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ORIENT-CHIP has been granted a utility model patent:

Article Source：Qichacha | Author：Securities Star | Issuing Time：2024.04.19
Securities Star News: According to data from Qichacha, ORIENT-CHIP (688061) has recently obtained a utility model patent authorization, titled "A zero crossing detection circuit for improving the light load efficiency of switching power supplies". The patent application number is CN202322136766. X, and the authorization date is April 19, 2024.

Patent Abstract

This utility model provides a zero crossing detection circuit for improving the light load efficiency of a switching power supply. The zero crossing detection circuit includes a current sampling circuit, with the input end connected to the switching voltage node and the output end of the switching power supply, and the output end connected to the input end of the offset processing circuit. During the phase of inductor current decrease, the circuit outputs a sampling current proportional to the current flowing through the rectifier tube; The input end of the circuit is connected to the output end of the current sampling circuit, and the output end is connected to the input end of the logic control unit. It compares the sampling current in the rising phase of the inductor current with the sampling current in the falling phase during the inductor current decrease phase. When the comparison results are equal, a corresponding logic unit jump signal is generated. This logic unit jump signal causes the logic control unit to generate a second clock signal to control the closing of the rectifier tube. The zero crossing detection circuit of this utility model improves the accuracy and timeliness of the zero crossing detection function, thereby improving the conversion efficiency of the switching power supply under light load.


Attached drawings of patent abstract

Since the beginning of this year, ORIENT-CHIP has obtained 10 new patent authorizations, an increase of 66.67% compared to the same period last year. Based on the company's mid year financial data for 2023, the company invested 54.4176 million yuan in research and development in the first half of 2023, a year-on-year increase of 85.04%.
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