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

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...

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

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