Multi-path digital power supply controller

Details Multi-path digital power supply controller Multi-path digital power supply controller

2007-02-20

2007-02-20

Jeanglaude, Jean Bruner (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S144000, C341S141000

Reexamination Certificate

active

11378543

ABSTRACT:
A multi-path digital power supply controller includes a first ADC (ADC1) coupled to the supply's output voltage Voutand arranged to provide an output which varies with Vout's low frequency components, and a second ADC (ADC2) coupled to Voutand arranged to provide an output which varies with Vout's high frequency components. A digital reference value is subtracted from the output of ADC1 to produce a low frequency digital error signal, and a summing circuit sums the low frequency digital error signal and the output of ADC2. Processing circuitry is arranged to produce an output which varies with the summed signal and is suitable for coupling to a power stage for use in regulating Vout. Preferably, ADC1 is a low-bandwidth high-resolution ADC and ADC2 is a high-bandwidth low-resolution ADC, both of which are low-cost components.

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“Digital Power Controller”, Si8250/1/2; Silicon Laboratories, Mar. 2006, pp. 1-30.

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