Low power mode detection circuit for a DC/DC converter

Details Low power mode detection circuit for a DC/DC converter Low power mode detection circuit for a DC/DC converter

2005-02-22

2005-02-22

Laxton, Gary L. (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S222000, C323S224000

Reexamination Certificate

active

06859020

ABSTRACT:
A DC/DC converter has a semiconductor switch coupled to an inductor, a capacitor and a rectifier. A comparator is coupled to across the rectifier to detect a polarity reversal during the second portion of converter operation to place the converter in a low power mode if the voltage across the rectifier is of an appropriate polarity for reverse current flow. The rectifier may be a synchronous rectifier transistor and the voltage converter placed in a low power mode when the polarity across the synchronous rectifier indicates that reverse current flow is possible. A timing circuit delays the generation of the control signal to place the converter in a low power mode until the steady state current is below a predetermined threshold for a predetermined amount of time. The synchronous rectifier may be turned OFF when the current through the converter falls below another predetermined threshold value and the voltage across the synchronous rectifier will become the voltage across the parasitic diode of the FET synchronous rectifier.

REFERENCES:
patent: 5481178 (1996-01-01), Wilcox et al.
patent: 5920475 (1999-07-01), Boylan et al.
patent: 6166527 (2000-12-01), Dwelley et al.
patent: 6307356 (2001-10-01), Dwelley
patent: 6414403 (2002-07-01), Kitagawa et al.
patent: 6437549 (2002-08-01), Takagishi

Affiliated with

Also associated with

Rating

Low power mode detection circuit for a DC/DC converter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Low power mode detection circuit for a DC/DC converter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low power mode detection circuit for a DC/DC converter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3461358