Symmetric sample and hold over-current sensing method and...

Details Symmetric sample and hold over-current sensing method and... Symmetric sample and hold over-current sensing method and...

2009-04-03

2011-10-25

Sterrett, Jeffrey (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S283000, C323S284000

Reexamination Certificate

active

08044644

ABSTRACT:
An over-current condition is detected in a synchronous DC-DC converter by sampling and holding a measured load current value. The load current is sampled while a low-side transistor is ON and then held when the low-side transistor is OFF. The held value is compared to a threshold value while the low-side transistor is OFF. The comparison occurs during the portion of the cycle when the low-side transistor is OFF so that a comparator has sufficient time in which to detect the over-current condition, even in high duty cycle applications.

REFERENCES:
patent: 5808455 (1998-09-01), Schwartz et al.
patent: 6430070 (2002-08-01), Shi et al.
patent: 7019507 (2006-03-01), Dittmer et al.
patent: 7045993 (2006-05-01), Tomiyoshi
patent: 7119522 (2006-10-01), Tomiyoshi
patent: 7372238 (2008-05-01), Tomiyoshi
patent: 7449869 (2008-11-01), Markowski
patent: 7479770 (2009-01-01), Kohout et al.
patent: 7741820 (2010-06-01), Huang et al.
patent: 2008/0129257 (2008-06-01), Lee
patent: 2008/0197823 (2008-08-01), Crowther et al.
patent: 2009/0224732 (2009-09-01), Kudo et al.
patent: 2010/0188062 (2010-07-01), Candage et al.
patent: 2011/0128654 (2011-06-01), Wu

Affiliated with

Also associated with

Rating

Symmetric sample and hold over-current sensing method and... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Symmetric sample and hold over-current sensing method and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Symmetric sample and hold over-current sensing method and... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4265129