Auto-switching converter with PWM and PFM selection

Details Auto-switching converter with PWM and PFM selection Auto-switching converter with PWM and PFM selection

2007-02-06

2007-02-06

Sterrett, Jeffrey (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S285000, C323S901000, C327S175000, C363S041000, C363S049000, C363S095000

Reexamination Certificate

active

10915398

ABSTRACT:
An auto-switching converter with PWM and PFM selection supplies a boosted DC power to a load through a power switch unit. A starter outputs a starting-enabling signal. An auto PWM/PFM controller is connected to the starter for outputting a selection signal. A controller and a PFM controller are connected to the auto PWM/PFM controller, the power switch unit and the load for transmitting a PWM control signal and a PFM control signal to the power switch unit, respectively, for controlling the switching action of the power switch unit.

REFERENCES:
patent: 5568044 (1996-10-01), Bittner
patent: 5905370 (1999-05-01), Bryson
patent: RE37609 (2002-03-01), Bittner
patent: 6489756 (2002-12-01), Kanouda et al.
patent: 6611132 (2003-08-01), Nakagawa et al.
patent: 7061213 (2006-06-01), Yoshida

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