Feedback based buck timing of a direct current (DC)-DC converter
First Claim
1. Switching power supply circuitry adapted to provide a first buck output signal and comprising:
- at least a first shunt switching element coupled between a ground and an output inductance node; and
switching control circuitry adapted to select one of an ON state and an OFF state of the first shunt switching element such that the switching control circuitry is inhibited from selecting the ON state of the first shunt switching element when the buck output signal is above a first threshold.
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Accused Products
Abstract
At least a first shunt switching element and switching control circuitry of a first switching power supply are disclosed. At least the first shunt switching element is coupled between a ground and an output inductance node of the first switching power supply. The first switching power supply provides a buck output signal from the output inductance node. The switching control circuitry selects one of an ON state and an OFF state of the first shunt switching element. When the buck output signal is above a first threshold, the switching control circuitry is inhibited from selecting the ON state. The first switching power supply provides a first switching power supply output signal based on the buck output signal. By using feedback based on the buck output signal, the switching control circuitry may refine the timing of switching between series switching elements and shunt switching elements to increase efficiency.
270 Citations
22 Claims
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1. Switching power supply circuitry adapted to provide a first buck output signal and comprising:
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at least a first shunt switching element coupled between a ground and an output inductance node; and switching control circuitry adapted to select one of an ON state and an OFF state of the first shunt switching element such that the switching control circuitry is inhibited from selecting the ON state of the first shunt switching element when the buck output signal is above a first threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method comprising:
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providing at least a first shunt switching element of a first switching power supply, such that at least the first shunt switching element is coupled between a ground and an output inductance node; providing switching control circuitry of the first switching power supply; providing a buck output signal from the output inductance node; selecting one of an ON state and an OFF state of the first shunt switching element; when the buck output signal is above a first threshold, inhibiting selecting the ON state of the first shunt switching element; and providing a first switching power supply output signal based on the buck output signal.
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Specification