AC to DC power converter control circuit

Abstract

The present invention provides a control circuit for an AC-to-DC power converter. The control circuit includes a junction field effect transistor, a first resistor, a second resistor and a third resistor. The junction field effect transistor includes a substrate, a drain, a source, a gate, a first oxide layer, and a second oxide layer. The first oxide layer is bonded to the area defined between the drain and the gate, and the second oxide layer Not bonded to the area defined between the drain and gate. The first resistor is set on the first oxide layer, and the second resistor and the third resistor are set on the second oxide layer. When the junction field effect transistor and the first resistor receive the input power signal, the first resistor, the second resistor and the third resistor can divide the input power signal to provide a divided signal, and can avoid the first oxide layer and The second oxide layer is broken down. The above-mentioned embodiments can simplify the circuit layout of the control circuit, so that the control circuit can be more robust and not easily damaged.

Description

technical field [0001] The invention relates to an AC-to-DC power converter, in particular to a control circuit for an AC-to-DC power converter capable of withstanding high voltage. Background technique [0002] With the increasing scarcity of energy, many industry standards require electronic products to use energy more efficiently to achieve the purpose of saving energy. Many electronic products use an AC-to-DC power converter to convert an input power signal into an appropriate output voltage signal or output current signal, so that the load of the AC-to-DC power converter can operate normally. Improving the energy efficiency of AC-to-DC power converters to save energy has become an important issue in the industry. [0003] Many control circuits of AC-DC power converters can set the AC-DC power converters in proper operation states by detecting the input power signal. For example, when the control circuit cannot detect the input power signal, it will discharge the anti-...

AI Technical Summary

Problems solved by technology

However, when these control circuits are implemented in the form of integrated circuits, great attention must be paid to the layout of circuit components such as resistors, otherwise the control circuit is easy to cause circuit components due to circuit layout errors or process differences. Destroyed by overvoltage

Therefore, the complexity of the hardware design of the control circuit is greatly increased, making it difficult to improve the yield of the product

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