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US 8,710,877 B2Granted
Adaptive non-positive inductor current detector (ANPICD)
AssigneeAdaptive Digital Power, Inc.
InventorsDonald Wile, Andrew Wu
Life of this patent
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Abstract
Systems and methods are disclosed to detect current for an output load with an inductor. The system includes a high side power transistor a low side power transistor coupled to the high side power transistor; and a controller coupled to the high and low side power transistors.
Claims20
An adaptive current detector for an output inductor from a switched voltage output of a switching regulator, comprising
- a. a high side power transistor;
- b. a low side power transistor;
- c. an inductor coupled to the high and low side power transistors;
- and
- d. a detector asserting a first signal indicating when the high and low side power transistors are off and an inductor current is non-positive and used in an adaptive loop to adjust when the low side transistor is turned off.
2 more elements
A current detector for an output inductor, comprising
- a. a high side power field effect transistor (FET);
- b. a low side FET coupled to the high side FET;
- c. means for asserting a first signal indicating when the high and low side power transistors are off and an inductor current is non-positive;
- and
- d. an adaptive loop to adjust when the low side transistor is turned off.
2 more elements
An adaptive current detector for an output inductor from a switched voltage output of a switching regulator, comprising
- a. a high side power transistor;
- b. a low side power transistor;
- c. an inductor coupled to the high and low side power transistors;
- d. a detector asserting a first signal indicating when the high and low side power transistors are off and an inductor current is non-positive;
- and
- e. a controller coupled to the detector and the high and low side power transistors to turn off the low side power transistor when the first signal is asserted within a predetermined period when the low side power transistor turns off.
3 more elements
Dependencies are inferred from the claim text.