Patent ID: 7881027
Filing Date: 2011-02-01
Classification: B29C,F16D,H02H,H02M

Abstract:
1. A regulator for a switched mode power supply, the regulator comprising: switching regulator logic coupled to receive a feedback signal and to generate a switching signal in response to the feedback signal to control power delivered to an output of the switched mode power supply; a counter coupled to receive the feedback signal, wherein the feedback signal periodically cycles between a first state and a second state when the switched mode power supply operates normally and wherein an output of the counter indicates an auto-restart mode of the regulator in response to the feedback signal remaining in the first state for a predetermined count due to a fault condition; and a logic gate having a first input coupled to receive the switching signal, a second input coupled to receive the output of the counter, and an output that is to be coupled to a power switch, wherein the output of the logic gate enables the power switch to turn on and off in response to the switching signal when the output of the counter does not indicate the auto-restart mode and wherein the output of the logic gate disables the power switch in response to the output of the counter indicating the auto-restart mode.