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US 11,923,764 B1Granted
Electrostatic discharge circuit for switching mode power supply
AssigneeTexas Instruments Incorporated
InventorLiang Zhang
Life of this patent
Estimating the term…
Abstract
In one example, a circuit comprises: a controller, an electrostatic discharge (ESD) circuit, and a driver circuit. The controller has a driver control output. The ESD circuit has a driver control input and an ESD output, the driver control input coupled to the driver control output. The driver circuit has a driver input and a driver output, the driver input coupled to the ESD output.
Claims18
A circuit comprising:
- a controller having a driver control output
- an electrostatic discharge (ESD) circuit having an ESD input, a driver control input, a first ESD output, a second ESD output, and a driver power input, wherein the driver control input is coupled to the driver control output;
- a driver circuit having a first driver input, a second driver input, a driver output, a first voltage terminal, a second voltage terminal, a pull-up circuit coupled between the first voltage terminal and the driver output, a pull-down circuit coupled between the driver output and the second voltage terminal, wherein the first driver input is coupled to the first ESD output, the second driver input is coupled to the second ESD output, a pull-up control terminal of the pull-up circuit is coupled to the first driver input, and a pull-down control terminal of the pull-down circuit is coupled to the second driver input;
- the ESD circuit is configured to provide a pull-down control signal at the second ESD output responsive to a state of the driver power input;
- and
- the pull-down circuit is configured to disconnect the driver output from the second voltage terminal responsive to the pull-down control signal.
3 more elements
An integrated circuit comprising:
- a controller having a first driver control output and a second driver control output;
- a first ESD circuit having a first driver control input and a first ESD output, the first driver control input coupled to the first driver control output;
- a second ESD circuit having a second driver control input and a second ESD output, the second driver control input coupled to the second driver control output;
- a voltage regulator having a regulator output;
- a first driver circuit coupled between an internal supply voltage terminal and a switching terminal and having a first driver input and a first driver output, the first driver input coupled to the first ESD output;
- a second driver circuit coupled between the regulator output and a rectifier terminal and having a second driver input and a second driver output, the second driver input coupled to the second ESD output;
- a first transistor coupled between an input voltage terminal and the switching terminal and having a first control terminal coupled to the first driver output;
- and
- a second transistor coupled between the switching terminal and the rectifier terminal and having a second control terminal coupled to the second driver output.
6 more elements
Dependencies are inferred from the claim text.