltage output control unit is used for controlling the output voltage according to the fed back voltage. The voltage sampling unit comprises a fifth resistor R179; the voltage output control unit comprises a first switching tube Q8 and a third voltage-regulator tube DZ 9; a control electrode of the first switch Q8 is connected with a cathode of a third voltage regulator tube DZ9, and a source electrode of the first switch Q8 is respectively connected with an anode of the third voltage regulator tube DZ9 and one end of a fifth resistor R179; the drain of the first switch tube Q8 is connected to the input terminal of the second power output module, and the other end of the fifth resistor R179 is connected to the output terminal of the second power output module. As shown in fig. 3, the second power output module is connected to an output winding of the transformer, rectified by a diode, and outputs a dc voltage, the dc voltage passes through a resistor R121, a resistor R131, a resistor R125, a resistor R134, a resistor R126, a resistor R179, and a resistor R122, passes through a filter inductor L1, and then reaches an output capacitor E1 to establish a loop, when the voltage at two ends of the resistor R126 reaches or exceeds 12V, a voltage regulator DZ9 is triggered to break down in a reverse direction to stabilize the voltage, and a stable driving voltage is provided for the Q8 to turn on the Q8, and the dc voltage is directly output to the output capacitor E1 of 220V through the resistors R121, R131, Q8, R179, and R122. The resistors R121 and R131 are current-limiting resistors, and can be 2W resistors of 50-100 Ω, R179 and R122 are current sampling resistors, and the resistance values are also small, and the specific resistance value can be determined according to the magnitude of the current-limiting value, for example, 10mA, 1,25V/0.01A is taken as 125 Ω (where 1.25V is a reference provided by a TL431 series new product). After Q8 is conducted, stable output voltage can be established, the output constant current function of the winding triggers DZ10 (for example, 1.25V voltage stabilization type) to act when the voltage reaches 1.25V through sampling of R179 and R122, so that the voltage at two ends of DZ9 is reduced, the driving voltage of Q8 is reduced, the resistance of Q8 is increased, the output current is reduced, the output is maintained in a constant current state, the voltage at two ends of the resistance R179 can trigger Q16 to be conducted when the voltage reaches more than 0.7V, the driving voltage of Q8 is short-circuited, and the purposes of closing Q8 and closing the output voltage are achieved. R125 and R134 are resistors with large resistance values, which are used to provide the minimum current required for driving the switch, and generally take a value of, for example, 10k Ω, and cannot provide sufficient output supply current. The voltage stabilization of the circuit is realized by dividing the voltage of the resistor R127, the resistor R139, the resistor R147 and the resistor R150 to enable the voltage of the resistor R150 to reach 2.5V, triggering the DZ12 to act, so that the direct-current voltage can form a loop through the resistor R140, the resistor R141, the resistor R144, the resistor R148 and the DZ12, the voltage of the resistor R148 reaches the driving threshold of the Q12, the Q12 is conducted, the voltage of the driving gate of the Q8 is discharged through the resistor R138, the resistor Q12 and the resistor DZ11, the driving voltage of the Q8 is lower than the conduction requirement, and the Q8 is closed, so that the voltage stabilization output is realized. The same 20V regulator is used for DZ10 and DZ11 to protect the DZ12 from damage in excess of 36V. Therefore, the voltage stabilizing control range of the DZ12 (for example, a TL431 chip can be adopted) is expanded from the input within 2.5V-36V to the high-voltage input supporting above 36V for linear voltage stabilizing application.
The overvoltage protection module is connected with the power control module and used for closing the output of the multi-path output power supply when the control signal of the power control module is in overvoltage. The overvoltage protection module comprises a sampling signal input unit, a latch unit and a protection signal output unit; the sampling signal input unit is used for receiving a sampling signal of the power supply driving module; the latch unit receives the output of the sampling signal input unit and outputs a latch signal when the sampling signal is over-voltage; the protection signal output unit outputs a protection signal to close the power driving module when receiving the latch signal. The latch unit comprises a second switching tube Q28, a third switching tube Q29, a sixth resistor R246 and a seventh resistor R247; the gate of the second switching transistor Q28 is connected to the collector of the third switching transistor Q29 through a sixth resistor R246, and the gate of the third switching transistor Q29 is connected to the collector of the second switching transistor Q28 through a seventh resistor R247. Fig. 4 shows a schematic circuit diagram of the overvoltage protection module, which is described in detail below with reference to fig. 4. The CS signal in fig. 4 is a primary current detection signal, and referring to fig. 2, the signal is connected to the protection pin CSR of the power driving circuit chip U4UC2844, but because the circuit has a capacitive load (the storage capacitor is not fully charged) during the soft start of the driving circuit, a short circuit state is approximated, in order to avoid false protection, the RC time constant is large, the protection action is generally slow, and the circuit is provided with an overcurrent detection signal through a multi-stage RC circuit, because the CS is indirectly raised by the diode D45, the general overcurrent signal cannot trigger the circuit to operate, and only when the circuit is short-circuited, the CS voltage is particularly high, the circuit is triggered for short circuit fast protection. The CS1 protection action level of the normal driving signal is 1V, if the CS signal in fig. 4 is to function, it is first necessary to turn on the transistor Q29, 3 diodes are needed to increase the CS protection threshold to above 2.1V, the RC time constant formed by R248, C52 and C51 is very short, the signal detection speed is fast, but the general overcurrent signal cannot reach 2.1V, and it is possible to reach above 2.1V only in case of short circuit, at this time, the transistor Q29 is turned on, Q29 and Q28 form a signal latch, once Q29 is turned on, Q28 is turned on, Q28 is turned on, Q29 is maintained to be turned on, so that a latched low level signal is generated to turn on Q27 to pull up CS1 to VREF level, generate a fault signal, turn off the driving, because the driving is turned off, the circuit no longer works, the primary side auxiliary power supply feedback winding of the secondary side also loses voltage, and the chip 2844 loses power, and then VREF also loses power, the trigger circuit can complete reset, and the whole set of power supply circuit returns to the soft start working state of initial power-on again, so that when the circuit outputs short circuit, the short circuit output time can be reduced, the short circuit loss is reduced, and the long-time short circuit output of the power supply is maintained to be not damaged.
In summary, the present invention relates to a multi-output isolated power supply circuit, which integrates a forward circuit and a flyback circuit, and can reliably determine and transmit a short-circuit signal when the main output of the power supply is short-circuited; the multi-path output respectively adopts linear voltage and current stabilization and isolation feedback closed loop voltage and current stabilization, and the non-main output winding of the power supply can also realize autonomous constant current and constant voltage control and short circuit overcurrent protection; the power circuit takes a flyback power topology as a core framework, a forward output winding is added, when the flyback output circuit is normal, the forward winding outputs voltage stabilization and current limitation, and the voltage stabilization and current limitation is used as a standby power supply to keep no-load or light-load operation; when the flyback output circuit is in short circuit, the power supply can automatically supply power to the protection circuit, fault signals are reliably transmitted to the primary winding, sufficient voltage output can be guaranteed when the primary winding operates at an extremely low duty ratio under the condition of short-circuit protection, the reliability of a fault detection circuit power supply is guaranteed, the forward winding has extremely low output current, the flyback circuit can directly reset magnetic flux, and a reset circuit is not needed; in the flyback multi-path output of the power circuit, high-power output is used as main output to design a feedback circuit, the voltage and current stabilizing function of a main output circuit is realized through closed-loop regulation, and voltage stabilizing, current stabilizing and output overcurrent protection control of other output circuits are realized through an analog circuit which takes a voltage stabilizing tube as a reference. Each path can realize the functions of voltage stabilization, current stabilization and output overcurrent protection, and the output of each output voltage grade of 5-220VDC can be realized.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111113907.5A CN113839562B (en) | 2021-09-23 | 2021-09-23 | Multi-output isolated power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111113907.5A CN113839562B (en) | 2021-09-23 | 2021-09-23 | Multi-output isolated power supply circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113839562A true CN113839562A (en) | 2021-12-24 |
| CN113839562B CN113839562B (en) | 2024-04-12 |
Family
ID=78969192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111113907.5A Active CN113839562B (en) | 2021-09-23 | 2021-09-23 | Multi-output isolated power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113839562B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114785154A (en) * | 2022-05-30 | 2022-07-22 | 中国铁塔股份有限公司 | Power supply circuit and power supply device |
| CN120675537A (en) * | 2025-08-20 | 2025-09-19 | 无锡市晶源微电子股份有限公司 | Self-adaptive signal latch circuit and leakage protection device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101232237A (en) * | 2007-01-26 | 2008-07-30 | 艾默生网络能源系统有限公司 | Multi-output power supply |
| CN202696122U (en) * | 2012-06-21 | 2013-01-23 | 深圳市同洲电子股份有限公司 | Short-circuit protection circuit of multiplexed output power and electronic equipment |
| CN107155238A (en) * | 2017-06-13 | 2017-09-12 | 深圳民爆光电技术有限公司 | A kind of multiple-channel output constant current driver circuit for LED and driving method |
| CN110875687A (en) * | 2018-09-04 | 2020-03-10 | 上海航空电器有限公司 | Aviation isolation type flyback switching power supply converter |
| CN111082667A (en) * | 2020-01-22 | 2020-04-28 | Msj系统有限责任公司 | Multi-output switching power supply |
-
2021
- 2021-09-23 CN CN202111113907.5A patent/CN113839562B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101232237A (en) * | 2007-01-26 | 2008-07-30 | 艾默生网络能源系统有限公司 | Multi-output power supply |
| CN202696122U (en) * | 2012-06-21 | 2013-01-23 | 深圳市同洲电子股份有限公司 | Short-circuit protection circuit of multiplexed output power and electronic equipment |
| CN107155238A (en) * | 2017-06-13 | 2017-09-12 | 深圳民爆光电技术有限公司 | A kind of multiple-channel output constant current driver circuit for LED and driving method |
| CN110875687A (en) * | 2018-09-04 | 2020-03-10 | 上海航空电器有限公司 | Aviation isolation type flyback switching power supply converter |
| CN111082667A (en) * | 2020-01-22 | 2020-04-28 | Msj系统有限责任公司 | Multi-output switching power supply |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114785154A (en) * | 2022-05-30 | 2022-07-22 | 中国铁塔股份有限公司 | Power supply circuit and power supply device |
| CN120675537A (en) * | 2025-08-20 | 2025-09-19 | 无锡市晶源微电子股份有限公司 | Self-adaptive signal latch circuit and leakage protection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113839562B (en) | 2024-04-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102882380B (en) | Multi-path output flyback power supply with output short-circuit protection function and protection method | |
| CN104980053B (en) | Flyback-based power conversion device | |
| US11955893B2 (en) | Switching power supply, power adapter and charger | |
| CN103208934B (en) | A kind of pulse width modulating switch power source controller and Switching Power Supply | |
| US11716029B2 (en) | Power supply circuit for switching mode power supply and control method thereof | |
| US20240372477A1 (en) | Implementation method of using auxiliary winding of transformer to supply power to primary controller | |
| CN217445265U (en) | Current limit control circuit | |
| CN113839562B (en) | Multi-output isolated power supply circuit | |
| CN113972629A (en) | ACDC converter and management chip thereof | |
| CN113067456B (en) | Method for reducing standby power consumption based on self-powered technology and application | |
| CN103904621B (en) | Current-limiting protection with self-recovering function and short-circuit protection circuit | |
| US9350251B2 (en) | Power conversion apparatus and over power protection method thereof | |
| CN213693478U (en) | Isolated voltage conversion circuit, control circuit thereof and electronic packaging piece | |
| CN114899802A (en) | An LED drive power supply with overvoltage protection circuit | |
| CN212231336U (en) | Switching power supply, power adapter and charger | |
| CN215452503U (en) | Protection circuit of multi-output switching power supply | |
| CN117394671A (en) | Energy-taking power supply topology and method for series connection application of energy-taking power supply topology and power module voltage-equalizing resistor | |
| CN108988297A (en) | Hiccup time control circuit and the Switching Power Supply comprising the circuit | |
| CN223729438U (en) | Overvoltage protection circuit and electronic equipment | |
| CN218449865U (en) | Circuit for supplying power to switching power supply control circuit based on auxiliary winding | |
| CN222736014U (en) | A power supply starting circuit and a power module | |
| CN222262501U (en) | PSR control chip output voltage control circuit | |
| CN111478287A (en) | Charging pile switching power supply fault protection circuit and charging pile power supply | |
| CN111614062A (en) | Short circuit protection circuit of multiple output power supply | |
| CN221058036U (en) | Power over-temperature protection circuit |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |