Patent ID: 8923019
Filing Date: 2014-12-30
Classification: H02M,Y02B

Abstract:
1. A DC/DC converter comprising: an output circuit having a load; a rectangular wave generator for converting an input voltage into driving pulses; a resonant tank for providing a first voltage based on the driving pulses for the output circuit; a detection unit for detecting a signal related to a state of the load; and a control unit for controlling the rectangular wave generator in a hiccup mode to reduce a ratio of a current work period to a stop period when the state of the load is a light-load or a no-load, wherein the ratio of a current work period to a stop period in the light-load or the no-load is smaller than a ratio of a current work period to a stop period when the duty ratio is 50% in the light-load or the no-load wherein a working frequency of the driving pulses is higher than a resonance frequency of the resonance tank, and the duty ratio of the driving pulses is within a predetermined range, so that a voltage gain of the DC/DC converter is higher than another voltage gain under the condition of 50% duty ratio.