POWER SUPPLY DEVICE WITH OVER-VOLTAGE PROTECTION

摘要

A power supplying device includes a power supplying unit, a first switching element, a compensating unit, a controller, and an over-voltage protecting unit. The power supplying unit includes a main power-outputting terminal, a standby power-outputting terminal, a DC to DC power converter, and a first sensing resistor. The DC to DC power convertor includes a power-outputting terminal The first sensing resistor is electrically connected to the power-outputting terminal and the main power-outputting terminal The first switching element is electrically connected to the first sensing resistor and the main power-outputting terminal The compensating unit is electrically connected to the main power-outputting terminal The controller is electrically connected to the compensating unit and the power supplying unit. The over-voltage protecting unit is electrically connected to the main power-outputting terminal, the first switching element, the standby power-outputting terminal, the power-outputting terminal, and the compensating unit.

主权项

1. A power supplying device with over-voltage protection electrically connected to an electronic system, the power supplying device with over-voltage protection comprising:
a power supplying unit comprising: a main power-outputting terminal electrically connected to the electronic system; a standby power-outputting terminal electrically connected to the electronic system; a direct current (DC) to DC power converter comprising a power-outputting terminal; a first sensing resistor electrically connected to the power-outputting terminal and the main power-outputting terminal; and a second sensing resistor electrically connected to the power-outputting terminal and the standby power-outputting terminal; a first switching element electrically connected to the first sensing resistor and the main power-outputting terminal; a compensating unit electrically connected to the main power-outputting terminal; a controller electrically connected to the compensating unit and the power supplying unit; and an over-voltage protecting unit comprising: a first comparator comprising two inputting terminals and an outputting terminal, one of the inputting terminals electrically connected to the main power-outputting terminal, and the outputting terminal electrically connected to the first switching element; a second comparator comprising two inputting terminals and an outputting terminal, one of the inputting terminals electrically connected to the standby power-outputting terminal; and a third comparator comprising two inputting terminals and an outputting terminal, one of the inputting terminals electrically connected to the power-outputting terminal, and the outputting terminal electrically connected to the compensating unit.