Adaptive zero current sense apparatus and method for a...

Details Adaptive zero current sense apparatus and method for a... Adaptive zero current sense apparatus and method for a...

2011-05-10

2011-05-10

Nguyen, Viet Q (Department: 2827)

Static information storage and retrieval

Powering

C323S271000, C323S282000, C323S284000, C323S285000

Reexamination Certificate

active

07940596

ABSTRACT:
A switching regulator includes a low-side switch having a body diode. During the low-side switch is on, a zero-current sense circuit monitors the inductor current of the switching regulator and triggers a signal to turn off the low-side switch when the inductor current falls down to a zero-current threshold, to prevent reverse inductor current from the output terminal of the switching regulator. A body-diode turn-on time controller monitors the turn-on time of the body diode and adjusts the zero-current threshold according thereto, and the turn-on time of the body diode can be reduced to an optimal interval subsequently. The self-adjustable zero-current threshold is adaptive according to the application conditions, such as the inductor size, input voltage and output voltage of the switching regulator.

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patent: 2010/0308784 (2010-12-01), Scoones et al.

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