Patent ID: 8139381
Filing Date: 2012-03-20
Classification: H02M

Abstract:
1. A power converter comprising: a primary coil configured to receive an input voltage; a first switch including a first terminal coupled to the primary coil, a second terminal, and a control terminal; an output unit including a secondary coil, the output unit configured to output an output voltage, the primary coil and the secondary coil forming a transformer, and the input voltage being converted to the output voltage by the transformer; and a switching controller configured to receive a feedback voltage corresponding to the output voltage and a sensing voltage corresponding to a current flowing between the first terminal and the second terminal of the first switch, to determine whether to perform an operation of a burst mode based on the feedback voltage, to generate a control signal by comparing the sensing voltage with a comparison voltage during a first period of the burst mode, to generate the control signal by comparing the sensing voltage with a first voltage corresponding to the feedback voltage during a second period of the burst mode, the second period being subsequent to the first period, and to transmit the control signal to the control terminal of the first switch.