Power converter with automatic on-time extension function and operating method thereof

摘要

A power converter is disclosed. The power converter includes a comparator and a timing generator. The comparator compares a first input signal with a second input signal to provide a control signal. The timing generator is coupled to the comparator. The timing generator includes a plurality of timing generating units, a logic unit, and a calculation unit. The timing generator generates a plurality of timing signals through the timing generating units and the logic unit according to the control signal, and the calculation unit forms a pulse width modulation (PWM) signal according to the timing signals. At least a part of the timing signals are overlapped.

主权项

1. A power converter, comprising:
a comparator, comparing a ramp signal with an error signal to provide a control signal; and a timing generator, coupled to the comparator, the timing generator comprising a plurality of timing generating units, a logic unit, and a calculation unit, the timing generator generating a plurality of timing signals through the timing generating units and the logic unit according to the control signal, and the calculation unit forming a pulse width modulation (PWM) signal according to the timing signals,wherein at least a part of the timing signals are overlapped, and the logic unit comprises a plurality of flip-flops coupled between the comparator and the calculation unit.