Switch control circuit and converter using the same

摘要

A switch control circuit for controlling an average current flowing into a load through a current control switch that is series-coupled to an input power and the load includes a sensing unit configured to measure a current flowing into the load, a folder unit configured to fold a sensing signal related to the measured current based on a first reference voltage to generate first and second folder output signals based on an initialization voltage, the first and second folder output signals being symmetric to each other, a comparison unit configured to compare the generated first and second folder output signals and a control unit configured to control an operation of the current control switch according to a comparison result in the comparison unit. Such a switch control circuit integrates and compares a sensing signal and a reference signal to effectively perform an average current control.

主权项

1. A switch control circuit for controlling an average current flowing into a load through a current control switch that is series-coupled to an input power and the load, the switch control circuit comprising:
a sensing unit configured to measure a current flowing into the load; a folder unit configured to fold a sensing signal related to the measured current based on a first reference voltage to generate first and second folder output signals based on an initialization voltage, the first and second folder output signals being symmetric to each other; a comparison unit configured to compare the generated first and second folder output signals; and a control unit configured to control an operation of the current control switch according to a comparison result of the comparison unit.