High efficiency voltage converter and regulator circuit

Details High efficiency voltage converter and regulator circuit High efficiency voltage converter and regulator circuit

1997-03-18

1998-09-01

Nappi, Robert

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363 53, 363126, H02M 542

Patent

active

058019332

ABSTRACT:
A voltage converter and a method for converting AC to DC. A MOSFET (42, 118) conveys current from a full wave rectifier to charge a capacitor (60) that supplies current to a load (64). In a first embodiment, two transistors (32, 34) are connected as a differential pair to control the voltage applied to the gate of the MOSFET, referenced to a zener voltage developed across zener diode (36) that is connected to the emitters of the two transistors. In a second embodiment, a single transistor controls the voltage applied to the gate of the MOSFET, relative to a zener voltage of a zener diode (132). The MOSFET charges the capacitor while the voltage applied to its gate from the rectified signal is greater than the voltage across the capacitor.

REFERENCES:
patent: 3947752 (1976-03-01), Morgan
patent: 4641233 (1987-02-01), Roy
patent: 4685046 (1987-08-01), Sanders
patent: 5126652 (1992-06-01), Carlin

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