Small Power Uninterrupted Power Supply Circuit

Published:2011/7/13 7:24:00 Author:Michel | Keyword: Small Power, Uninterrupted, Power Supply Circuit | From:SeekIC

The above picture is a small power uninterrupted power supply circuit.It consists of lift circuit, constant current circuit, terminate circuit, switching circuit, power switching circuit, power switching circuit, power detection circuit and termination voltage detection circuit etc.In the lift circuit,the two longest-serving outfield and resistance R2, R1and capacitance C1 constitute oscillating circuit and it uses six longest-serving outfield in parallel way to strengthen the drive ability.Diode VD1 and VD2 and capacitance C2 constitute 2 times voltage circuit.Constant current circuit uses basic circuit, diode VD3 and VD4 to offset voltage between the transistor VT1 and basic emitting.The blackout detection circuit, M5193BL (1) can use set the external resistance,R3 to set detecting voltage and the output is a very open type, detection set voltage is 4.5 V.



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