Patent ID: 7109692

Claim:
A high-speed PWM control apparatus with adaptive voltage position, used in a DC—DC power transfer device, comprising: an auto-loading voltage position slope compensation unit, obtaining a current detection signal and a feedback voltage signal via a detection resistor, and automatically outputting a feedback voltage adjusting signal; an error signal comparison unit, connected with the compensation unit, for comparing the feedback voltage adjusting signal with a reference signal to output a modulation output signal; a logic control unit, connected with the error signal comparison unit, for receiving the modulation output signal and outputting a PWM setting signal; an on-time delay control unit, connected with the logic control unit, the input voltage and the reference voltage, for generating a PWM reset signal according to the PWM setting signal, the input voltage and the reference voltage; a flip-flop, connected with the logic control unit and the on-time delay control unit, for outputting a PWM driving signal according to the PWM setting signal and the PWM reset signal; a driving unit, connected with the flip-flop, for receiving the PWM driving signal to output a pair of complementary driving signals; and an off-time delay control unit, connected with the flip-flop and the logic control unit, for generating a PWM off-time signal according to the PWM driving signal and transmitting the PWM off-time signal to the logic control unit; thereby, when the loading is changed, the PWM control apparatus generates the PWM setting signal instantaneously to respond rapidly to the change of the loading and the power supply is stabilized.