REDUCING POWER CONSUMPTION OF A SYNCHRONOUS RECTIFIER CONTROLLER

摘要

The embodiments herein describe a switched mode power converter. In particular, the embodiments herein disclose techniques for reducing power consumption of a synchronous rectifier controller of the switched mode power converter. The switched mode power converter includes a plurality of circuit components that control operation of a synchronous rectifier included in the switched mode power converter. One or more of the circuit components may be disabled to reduce power consumption.

主权项

1. A switching power converter comprising:
a magnetic component coupled to an input voltage and an output of the switching power converter; a switch coupled to the magnetic component, energy stored in the magnetic component when the switch is in an on state; a first controller configured to generate a first control signal to turn on or turn off the switch during each switching cycle of the switch to maintain regulation of the output of the switching power converter; a synchronous rectifier switch configured to rectify an output voltage at the output of the switching power converter, the synchronous rectifier switch having at least a first terminal and a second terminal, the first terminal coupled to the magnetic component; a plurality of circuit components configured to output trigger signals based on a voltage at a terminal of the synchronous rectifier switch, the trigger signals controlling operation of the synchronous rectifier switch; and a second controller configured to receive the trigger signals and is configured to generate a second control signal to turn on or turn off the synchronous rectifier switch during a plurality of switching cycles of the synchronous rectifier switch based on the trigger signals; wherein the second controller is further configured to disable one or more of the plurality of circuit components during a switching cycle of the synchronous rectifier switch after the synchronous rectifier switch is turned off during the switching cycle.