Patent ID: 7701188
Filing Date: 2010-04-20
Classification: H02M,Y02B

Abstract:
1. A synchronous rectification switching regulator, comprising: an output terminal; a first switching device configured to perform switching according to a first input control signal to store energy across an inductor; a second switching device configured to perform switching according to a second input control signal for the inductor to release energy from the inductor; a control circuit unit configured to provide the respective first and second input control signals to the first and second switching devices to maintain an output voltage output from the output terminal at approximately a constant voltage and cause the second switching device to perform switching opposite to the switching of the first switching device; and a reverse current detection circuit unit configured to detect an indication of a reverse current flowing in the direction from the output terminal to the second switching device and make the control circuit unit turn off the second switching device when an indication of the reverse current is detected, wherein the reverse current detection circuit unit stops detecting an indication of the reverse current while the second switching device is turned off due to the indication of the reverse current.