Patent ID: 9030184
Filing Date: 2015-05-12
Classification: H02M

Abstract:
1. A DC-DC converter, comprising: an output unit, receiving an input voltage, and converting the input voltage into an output voltage; a control unit, coupled to the output unit, generating a first control signal according to the input voltage, an output feedback voltage relating to the output voltage, and a reference voltage, and controlling the output unit to generate the output voltage; and a trigger unit, coupled to the output unit and the control unit, generating a first trigger signal according to the control signal, the output feedback voltage and the reference voltage, wherein the trigger unit comprises: wherein when the output feedback voltage is less than the reference voltage by a preset value, the first trigger signal triggers the control unit to control the output unit to operate, wherein the control unit comprises a pulse width modulation generator, a sawtooth generator, a second error amplifier, a second comparator, and a driving unit, wherein the second error amplifier receives the output feedback voltage and the reference voltage, the second comparator is coupled to the second error amplifier and the sawtooth generator, the pulse width modulation generator is coupled to the sawtooth generator and the driving unit, and the sawtooth signal is outputted by the sawtooth generator.