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High-voltage power supply method, circuit, chip, and system

A high-voltage power supply circuit and high-voltage power supply technology, applied in the field of circuits, high-voltage power supply methods, chips and systems, can solve the problems of unguaranteed circuit stability and reliability, high voltage, etc., and achieve the effect of improving reliability and scalability

Pending Publication Date: 2020-01-10
SHENZHEN FM ELECTRONICS GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantages of this high-voltage power supply circuit are: 1. The voltage inside the operational amplifier EA1 is higher than Vcc, and the operational amplifier EA1 needs to use a high-voltage tube to take power from the VJ terminal
2. In the start-up phase, Vcc is 0, and the reference voltage source Vr1 cannot work normally. The stability and reliability of the circuit cannot be guaranteed before the power-on process until the reference voltage source Vr1 works normally.
3. The power supply voltage Vcc can only provide a single load capacity. If multiple VT switch tubes are connected, the noise between different Vcc will interfere with each other through the feedback voltage Vfb

Method used

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  • High-voltage power supply method, circuit, chip, and system
  • High-voltage power supply method, circuit, chip, and system
  • High-voltage power supply method, circuit, chip, and system

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A high-voltage power supply method, see figure 2 , including the following steps:

[0035] S1: The high-voltage conversion module receives the input high-voltage voltage, outputs a low-voltage voltage, and transmits the low-voltage voltage to the self-starting voltage divider circuit and the multi-channel noise isolation output circuit;

[0036] Specifically, the high voltage conversion module is used to convert the high voltage VM into a low voltage VJ for output.

[0037] S2: The self-starting voltage divider circuit receives the low-voltage voltage, outputs a feedback voltage to the voltage regulation circuit, and outputs a control voltage;

[0038] Specifically, the self-starting voltage dividing circuit is used to receive the low-voltage voltage VJ, provide circuit starting and feedback sampling functions to the voltage regulation circuit, and output the control voltage VG.

[0039] S3: the voltage regulation circuit receives the reference voltage and the feedba...

Embodiment 2

[0045] A high-voltage power supply circuit, see image 3 , including a high-voltage conversion module, a self-starting voltage divider circuit, a voltage regulation circuit and a multi-channel noise isolation output circuit;

[0046]The input terminal of the high-voltage conversion module is connected to the high-voltage voltage, the output terminal of the high-voltage conversion module is connected to the input terminal of the self-starting voltage divider circuit and the multi-channel noise isolation output circuit, the output terminal of the self-starting voltage divider circuit is connected to the input terminal of the voltage regulation circuit, The output terminal of the voltage regulation circuit compensates the output terminal of the self-starting voltage divider circuit, and the output terminal of the voltage regulation circuit is connected to a multi-channel noise isolation output circuit, and the multi-channel noise isolation output circuit outputs a power supply vol...

Embodiment 3

[0062] A high-voltage power supply chip includes the above-mentioned high-voltage power supply circuit.

[0063] In the startup stage, the chip can also be started by the self-start voltage divider circuit when there is no reference voltage, and output a stable control voltage to improve the reliability of the startup stage. In addition, the operational amplifier EA of this chip has a low power supply voltage, and the internal operation amplifier EA can be implemented with a low-voltage tube, and there is no need to use a high-voltage tube to take power from the VJ terminal. At the same time, the chip outputs multiple different power supply voltages through a multi-channel noise isolation output circuit, which can provide a variety of load capabilities, and the noise isolation between different power supply voltages improves scalability.

[0064] The chips provided in the embodiments of the present invention are for brief description, and for those not mentioned in the embodim...

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PUM

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Abstract

The invention provides a high-voltage power supply method. A high-voltage conversion module receives an inputted high-voltage voltage, outputs a low-voltage voltage, and transmits the low-voltage voltage to a self-starting voltage division circuit and a multi-path noise isolation output circuit; the self-starting voltage division circuit receives the low-voltage voltage, outputs a feedback voltageto a voltage regulation circuit and outputs a control voltage; the voltage regulating circuit receives a reference voltage and the feedback voltage and outputs the voltage to compensate the control voltage, so that the control voltage tends to be stable; and the multi-path noise isolation output circuit receives the low-voltage voltage and the control voltage and outputs a multi-path noise isolated power supply voltage to provide power for an external switching tube. Therefore, the reliability and expansibility are improved.

Description

technical field [0001] The invention belongs to the technical field of new energy chip control, and in particular relates to a high-voltage power supply method, a circuit, a chip and a system. Background technique [0002] At present, LED lighting is a new technology. Compared with traditional lighting sources, LED lighting sources have the advantages of energy saving and environmental protection. Especially in recent years, my country has increasingly advocated the concept of energy conservation and environmental protection, and the application of LED lighting has become more and more extensive. For the control chip of LED lighting, it is more convenient for practical application to take power from the mains 220V high voltage, so the high-voltage power supply circuit is used as the mains and the LED control circuit to directly connect to the circuit, which saves the cost of peripheral components. [0003] Existing high-voltage power supply circuits such as figure 1 As sho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/293H05B33/08H05B44/00
CPCH02M5/293H02M5/2932
Inventor 丁士轩胡渊
Owner SHENZHEN FM ELECTRONICS GRP CO LTD
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