Inrush current prevention circuit for DC-DC converter, has on-off circuit that transmits or isolates modulation signal to switching unit based on control signal from electronic control unit, during power input

摘要

The circuit has an error amplifier that compares a reference voltage and filtered voltage to generate an error signal. A pulse width modulation (PWM) signal generator generates a PWM signal to switch on and off the switching unit according to the error signal. An on-off circuit (60) transmits or isolates the PWM signal to the switching unit based on a control signal from an electronic control unit (70), during power input.