PWM GENERATOR FOR BRIDGE-TIED LOAD TYPE DRIVER

摘要

PURPOSE: A PWM generator for a bridge-tied load type driver is provided to secure a stable signal by generating an PWM signal around the center of a reference counter. CONSTITUTION: A pulse width modulation signal generator for an BTL driver comprises a reference counter(500), PWM start signal generators(100a,100b), PWM sign-off generators(200a,200b), and PWM signal decision equipments(300a,300b). The PWM start signal generator outputs a signal having start time point information of the PWM signal pulse according to the input signal. A PWM sign-off generator outputs a signal having the end-point information of the PWM signal according to the input signal. The PWM signal decision equipment outputs the PWM signal according to the output signal of the PWM start signal generator, the output signal of the PWM sign-off generator, and the reference counter signal.