Switching circuit for controlling switch in switching converter, has control circuit that provides control signal, on basis of generated synchronization signal, for controlling switch in switching converter

摘要

The switching circuit (400) has detection circuit (406) that compares an input voltage (V in) with predetermined voltage value (404), and generates pulse signal when the input voltage drops below predetermined voltage value. A signal generating circuit (412) coupled to the detection circuit is configured to generate synchronization signal (I sync) based on generated pulse signals. A control circuit is configured to provide control signal, on basis of generated synchronization signal, for controlling switch in switching converter. An independent claim is included for a method for controlling a switch in switching converter.