Level shifted drive for clamp device

Details Level shifted drive for clamp device Level shifted drive for clamp device

2005-02-15

2005-02-15

Riley, Shawn (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S056110

Reexamination Certificate

active

06856523

ABSTRACT:
A DC/DC converter device is provided that employs a clamp device to limit the peak voltage of a main power switch coupled to a primary winding of a transformer. The clamp device is driven employing a driver circuit coupled to a level shifter circuit. The level shifter circuit shifts the voltage level transitions of a clamp device drive signal from a first voltage level to a second voltage level range to drive the clamp device with a voltage that is outside a voltage range of an input supply voltage.

REFERENCES:
patent: 4672517 (1987-06-01), Mandelcorn
patent: 5282123 (1994-01-01), Boylan et al.
patent: 5973939 (1999-10-01), Tan
patent: 5978238 (1999-11-01), Liu
patent: 6069799 (2000-05-01), Bowman et al.
patent: 6452818 (2002-09-01), Simopoulos
patent: 6473317 (2002-10-01), Simopoulos
“Single Ended Active Clamp/Reset PWM”,SLUS292A, Feb. 1999-Revised Jan. 2002, p. 1-11.

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