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US 12,726,103 B2Granted
Power switch deactivation driver
AssigneeTexas Instruments Incorporated
InventorConnie Jiang
Life of this patent
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Abstract
One example includes a power supply system. The system includes a power switch configured to activate via a control voltage responsive to a first state of an activation signal to conduct current from a power rail to a switching terminal. The system further includes a power switch deactivation driver configured to control an amplitude of the control voltage responsive to a second state of the activation signal based on a voltage difference between the power rail and the switching terminal to provide for a variable rate of deactivation of the power switch.
Claims20
A system comprising:
- a switch coupled between a power rail and a switching terminal, the switch having a control terminal;
- and
- a driver circuit having an input and an output, the output coupled to the control terminal of the switch,
- wherein the driver circuit is capable of, responsive to receiving a signal indicating activation or deactivation of the switch at the input, providing a control signal at the control terminal of the switch to control deactivation of conduction of a current from the power rail to the switching terminal at a variable rate.
1 more element
A circuit comprising:
- a sense resistor coupled to a power rail and capable of conducting a sense current, wherein the sense current has an amplitude based on a voltage difference between the power rail and a switching terminal responsive to a state of an activation signal;
- and
- a shutoff switch capable of controlling an amplitude of a control voltage, wherein the control voltage is capable of controlling an activation of a power switch, the shutoff switch being controlled by the amplitude of the sense current to control the amplitude of the control voltage and to provide a variable rate of deactivation of the power switch.
Dependencies are inferred from the claim text.