Switched-mode power supply

Details Switched-mode power supply Switched-mode power supply

1999-06-11

2000-12-26

Berhane, Adolf Deneke

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363131, H02M 3335

Patent

active

061669237

ABSTRACT:
The switched-mode power supply comprises a secondary winding and four diodes for producing two rectified voltages of the same polarity, one of which can be regulated. A connection of the unregulated voltage has connected to it a variable Zener diode as an error amplifier for transmitting a regulating signal to the primary side. The driver stage provides a pulse-width-modulated square-wave signal for driving the switching transistor which is arranged at a high potential between the operating voltage on the input side and a first connection of the primary winding. The second connection of the primary winding is connected with a Zener diode and provides a stabilized voltage for the driver stage. Arranged between the driver stage and the control electrode of the switching transistor there is a differentiating element which produces positive and negative switching voltages for controlling the switching transistor.

REFERENCES:
patent: 4370701 (1983-01-01), Western
patent: 4885673 (1989-12-01), Philippe
patent: 5390100 (1995-02-01), Palata
patent: 5499175 (1996-03-01), Noro
patent: 5515256 (1996-05-01), Yokoyama
Patent abstracts of Japan, vol. 018, No. 308, Jun. 1994 & JP 06062573, Mar. 4, 1994.

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