Semiconductor integrated circuit for controlling power...

Details Semiconductor integrated circuit for controlling power... Semiconductor integrated circuit for controlling power...

2007-01-30

2007-01-30

Laxton, Gary L (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S224000, C323S285000

Reexamination Certificate

active

11289484

ABSTRACT:
A semiconductor integrated circuit for controlling power supply which has a function of preventing a reverse current flowing in a coil under a light load condition and ensures good response of output voltage to load variation. In a synchronous rectification switching regulator having a reverse current detection circuit which can detect a reverse current flowing in an inductor (coil) and a reverse current prevention function, when a prescribed time has elapsed after detection of a reverse current based on a detection signal from the reverse current detection circuit or after the number of times of reverse current detection has reached a prescribed value, the reverse current prevention function is activated to turn Off a synchronous rectification switching device.

REFERENCES:
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patent: 6307356 (2001-10-01), Dwelley
patent: 6476589 (2002-11-01), Umminger et al.
patent: 7061218 (2006-06-01), Ito
patent: 7098632 (2006-08-01), Chen et al.
patent: 11-187651 (1999-07-01), None
patent: 2000-092824 (2000-03-01), None
patent: 2004-056992 (2004-02-01), None

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