Control circuit and method for driving a half-bridge circuit

Details Control circuit and method for driving a half-bridge circuit Control circuit and method for driving a half-bridge circuit

2007-11-27

2007-11-27

Zweizig, Jeffrey (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

C327S073000

Reexamination Certificate

active

11411199

ABSTRACT:
A method is disclosed for controlling a first transistor in a half-bridge circuit which also includes a second transistor. The transistors can be controlled by applying drive voltages to their gates. During a switch-off operation of the second transistor, the amplitude of the drive voltage of the second transistor is compared with a first threshold value and a second threshold value. A switch-on operation for the first transistor is started following a specified first period which begins at a first time when the drive voltage of the second transistor undershoots the first threshold value. The first threshold value is set in accordance with a second period which begins at a second time when the amplitude of the drive voltage of the second transistor undershoots the second threshold value. The second period ends at another time when the first transistor adopts a specified initial operating state during the switch-on operation.

REFERENCES:
patent: 5408150 (1995-04-01), Wilcox
patent: 5959475 (1999-09-01), Zomorrodi
patent: 6353345 (2002-03-01), Yushan et al.
patent: 6828833 (2004-12-01), Guebels
patent: 2005/0122754 (2005-06-01), Nielsen
patent: 101 47 882 (2003-04-01), None
patent: WO 02/095914 (2002-11-01), None
“High-Efficiency Predictive Synchronous Buck Driver with Enable.” Data Sheet UCC27223, Texas Instruments Incorporated. Dec. 2003: pp. 1-30. (30 Pgs).

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