High and low voltage D. C. power supply

Details High and low voltage D. C. power supply High and low voltage D. C. power supply

1999-11-22

2000-10-24

Riley, Shawn

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363 19, H02M 3335, H02M 542, H02M 704

Patent

active

061377015

ABSTRACT:
A circuit for providing a D.C. voltage of high value from the output of a rectifying bridge on a capacitor of high capacitance, and for providing low supply voltages, including a first diode connected between the output of the rectifying bridge and the capacitor, first and second cascode-mounted transistors, circuitry for setting the potential of the control terminal of the first transistor, circuitry for reducing the potential of this control terminal when the rectified voltage exceeds a predetermined value, a regulation circuit connected at the connection node of the first and second transistors, and circuitry for applying, to the second transistor, a turn-on pulse of determined duration after the output voltage of the bridge has exceeded the determined value.

REFERENCES:
patent: 4652984 (1987-03-01), van der akker et al.
patent: 4965506 (1990-10-01), Algra et al.
patent: 5479330 (1995-12-01), Bergk
patent: 5798914 (1998-08-01), Wuidart et al.
patent: 5847940 (1998-12-01), Heeringa
patent: 5852549 (1998-12-01), Heeringa
French Search Report from French Patent Application 98 14918, filed Nov. 24, 1998.

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