PWM SIGNAL GENERATING CIRCUIT AND METHOD FOR DC-DC CONVERTER USING DIMING SIGNAL AND LED DRIVING CIRCUIT FOR BACK LIGHT HAVING THE SAME

摘要

A pulse width modulation (PWM) signal generating circuit that generates a PWM signal for a DC-DC converter using a dimming signal is provided. The PWM signal generating circuit includes a normal PWM signal generator configured to generate a normal PWM signal based on a clock signal provided to the DC-DC converter, and a compensation PWM signal generator configured to generate a compensation PWM signal based on the clock signal and the dimming signal.