Current controlling mode direct current (DC)-DC converter

摘要

There is provided a current controlling mode DC-DC converter that operates in a PWM mode or a PFM mode by adjusting a turned-on time of a gate depending on power consumption of a load. The DC-DC converter includes a first comparator that receives a first input voltage and a second input voltage and outputs a first output signal, a second comparator that receives a reference voltage for mode switching and the second input voltage and outputs a second output signal, and a first logic element that outputs a reset signal for turning off a gate at a point of time when both the first output signal and the second output signal are applied. Examples may also include additional elements to facilitate mode switching.

主权项

1. A direct current (DC)-DC converter, comprising:
a first comparator configured to receive a first input voltage and a second input voltage and to output a first output signal; a second comparator configured to receive a reference voltage configured to indicate mode switching and the second input voltage and to output a second output signal, wherein the second input voltage is based on a sensing signal and a ramp signal; and a first logic element configured to output a reset signal based upon a determination that both the first output signal and the second output signal are applied to the first logic element, wherein the reset signal is configured to turn off a gate.