Patent ID: 8645753

Claim:
A power system with hot-swap, comprising: a front stage having an output terminal configured to provide a constant power supply, wherein the front stage having a front capacitor coupled between the output terminal and a reference ground; a hot-swap stage coupled to the output terminal of the front stage to receive the power supply, and to generate an output voltage based thereupon; wherein the hot-swap stage comprises: a buck converter having a switch; and a controller having a first input terminal, a second input terminal, and an output terminal, wherein the first input terminal is configured to receive a current sense signal indicative of a current flowing through the switch, the second input terminal is configured to receive a voltage feedback signal indicative of the output voltage, and wherein based on the current sense signal and the voltage feedback signal, the controller generates a switch control signal at the output terminal, to control the switch to operate at ON/OFF state, and wherein the hot-swap stage generates the output voltage with desired voltage value based on the ON/OFF operation of the switch; and a load stage coupled to the hot-swap stage to receive the output voltage.