Reference voltage control in a power supply
AssigneeInfineon Technologies Austria AG
InventorsPaul Sisson, Keng Chen
Life of this patent
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Abstract
A power supply includes a power converter, a reference voltage generator, and a controller. During operation, the power converter produces an output voltage to power a load. The reference voltage generator (such as a voltage mode amplifier circuit) generates a floor reference voltage, a magnitude of which varies as a function of the output voltage error. The controller compares an output voltage feedback signal (derived from the output voltage) to the floor reference voltage to produce control output to control timing of activating switches in the power converter to maintain the output voltage within a desired voltage range.
Claims34
A power supply comprising:
- a reference voltage generator operable to produce a floor reference voltage;
- phase control circuitry operable to produce an output voltage to power a load as a function of an output voltage feedback signal derived from the output voltage and of the floor reference voltage;
- and
- a mode controller operable to switch the reference voltage generator between a first operational mode in which the floor reference voltage is set to a predetermined fixed voltage value and a second operational mode in which a magnitude of the floor reference voltage varies.
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A method comprising:
- producing a floor reference voltage;
- producing an output voltage of a power supply to power a load as a function of an output voltage feedback signal of the power supply and of the floor reference voltage;
- and
- during generation of the output voltage, switching the power supply between a first operational mode in which the floor reference voltage is set to a predetermined fixed voltage value and a second operational mode in which a magnitude of the floor reference voltage varies.
Computer-readable storage hardware having instructions stored thereon, the instructions, when carried out by computer processor hardware, cause the computer processor hardware to:
- produce a floor reference voltage;
- produce an output voltage of a power supply to power a load as a function of an output voltage feedback signal of the power supply and of the floor reference voltage;
- and
- during generation of the output voltage, switch operation of the power supply between a first operational mode in which the floor reference voltage is set to a predetermined fixed value and a second operational mode in which a magnitude of the floor reference voltage varies.
Dependencies are inferred from the claim text.