Patent ID: 9112425
Filing Date: 2015-08-18
Classification: H02M,Y02B

Abstract:
1. A controller for use in a power converter, comprising: a load sensing circuit coupled to output an error signal in response to a feedback signal representative of an output of the power converter, wherein the error signal is proportional to a load coupled to an output of the power converter; an offset current generator circuit coupled to output an offset current in response to the error signal; a drive circuit coupled to control switching of a power switch to control a transfer of energy from an input of the power converter to the output of the power converter in response to the error signal, the offset current, and a current sense signal representative of a current through the power switch; and a burst mode control circuit coupled to output a burst mode control signal in response to the error signal, wherein the drive circuit is further coupled to control switching of the power switch in response to the burst mode control signal, wherein the drive circuit includes a latch coupled to output a drive signal to control the switching of the power switch, wherein the latch is coupled to be set in response to a clock signal, wherein the latch is coupled to be reset in response to the error signal, the current sense signal and the offset current, and wherein the latch is coupled to be disabled from being set in response to the burst mode control signal.