US 6,982,574 B2
Method of forming a transistor driver and structure therefor
Paul J. Harriman, Goodyear, Ariz. (US); and Hsien-Te Kevin Shih, Glendale, Ariz. (US)
Assigned to Semiconductor Components Industries, LLC, Phoenix, Ariz. (US)
Filed on Mar. 22, 2004, as Appl. No. 10/805,405.
Prior Publication US 2005/0206436 A1, Sep. 22, 2005
Int. Cl. H03B 1/00 (2006.01)
U.S. Cl. 327—108 15 Claims
OG exemplary drawing
 
1. A method of forming a synchronous rectifier driver comprising:
coupling a disable circuit to receive a PWM signal and to responsively provide a disable signal when the PWM signal remains at a first state for at least a first time period;
coupling a first control channel to receive the disable signal and responsive generate a first drive signal suitable for disabling a lower output transistor; and
coupling the first control channel to receive the PWM signal and responsively generate the first drive signal suitable for enabling the lower output transistor when the PWM signal is at the first state for less than the first time period.