Patent ID: 7531913
Filing Date: 2009-05-12
Classification: H02J

Abstract:
1. An apparatus for providing voltages to a motherboard, the apparatus comprising: a power supply; a first converting unit comprising an input terminal, an output terminal, a first resistor, and a second resistor, the input terminal connected to the power supply, the first and second resistors being serially connected between the output terminal and ground; a first regulating unit comprising an input terminal, an output terminal, a first switch unit, a third resistor and a fourth resistor, the input terminal of the first regulating unit connected to the output terminal of the first converting unit, the output terminal of the first regulating unit connected to the motherboard, the first regulating unit feeding a voltage from the first converting unit to the motherboard, or regulating the voltage to be a predetermined voltage by operating the first switch unit to selectively allow either the third resistor to be connected in parallel with the first resistor or the fourth resistor to be connected in parallel with the second resistor; and a driving unit comprising an input terminal and en output terminal, the input terminal of the driving unit connected to the output terminal of the first regulating unit, the driving unit outputting a control signal to start up the motherboard according to the voltage from the first regulating unit.