Patent ID: 8963515
Filing Date: 2015-02-24
Classification: G01R,H02M

Abstract:
1. A current detection circuit for the power conversion circuit, wherein, the current detection circuit comprising a sample and hold circuit, a rising edge detection circuit, a falling edge detection circuit, a timing control circuit, a synchronous detection circuit, and a low-pass filter, wherein, the first terminal of the sample and hold circuit is connected with the third terminal of a drive control tube S 2 , the second terminal of the sample and hold circuit is connected with the first terminal of the timing control circuit, and the third terminal of the sample and hold circuit is connected with the first terminal of the synchronous detection circuit; the first terminal of the rising edge detection circuit is connected with the second terminal of a main switch S 1 , and the second terminal of the rising edge detection circuit is connected with the second terminal of the timing control circuit; the first terminal of the falling edge detection circuit is connected with the second terminal of main switch S 1 , and the second terminal of the falling edge detection circuit is connected with the third terminal of the timing control circuit; the fourth terminal of the timing control circuit is connected with the second terminal of the synchronous detection circuit, the third terminal of the synchronous detection circuit is connected with the first terminal of the low-pass filter, and the second terminal of the low-pass filter is the output terminal of the current detection circuit.