Patent ID: 9685865
Date: 2017-06-20
CPC Classifications: H02M,Y02B

Claim:
1. A power-supply apparatus comprising: a high-side transistor and a low-side transistor coupled in series, the high-side transistor being coupled with a power supply voltage and the low-side transistor being coupled with a ground voltage; an inductor having an input side and an output side, the input side of the inductor being coupled with the high-side transistor and the low-side transistor and the output side being configured to couple with an external load; a signal generation circuit coupled with the input side and the output side of the inductor, the signal generation circuit being configured to generate a first voltage signal based on a first current flowing to the inductor; a trans-conductance amplifier whose input side is coupled with the signal generation circuit, the trans-conductance amplifier being configured to output a second current based on the first voltage signal; a first control unit including a driver circuit driving the high-side transistor and the low-side transistor; a second control unit controlling the first control unit, the second control unit being configured to output a first feedback signal based on a voltage of the output side of the inductor; and a converter coupled with an output side of the trans-conductance amplifier, the converter being configured to convert the second current into a second feedback signal, wherein the high-side transistor and the low-side transistor are controlled based on the first feedback signal and the second feedback signal.