Electrical power supply with single output from range of input v

Details Electrical power supply with single output from range of input v Electrical power supply with single output from range of input v

1994-09-07

1996-12-24

Wong, Peter S.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363127, H02M 706

Patent

active

055878954

ABSTRACT:
An electric power supply that accommodates a wide range of input voltages utilizes a half wave rectifier connected to the input of a MOSFET switching transistor the output of which is connected to a power supply filter capacitor and a zener diode voltage regulator. A fold-back transistor is connected to the zener diode and is operable upon conduction of the zener diode to turn on just enough to cause the switching transistor to turn off just enough to maintain the voltage set by the zener diode and maintain the charge on the power supply filter capacitor. A latch transistor is connected to the MOSFET transistor and is operable during conduction of the fold-back transistor to cause the switching transistor to turn off. During the negative half cycle of the source voltage to the half wave rectifier, the power supply is turned off and the capacitor supplies all of the voltages and current to the circuit.

REFERENCES:
patent: 4641233 (1987-02-01), Roy
patent: 5126652 (1992-06-01), Carlin
patent: 5128854 (1992-07-01), Raets
patent: 5132893 (1992-07-01), Klein et al.

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