CN215833814U - High-voltage switch power supply feedback loop and high-voltage switch power supply - Google Patents
High-voltage switch power supply feedback loop and high-voltage switch power supply Download PDFInfo
- Publication number
- CN215833814U CN215833814U CN202120749613.0U CN202120749613U CN215833814U CN 215833814 U CN215833814 U CN 215833814U CN 202120749613 U CN202120749613 U CN 202120749613U CN 215833814 U CN215833814 U CN 215833814U
- Authority
- CN
- China
- Prior art keywords
- power supply
- resistor
- output
- circuit
- capacitor
- 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
Images
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model provides a high-voltage switch power supply feedback loop and a high-voltage switch power supply, wherein the feedback loop is connected in a way that: the collector and the emitter of the photoelectric coupler are respectively connected with a first feedback end of a switching power supply and a second feedback end of the switching power supply, the anode of the photoelectric coupler is connected with one end of a tenth resistor and a first rectification output signal end of the switching power supply, the cathode of the photoelectric coupler is connected with the other end of the tenth resistor, one end of a phase compensation circuit and the cathode end of a programmable reference, the anode end of the programmable reference is connected with one fixed end of a potentiometer and the output ground of the switching power supply, the sliding end of the potentiometer is connected with the other fixed end of the potentiometer and one end of an eighth resistor, the other end of the eighth resistor is connected with the other end of the phase compensation circuit, the external input reference end of the programmable reference and one end of a seventh resistor, and the other end of the seventh resistor is connected with a second rectification output signal end of the switching power supply. The high-voltage switching power supply can obtain output voltage of over 36V to kV level.
Description
Technical Field
The utility model belongs to the technical field of electronics, and particularly relates to a feedback loop of a high-voltage switching power supply and the high-voltage switching power supply.
Background
The programmable reference is an adjustable three-terminal parallel voltage-stabilizing unit circuit, and is mainly applied to forming a reference voltage source or a feedback loop of a switching power supply. For a reference voltage source with a reference voltage lower than 36V or a feedback loop of a switching power supply with a fixed or adjustable output voltage, an integrated circuit similar to TL431 is used, and the integrated circuit is the preferred circuit except for a Zener diode, and the obtained reference voltage source or the switching power supply has high precision, good stability and low cost. For the feedback loop of the precision switching power supply with the reference voltage higher than 36V, particularly the feedback loop of the precision switching power supply with the adjustable output voltage, the error of a Zener diode with fixed voltage is large and is not available, and a proper integrated circuit or a precision programmable reference unit circuit is not available.
For the above reasons, for a precision switching power supply with an adjustable output voltage, the maximum output voltage of which is 36V or more, a feedback loop does not have a suitable integrated circuit or a precision programmable reference unit circuit available, and the current implementation method is as follows: the output dynamic voltage measured by using a resistance voltage division method is directly fed back, the stability of the method and the response time of a feedback loop are difficult to be considered, and the stability of a power supply is poor; secondly, the output of a low-voltage output winding of the same transformer is used for feedback, and the required voltage is output by using a high-voltage output winding, so that the method is limited by the error among the windings, and the obtained output voltage has poor precision; and thirdly, the high-voltage output voltage is obtained by using advanced means, such as a quick-response high-voltage measuring sensor, the required high-voltage switching power supply can be obtained by the method, but the quick-response high-voltage measuring sensor is expensive, the product of the sensor is basically invisible in the market, and the economy is not high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a feedback loop of a high-voltage switching power supply and the high-voltage switching power supply, and aims to solve the problem that the feedback loop does not have a proper integrated circuit or a programmable reference unit circuit for the high-voltage switching power supply with adjustable output voltage with the highest output voltage of more than 36V.
In a first aspect, the present invention provides a feedback loop for a high voltage switching power supply, comprising: the circuit comprises a programmable reference, a phase compensation circuit, a photoelectric coupler U3, a potentiometer VR1, a seventh resistor R7, an eighth resistor R8 and a tenth resistor R10; the collector and the emitter of the photoelectric coupler U3 are respectively connected with a first feedback end FB1 of the switching power supply and a second feedback end FB2 of the switching power supply, the anode of the photoelectric coupler U3 is connected with one end of a tenth resistor R10 and a first rectification output signal end S1 of the switching power supply, the cathode of the photoelectric coupler U3 is connected with the other end of the tenth resistor R10, one end 1 of a phase compensation circuit and a cathode end K of a programmable reference, an anode end A of the programmable reference is connected with one fixed end of a potentiometer VR1 and a switching power supply output ground GND, a sliding end of the potentiometer VR1 is connected with the other fixed end of the potentiometer VR1 and one end of an eighth resistor R8, the other end of the eighth resistor R8 is connected with the other end 2 of the phase compensation circuit, an external input reference end REF of the programmable reference and one end of a seventh resistor R7, and the other end of the seventh resistor R7 is connected with a second rectification output signal end S2 of the switching power supply.
Further, the programmable reference comprises a transistor Q1, an operational amplifier U1, an internal reference source; the collector or the drain of the transistor Q1 is connected to the cathode terminal K of the programmable reference, the emitter or the source of the transistor Q1 is connected to the ground terminal of the operational amplifier U1, the ground terminal of the internal reference source, the internal signal ground F and the anode terminal a of the programmable reference, the base or the gate of the transistor Q1 is connected to the output terminal of the operational amplifier U1, the power terminal of the operational amplifier U1 is connected to the input terminal of the internal reference source and the auxiliary power terminal VCC, the non-inverting input terminal of the operational amplifier U1 is connected to the external input reference terminal REF of the programmable reference, and the inverting input terminal of the operational amplifier U1 is connected to the output terminal of the internal reference source; the collector or drain of the transistor Q1 is open inside the cell circuit of the programmable reference.
In a second aspect, the present invention provides a high voltage switching power supply, where the high voltage switching power supply includes the feedback loop of the high voltage switching power supply, and further includes a high voltage switching power supply control and output rectification circuit, a seventh capacitor C7, a first inductor L1, and an eighth capacitor C8; a first switch power supply rectification output signal end S1 of the high-voltage switch power supply feedback loop is connected with a switch power supply rectification output end Vro of the high-voltage switch power supply control and output rectification circuit, one end of a seventh capacitor C7 and one end of a first inductor L1, the other end of the seventh capacitor C7 is connected with one end of an eighth capacitor C8, the grounding end GND of the high-voltage switch power supply control and output rectification circuit, the grounding end GND of the high-voltage switch power supply feedback loop and the grounding end GND of the switch power supply output, the other end of a first inductor L1 is connected with the other end of an eighth capacitor C8, a second switch power supply rectification output signal end S2 and a switch power supply output end Vo of the high-voltage switch power supply feedback loop, a first switch power supply feedback end FB1 of the high-voltage switch power supply feedback loop is connected with a first feedback end FB3 of the high-voltage switch power supply control and output rectification circuit and a second switch power supply feedback end FB2 of the high-voltage switch power supply feedback loop is connected with the high-voltage switch power supply control and output rectification circuit And a second feedback terminal FB4 of the output rectifying circuit.
Further, the high-voltage switch power supply control and output rectification circuit comprises an FB local circuit, an input pulse width modulation controller, a power switch local circuit, a transformer isolation output local circuit and a rectifier diode D1; the cathode of the rectifier diode D1 is connected with the switch power supply rectification output end Vro of the high-voltage switch power supply control and output rectification circuit, the anode of the rectifier diode D1 is connected with the first end of the transformer isolation output local circuit, the second end of the transformer isolation output local circuit is connected with the input pulse width modulation controller and one end of the power switch local circuit, the third end of the transformer isolation output local circuit is connected with the grounding end GND of the high-voltage switch power supply control and output rectification circuit, the other ends of the input pulse width modulation controller and the power switch local circuit are connected with a first end of the FB local circuit, a second end of the FB local circuit is connected with a first feedback end FB3 of the high-voltage switch power supply control and output rectification circuit, and a third end of the FB local circuit is connected with a second feedback end FB4 of the high-voltage switch power supply control and output rectification circuit.
In the utility model, the feedback loop of the high-voltage switching power supply comprises a programmable reference, so that the high-voltage switching power supply with adjustable output voltage with the highest output voltage of more than 36V to kV level can be obtained conveniently at low cost.
Drawings
Fig. 1 is a schematic diagram of a feedback loop of a high-voltage switching power supply according to a first embodiment of the present invention.
Fig. 2 is a schematic diagram of another feedback loop of a high-voltage switching power supply according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a high-voltage switching power supply according to a second embodiment of the present invention.
Fig. 4 is a schematic diagram of another feedback loop of a high-voltage switching power supply according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of another high-voltage switching power supply according to a second embodiment of the present invention.
Fig. 6 is a specific circuit diagram of a high-voltage switching power supply according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
The first embodiment is as follows:
referring to fig. 1, an embodiment of the utility model provides a feedback loop of a high voltage switching power supply, including: the circuit comprises a programmable reference, a phase compensation circuit, a photoelectric coupler U3, a potentiometer VR1, a seventh resistor R7, an eighth resistor R8 and a tenth resistor R10; the collector and the emitter of the photoelectric coupler U3 are respectively connected with a first feedback end FB1 of the switching power supply and a second feedback end FB2 of the switching power supply, the anode of the photoelectric coupler U3 is connected with one end of a tenth resistor R10 and a first rectification output signal end S1 of the switching power supply, the cathode of the photoelectric coupler U3 is connected with the other end of the tenth resistor R10, one end 1 of a phase compensation circuit and a cathode end K of a programmable reference, an anode end A of the programmable reference is connected with one fixed end of a potentiometer VR1 and a switching power supply output ground GND, a sliding end of the potentiometer VR1 is connected with the other fixed end of the potentiometer VR1 and one end of an eighth resistor R8, the other end of the eighth resistor R8 is connected with the other end 2 of the phase compensation circuit, an external input reference end REF of the programmable reference and one end of a seventh resistor R7, and the other end of the seventh resistor R7 is connected with a second rectification output signal end S2 of the switching power supply.
In the first embodiment of the present invention, referring to fig. 2, the programmable reference comprises a transistor Q1, an operational amplifier U1, an internal reference source; the collector or the drain of the transistor Q1 is connected to the cathode terminal K of the programmable reference, the emitter or the source of the transistor Q1 is connected to the ground terminal of the operational amplifier U1, the ground terminal of the internal reference source, the internal signal ground F and the anode terminal a of the programmable reference, the base or the gate of the transistor Q1 is connected to the output terminal of the operational amplifier U1, the power terminal of the operational amplifier U1 is connected to the input terminal of the internal reference source and the auxiliary power terminal VCC, the non-inverting input terminal of the operational amplifier U1 is connected to the external input reference terminal REF of the programmable reference, and the inverting input terminal of the operational amplifier U1 is connected to the output terminal of the internal reference source; the collector or drain of the transistor Q1 is open inside the cell circuit of the programmable reference.
In the first embodiment of the present invention, the transistor Q1 includes a bipolar transistor, a junction field effect transistor, a metal oxide semiconductor field effect transistor, a silicon carbide metal oxide semiconductor field effect transistor, and an insulated gate bipolar transistor.
In the first embodiment of the present invention, the operational amplifier includes a rail-to-rail operational amplifier and a non-rail-to-rail operational amplifier.
In the first embodiment of the present invention, the internal reference source includes a programmable reference integrated circuit U2 and a sixth resistor R6; one end of the sixth resistor R6 is connected to the input end of the internal reference source, the other end of the sixth resistor R6 is connected to the cathode end and the reference end of the programmable reference integrated circuit U2 and the output end of the internal reference source, and the anode end of the programmable reference integrated circuit U2 is connected to the ground end of the internal reference source.
In the first embodiment of the present invention, the programmable reference may further include a filter circuit and a voltage divider circuit, the filter circuit includes a fourth capacitor C4 and a fifth resistor R5, and the voltage divider circuit includes a third resistor R3 and a fourth resistor R4; one end of the fourth capacitor C4 is connected to one end of the fourth resistor R4, the ground terminal of the operational amplifier U1 and the ground terminal of the internal reference source, the other end of the fourth capacitor C4 is connected to the inverting input terminal of the operational amplifier U1 and one end of the fifth resistor R5, the other end of the fifth resistor R5 is connected to one end of the third resistor R3 and the other end of the fourth resistor R4, and the other end of the third resistor R3 is connected to the output terminal of the internal reference source.
In the first embodiment of the present invention, the programmable reference further includes a first resistor R1, a second resistor R2, a first capacitor C1, a second capacitor C2, and a third capacitor C3; two ends of the first resistor R1 are respectively connected to the output end of the operational amplifier U1 and the base or gate of the transistor Q1, two ends of the second capacitor C2 are respectively connected to the anode end a of the programmable reference and the base or gate of the transistor Q1, two ends of the first capacitor C1 are respectively connected between the power end of the operational amplifier U1 and the ground end, two ends of the second resistor R2 are respectively connected between the anode end a of the programmable reference and the emitter or source of the transistor Q1, one end of the third capacitor C3 is connected to the output end of the internal reference source, and the other end of the third capacitor C3 is connected to the ground end of the internal reference source. With particular reference to fig. 4.
In the first embodiment of the present invention, the phase compensation circuit includes a fifth capacitor C5, a sixth capacitor C6, and an eleventh resistor R11; one end of the fifth capacitor C5 is connected to one end of a sixth capacitor C6 and one end 1 of the phase compensation circuit, the other end of the sixth capacitor C6 is connected to one end of an eleventh resistor R11, and the other end of the fifth capacitor C5 is connected to the other end of the eleventh resistor R11 and the other end 2 of the phase compensation circuit.
The circuit principle is as follows:
the auxiliary power supply terminal VCC generates an internal reference voltage through a programmable reference integrated circuit U2, a sixth resistor R6 and a third capacitor C3, the internal reference voltage is subjected to voltage division by R3 and R4 and then filtered by R5 and C4 to generate an internal reference voltage at Vref, the reverse input end of an operational amplifier U1 is connected with the internal reference voltage Vref, the non-inverting input end of the operational amplifier U1 is connected with an external reference feedback signal through an external input reference end REF, the output end of the operational amplifier U1 is connected with the base or gate of a transistor Q1 through a first resistor R1 and a second capacitor C2 of an integrating circuit, and the impedance between a cathode terminal K and an anode terminal A and the voltage difference between the external reference feedback signal and the internal reference voltage Vref form negative feedback. When the voltage on the C7 is increased, the current of a light emitting diode of the photoelectric coupler U3 is increased, a negative feedback signal is enhanced, and the voltage on the C7 is stably dropped under the control of the switching power supply; when the voltage on the C7 is reduced, the current of a light emitting diode of the photoelectric coupler U3 is reduced, a negative feedback signal is weakened, and the voltage on the C7 is stably raised back under the control of the switching power supply; when the voltage on the C8 is increased, the voltage on the R8+ VR1 (at REF) is increased, the voltage on the base electrode or the grid electrode of the transistor Q1 is increased, the voltage between the collector electrode and the emitter electrode (or between the drain electrode and the source electrode) of the transistor Q1 is reduced, the current of a light emitting diode of the photoelectric coupler U3 is increased, a negative feedback signal is enhanced, and the voltage on the C7 is stably dropped under the control of the switching power supply, so that the voltage on the C8 is stably dropped; when the voltage at C8 decreases, the voltage at R8+ VR1 (at REF) decreases, the base or gate voltage of transistor Q1 decreases, the voltage between the collector and emitter (or between the drain and source) of transistor Q1 increases, the led current of photocoupler U3 decreases, the negative feedback signal decreases, and the switching power supply control stabilizes the voltage at C7, thereby stabilizing the voltage at C8.
The output voltage Vo of the switching power supply is Vref (R7+ R8+ VR1 regulation)/(R8 + VR1 regulation).
In the embodiment of the utility model, the feedback loop of the high-voltage switching power supply comprises a programmable reference, so that the high-voltage switching power supply with adjustable output voltage with the highest output voltage of more than 36V to kV level can be obtained conveniently and at low cost.
Example two:
referring to fig. 3 and 5, a second embodiment of the present invention provides a high-voltage switching power supply, which includes the feedback loop of the high-voltage switching power supply, a control and output rectification circuit of the high-voltage switching power supply, a seventh capacitor C7, a first inductor L1, and an eighth capacitor C8; a first switch power supply rectification output signal end S1 of the high-voltage switch power supply feedback loop is connected with a switch power supply rectification output end Vro of the high-voltage switch power supply control and output rectification circuit, one end of a seventh capacitor C7 and one end of a first inductor L1, the other end of the seventh capacitor C7 is connected with one end of an eighth capacitor C8, the grounding end GND of the high-voltage switch power supply control and output rectification circuit, the grounding end GND of the high-voltage switch power supply feedback loop and the grounding end GND of the switch power supply output, the other end of a first inductor L1 is connected with the other end of an eighth capacitor C8, a second switch power supply rectification output signal end S2 and a switch power supply output end Vo of the high-voltage switch power supply feedback loop, a first switch power supply feedback end FB1 of the high-voltage switch power supply feedback loop is connected with a first feedback end FB3 of the high-voltage switch power supply control and output rectification circuit and a second switch power supply feedback end FB2 of the high-voltage switch power supply feedback loop is connected with the high-voltage switch power supply control and output rectification circuit And a second feedback terminal FB4 of the output rectifying circuit.
In the second embodiment of the present invention, the high-voltage switching power supply control and output rectification circuit includes an FB local circuit, an input pulse width modulation controller, a power switch local circuit, a transformer isolation output local circuit, and a rectifier diode D1; the cathode of the rectifier diode D1 is connected with the switch power supply rectification output end Vro of the high-voltage switch power supply control and output rectification circuit, the anode of the rectifier diode D1 is connected with the first end of the transformer isolation output local circuit, the second end of the transformer isolation output local circuit is connected with the input pulse width modulation controller and one end of the power switch local circuit, the third end of the transformer isolation output local circuit is connected with the grounding end GND of the high-voltage switch power supply control and output rectification circuit, the other ends of the input pulse width modulation controller and the power switch local circuit are connected with a first end of the FB local circuit, a second end of the FB local circuit is connected with a first feedback end FB3 of the high-voltage switch power supply control and output rectification circuit, and a third end of the FB local circuit is connected with a second feedback end FB4 of the high-voltage switch power supply control and output rectification circuit.
Fig. 6 is a specific circuit diagram of a high voltage switching power supply including a programmable reference.
In the embodiment of the utility model, the high-voltage switching power supply comprises the programmable reference, and the high-voltage switching power supply with adjustable output voltage with the highest output voltage of more than 36V to kV level can be obtained conveniently at low cost.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A high voltage switching power supply feedback loop, comprising: the circuit comprises a programmable reference, a phase compensation circuit, a photoelectric coupler U3, a potentiometer VR1, a seventh resistor R7, an eighth resistor R8 and a tenth resistor R10; the collector and the emitter of the photoelectric coupler U3 are respectively connected with a first feedback end FB1 of the switching power supply and a second feedback end FB2 of the switching power supply, the anode of the photoelectric coupler U3 is connected with one end of a tenth resistor R10 and a first rectification output signal end S1 of the switching power supply, the cathode of the photoelectric coupler U3 is connected with the other end of the tenth resistor R10, one end 1 of a phase compensation circuit and a cathode end K of a programmable reference, an anode end A of the programmable reference is connected with one fixed end of a potentiometer VR1 and a switching power supply output ground GND, a sliding end of the potentiometer VR1 is connected with the other fixed end of the potentiometer VR1 and one end of an eighth resistor R8, the other end of the eighth resistor R8 is connected with the other end 2 of the phase compensation circuit, an external input reference end REF of the programmable reference and one end of a seventh resistor R7, and the other end of the seventh resistor R7 is connected with a second rectification output signal end S2 of the switching power supply.
2. The high voltage switching power supply feedback loop of claim 1, wherein said programmable reference comprises a transistor Q1, an operational amplifier U1, an internal reference source; the collector or the drain of the transistor Q1 is connected to the cathode terminal K of the programmable reference, the emitter or the source of the transistor Q1 is connected to the ground terminal of the operational amplifier U1, the ground terminal of the internal reference source, the internal signal ground F and the anode terminal a of the programmable reference, the base or the gate of the transistor Q1 is connected to the output terminal of the operational amplifier U1, the power terminal of the operational amplifier U1 is connected to the input terminal of the internal reference source and the auxiliary power terminal VCC, the non-inverting input terminal of the operational amplifier U1 is connected to the external input reference terminal REF of the programmable reference, and the inverting input terminal of the operational amplifier U1 is connected to the output terminal of the internal reference source; the collector or drain of the transistor Q1 is open inside the cell circuit of the programmable reference.
3. The high voltage switching power supply feedback loop of claim 2 wherein said transistor Q1 comprises a bipolar transistor, a junction field effect transistor, a metal oxide semiconductor field effect transistor, a silicon carbide metal oxide semiconductor field effect transistor, and an insulated gate bipolar transistor.
4. The high voltage switching power supply feedback loop of claim 2 wherein said operational amplifier U1 comprises a rail-to-rail operational amplifier and a non-rail-to-rail operational amplifier.
5. The high voltage switching power supply feedback loop of claim 2 wherein said internal reference source comprises a programmable reference integrated circuit U2 and a sixth resistor R6; one end of the sixth resistor R6 is connected to the input end of the internal reference source, the other end of the sixth resistor R6 is connected to the cathode end and the reference end of the programmable reference integrated circuit U2 and the output end of the internal reference source, and the anode end of the programmable reference integrated circuit U2 is connected to the ground end of the internal reference source.
6. The high voltage switching power supply feedback loop of claim 2 wherein said programmable reference further comprises a filter circuit and a voltage divider circuit, said filter circuit comprising a fourth capacitor C4 and a fifth resistor R5, said voltage divider circuit comprising a third resistor R3 and a fourth resistor R4; one end of the fourth capacitor C4 is connected to one end of the fourth resistor R4, the ground terminal of the operational amplifier U1 and the ground terminal of the internal reference source, the other end of the fourth capacitor C4 is connected to the inverting input terminal of the operational amplifier U1 and one end of the fifth resistor R5, the other end of the fifth resistor R5 is connected to one end of the third resistor R3 and the other end of the fourth resistor R4, and the other end of the third resistor R3 is connected to the output terminal of the internal reference source.
7. The high voltage switching power supply feedback loop of claim 2 wherein said programmable reference further comprises a first resistor R1, a second resistor R2, a first capacitor C1, a second capacitor C2, and a third capacitor C3; two ends of the first resistor R1 are respectively connected to the output end of the operational amplifier U1 and the base or gate of the transistor Q1, two ends of the second capacitor C2 are respectively connected to the anode end a of the programmable reference and the base or gate of the transistor Q1, two ends of the first capacitor C1 are respectively connected to the power end and the ground end of the operational amplifier U1, two ends of the second resistor R2 are respectively connected between the anode end a of the programmable reference and the emitter or source of the transistor Q1, one end of the third capacitor C3 is connected to the output end of the internal reference source, and the other end of the third capacitor C3 is connected to the ground end of the internal reference source.
8. The high voltage switching power supply feedback loop of claim 1, wherein said phase compensation circuit comprises a fifth capacitor C5, a sixth capacitor C6, and an eleventh resistor R11; one end of the fifth capacitor C5 is connected to one end of a sixth capacitor C6 and one end 1 of the phase compensation circuit, the other end of the sixth capacitor C6 is connected to one end of an eleventh resistor R11, and the other end of the fifth capacitor C5 is connected to the other end of the eleventh resistor R11 and the other end 2 of the phase compensation circuit.
9. A high-voltage switching power supply, characterized in that the high-voltage switching power supply comprises the high-voltage switching power supply feedback loop of any one of claims 1 to 8, and further comprises a high-voltage switching power supply control and output rectifying circuit, a seventh capacitor C7, a first inductor L1, an eighth capacitor C8; a first switch power supply rectification output signal end S1 of the high-voltage switch power supply feedback loop is connected with a switch power supply rectification output end Vro of the high-voltage switch power supply control and output rectification circuit, one end of a seventh capacitor C7 and one end of a first inductor L1, the other end of the seventh capacitor C7 is connected with one end of an eighth capacitor C8, the grounding end GND of the high-voltage switch power supply control and output rectification circuit, the grounding end GND of the high-voltage switch power supply feedback loop and the grounding end GND of the switch power supply output, the other end of a first inductor L1 is connected with the other end of an eighth capacitor C8, a second switch power supply rectification output signal end S2 and a switch power supply output end Vo of the high-voltage switch power supply feedback loop, a first switch power supply feedback end FB1 of the high-voltage switch power supply feedback loop is connected with a first feedback end FB3 of the high-voltage switch power supply control and output rectification circuit and a second switch power supply feedback end FB2 of the high-voltage switch power supply feedback loop is connected with the high-voltage switch power supply control and output rectification circuit And a second feedback terminal FB4 of the output rectifying circuit.
10. The high voltage switching power supply of claim 9 wherein said high voltage switching power supply control and output rectification circuitry comprises FB local circuitry, input pwm controller and power switch local circuitry, transformer isolated output local circuitry, rectifier diode D1; the cathode of the rectifier diode D1 is connected with the switch power supply rectification output end Vro of the high-voltage switch power supply control and output rectification circuit, the anode of the rectifier diode D1 is connected with the first end of the transformer isolation output local circuit, the second end of the transformer isolation output local circuit is connected with the input pulse width modulation controller and one end of the power switch local circuit, the third end of the transformer isolation output local circuit is connected with the grounding end GND of the high-voltage switch power supply control and output rectification circuit, the other ends of the input pulse width modulation controller and the power switch local circuit are connected with a first end of the FB local circuit, a second end of the FB local circuit is connected with a first feedback end FB3 of the high-voltage switch power supply control and output rectification circuit, and a third end of the FB local circuit is connected with a second feedback end FB4 of the high-voltage switch power supply control and output rectification circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120749613.0U CN215833814U (en) | 2021-04-13 | 2021-04-13 | High-voltage switch power supply feedback loop and high-voltage switch power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120749613.0U CN215833814U (en) | 2021-04-13 | 2021-04-13 | High-voltage switch power supply feedback loop and high-voltage switch power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215833814U true CN215833814U (en) | 2022-02-15 |
Family
ID=80188044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120749613.0U Active CN215833814U (en) | 2021-04-13 | 2021-04-13 | High-voltage switch power supply feedback loop and high-voltage switch power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215833814U (en) |
-
2021
- 2021-04-13 CN CN202120749613.0U patent/CN215833814U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102801300B (en) | Primary-side feedback controlled switching power line loss compensating system and method | |
| CN205029559U (en) | Power switching circuit | |
| JPH0582148B2 (en) | ||
| CN110277897B (en) | Constant current control circuit and switching power supply circuit | |
| US11404959B2 (en) | DC/DC power converter | |
| CN106921303B (en) | Switching power supply transformer | |
| Adragna | Design equations of high-power-factor flyback converters based on the L6561 | |
| CN218068682U (en) | High-voltage switch power supply feedback loop and high-voltage switch power supply | |
| CN109639151A (en) | Constant-current control circuit and constant current control method for LLC resonant converter | |
| CN215833814U (en) | High-voltage switch power supply feedback loop and high-voltage switch power supply | |
| CN216449955U (en) | High-voltage switch power supply feedback loop and high-voltage switch power supply | |
| CN217981625U (en) | Voltage sampling detection circuit of switching power supply and switching power supply | |
| CN102958258B (en) | High power factor constant current driving circuit | |
| CN213690367U (en) | DC voltage stabilizing circuit based on comparison amplifier | |
| CN109149978A (en) | The reverse exciting switching voltage regulator of super wide voltage output controls chip power supply circuit | |
| CN203014698U (en) | Constant current control circuit with high power factor | |
| Kularatna | Modern component families and circuit block design | |
| CN111193424B (en) | Circuit for aging direct-current passive EMI filter | |
| CN210123940U (en) | Constant voltage source | |
| CN114374323A (en) | Isolated power supply circuit and electronic equipment | |
| CN203015187U (en) | Constant current driving circuit with high power factor | |
| WO2019056830A1 (en) | Current sampling circuit | |
| CN216215868U (en) | Overvoltage protection circuit of output port of Boost _ PFC circuit | |
| CN215452809U (en) | High-voltage power supply with wide input voltage range | |
| CN216312959U (en) | Auxiliary power supply circuit suitable for switching power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |