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US 9,071,138 B2Granted
Adaptive digital pulse width modulation generator for buck converters
AssigneeAdaptive Digital Power, Inc.
InventorsHuy X. Ngo, Donald Wile
Life of this patent
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Abstract
Systems and methods are disclosed to control a buck converter by performing adaptive digital pulse width modulation (ADPWM) with a plurality of upper power transistors each uniquely controlled to enable greater than 100% duty cycle for the buck converter and a lower power transistor coupled to the plurality of upper power transistors; and driving an inductor having one end coupled to the lower power transistor and the upper power transistors.
Claims18
An adaptive digital pulse width modulation (ADPWM) generator for a buck converter, comprising:
- a. first and second upper power transistors each uniquely controlled to enable greater than 100% duty cycle for the buck converter;
- b. a lower power transistor coupled to the plurality of upper power transistors;
- c. an inductor having one end coupled to the lower power transistor and the upper power transistors;
- and
- d. a load coupled to the inductor,
- e. wherein the first upper power transistor is coupled to a first voltage and wherein the second upper power transistor is coupled to a second voltage and the first voltage is prevented from sourcing current to the second voltage.
3 more elements
A method to control a buck converter, comprising:
- a. performing adaptive digital pulse width modulation (ADPWM) with a plurality of upper power transistors each uniquely controlled to enable greater than 100% duty cycle for the buck converter and a lower power transistor coupled to the plurality of upper power transistors;
- b. charging an inductor through one end coupled to the lower power transistor and the upper power transistors. and
- c. wherein the first upper power transistor is coupled to a first voltage and wherein the second upper power transistor is coupled to a second voltage and the first voltage is prevented from sourcing current to the second voltage.
Dependencies are inferred from the claim text.