Feedback circuit for power switching circuit

摘要

A power switching circuit has high and low side switches ( 6, 8 ). The load-side FET ( 8 ) has a main body part ( 30 ) and a sense FET part ( 32 ). The current sensing circuit ( 32 ) measured the low side current. A capacitance ( 56 ) couples the switch node ( 10 ) to a current signal node ( 52 ) to provide a combined signal on current output ( 58 ), the combined signal including the low side current and timing information.