I am trying very hard to understand this. I have seen one half bridge ic from TI or any other IC why it accepts a PWM signal alone. Based on the inputs INA and INB it switches the outputs OUTA and OUTB which are given to gate inputs. Now my doubt is why a pwm signal should be given as input to the IC. Please help. If i have not provided sufficient information please tell me. Other doubt is suppose if i switch on the inputs with pwms of 50% duty cycle what does it mean. The output of the half bride ic also will be a pwm? I am very confused.