Accelerated response to load transients in PFM DC-to-DC...

Details Accelerated response to load transients in PFM DC-to-DC... Accelerated response to load transients in PFM DC-to-DC...

2008-11-20

2011-10-04

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

In shunt with source or load

Using choke and switch across source

C323S285000, C323S290000

Reexamination Certificate

active

08030907

ABSTRACT:
A pulse generator circuit in a DC-to-DC converter may be configured to generate pulses that have a frequency that increases in response to increases in the load on the DC-to-DC converter. The pulse generator circuit may be configured to cause each pulse to have a constant width. When the pulse reaches the end of the constant width and the magnitude of the current through an inductance in the converter is less than a threshold value, however, the pulse generator may be configured to extend the pulse until the magnitude of the current through the inductance reaches the threshold value. The pulse generator circuit may be configured to prematurely terminate each pulse if and at such time as the load voltage exceeds a target value by approximately half of the peak-to-peak voltage of the ripple component plus the noise component margin.

REFERENCES:
patent: 5770940 (1998-06-01), Goder
patent: 6163143 (2000-12-01), Shimamori
patent: 7019504 (2006-03-01), Pullen et al.
patent: 7812585 (2010-10-01), Zhou et al.
patent: 2005/0017703 (2005-01-01), Walters et al.

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