Patent ID: 11139743

Abstract:
An AC-DC converter with synchronous rectifier (SR) architecture and method for operating the same are described. Generally, a secondary side integrated circuit (IC) controller of the AC-DC converter includes a SR-SNS pin, a VBUS_IN pin, a first voltage-to-current converter, a sample-and-hold (S/H) circuit, a second voltage-to-current converter, and a signal generation circuit. The first voltage-to-current converter is coupled to remove a component of the output bus voltage sensed on the VBUS_IN pin from the voltage sensed on the SR-SNS pin. The S/H circuit is coupled to sample the voltage sensed on the SR-SNS pin and to provide a sampled voltage. The second voltage-to-current converter is coupled to convert the sampled voltage to a feed-forward current. The signal generation circuit is coupled to receive the feed-forward current and to generate feed-forward signals used to control operation of a primary side of the AC-DC converter.