Digital loop for regulating DC/DC converter with segmented...

Details Digital loop for regulating DC/DC converter with segmented... Digital loop for regulating DC/DC converter with segmented...

2006-02-07

2006-02-07

Riley, Shawn (Department: 2838)

Electric power conversion systems

Current conversion

With voltage multiplication means

C327S536000

Reexamination Certificate

active

06995995

ABSTRACT:
A power control circuit is provided containing a switch array, which includes segmented switches, a flying capacitor, an output voltage terminal, a feedback loop, and a digital voltage regulator block. The digital voltage regulator block includes an A/D converter, an encoder, an add-subtractor, and a gate logic. These power control circuits do not include pass transistors. A method is also provided, where the charge pumps of the power control circuit are operated in two-phase cycles including a charging phase and a pumping phase. The power control circuit is controlled in both of these phases, thereby reducing the ripple of the output voltage.

REFERENCES:
patent: 6512411 (2003-01-01), Meng et al.
patent: 6657875 (2003-12-01), Zeng et al.
patent: 2002/0110009 (2002-08-01), Hiroyuki
patent: 1 237 265 (2002-09-01), None
patent: 2 231 804 (1998-08-01), None
patent: 2005/057765 (2005-06-01), None
Texas Instruments TPS60500, “High Efficiency, 250-mA Step-Down Charge Pump,” Oct. 2001—Revised Feb. 2002, pp. 1-19.
Linear Technology LTC3251, “500mA High Efficiency, Low Noise, Inductorless Step-Down DC/DC Converter,” 2003, pp. 1-12.

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