Patent ID: 7884589
Filing Date: 2011-02-08
Classification: G05F

Abstract:
1. A controllable power supply device with a step-up function, the controllable power supply device comprising: a constant voltage generator for providing, an initial voltage; a programmable voltage generator which is coupled to the constant voltage generator and is used for receiving the initial voltage and adjusting the received initial voltage to boost the received initial voltage to a power supply voltage; a first switch having a first connecting terminal, a second connecting terminal and a third connecting terminal, wherein the first connecting terminal is used for receiving the initial voltage, the second connecting terminal is used for receiving the power supply voltage, and the third connecting terminal is coupled to one of the first connecting terminal and the second connecting terminal; and a linear regulator having an input terminal, wherein when the input terminal is coupled to the third connecting terminal, the voltage received by the input terminal of the linear regulator is stabilized and outputted as the output voltage of the controllable power supply device by the linear regulator.