Control circuit of alternating current-to-direct current converter

Abstract

The invention brings forward a control circuit of an alternating current-to-direct current converter. The control circuit comprises a junction type field effect transistor, a first resistor, a second resistor and a third resistor. The junction type field effect transistor consists of a substrate, a drain electrode, a source electrode, a grid electrode, a first oxidation layer and a second oxidation layer; the first oxidation layer is connected to a region that is defined between the drain electrode and the grid electrode; and the second oxidation layer is not connected to the region that is defined between the drain electrode and the grid electrode. The first resistor is arranged at the first oxidation layer; and the second resistor and the third resistor are arranged at the second oxidation layer. When the junction type field effect transistor and the first resistor receive input power source signals, the first resistor, the second resistor, and the third resistor can carry out voltage division on the input power source signals, thereby providing voltage dividing signals and preventing the first oxidation layer and the second oxidation layer from being punctured. According to the embodiment of the invention, the layout mode of the control circuit can be simplified, so that the control circuit can be strengthened to be not easy to damage.

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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