Low power control mode for power supply
AssigneeTexas Instruments Incorporated
InventorsByron Reed, Kevin Ovens
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Abstract
Systems and methods are disclosed to mitigate power consumption in a power supply, such as when operating in a low power mode. One aspect of the present invention relates to a control system for a power supply. The system includes a bias generator that provides a bias signal operative to charge a storage device based on a control signal. During a low power mode, a control system provides the control signal with a predetermined duty cycle that is functionally related to a storage capacity of the storage device.
Claims23
A control system for a power supply, comprising:
- a bias generator that provides a bias signal operative to charge a storage device based on a control signal;
- and
- a control system that, during a low power mode, provides the control signal with a predetermined duty cycle that is functionally related to a storage capacity of the storage device.
A power supply system, comprising:
- a converter comprising:
- a high-side switch;
- a low-side switch;
- an inductor coupled to a first node between the high-side switch and the low-side switch and an output node;
- and
- an output capacitor coupled to provide an output voltage across an associated load, and
- a bias generator that provides a bias signal at an output that is employed for modulating the at least one high-side switch according to an operating mode of the system;
- and
- a storage device coupled to the output of the bias generator, the bias generator being activated during a low power mode to charge the storage device intermittently based on a storage capacity of the storage device.
A power supply control system, comprising:
- means for generating a bias signal during a low power mode;
- and
- means for, during the low power mode, controlling the means for generating to charge an associated storage device intermittently at a frequency that depends on a storage capacity of the storage device.
A method for controlling a power supply system in a low power mode, comprising:
- deactivating a reference generator that is coupled to charge a storage device;
- intermittently strobing the reference generator to re-charge the storage device according to a storage capacity of the storage device.
Dependencies are inferred from the claim text.