Patent ID: 6353546
Filing Date: 2002-03-05
Classification: G05F,H02M

Abstract:
A coilless AC/DC power supply device, comprising:an AC voltage input terminal; a rectifier circuit, used to receive and rectifier the input AC voltage so as to output a rectified DC voltage; a charging device, connected to the output terminal of said rectifier circuit at its input terminal and connected to the load at its output terminal so as to output a DC voltage; and a voltage detecting device, connected to the output terminal of said charging device at its input terminal and connected in a feedback configuration to the input control terminal of said charging device, so as to limit the charging voltage range of said charging device, said voltage detecting device including a reference voltage source and a comparison circuit connected to said reference voltage source at one of its input terminals, connected to the output terminal of a charging circuit of said charging device, and connected in feedback configuration to an input control terminal of a control circuit of said charging device for comparing the voltages of the charging devices with the voltage of said reference voltage source.