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US 2020/0287534 A1Published application
Power transistor gate-charge harvester for internal supply generation
AssigneeTexas Instruments Incorporated
InventorsStefan Dietrich, Josy Bernard, Christian Harder
Life of this patent
Estimating the term…
Abstract
A gate-charge harvester includes a harvest capacitor that has a first plate and a second plate. The second plate is coupled to a lower rail and the first plate is coupled to send a voltage towards a regulator. The gate-charge harvester also includes a low-side harvest transistor having a first terminal coupled to a gate of a low-side power transistor and a second terminal coupled to the first plate.
Claims17
1-17. (canceled)
A DC/DC boost converter circuit comprising:
- a ground plane pin, a switch node pin adapted to be coupled to a voltage source through an inductor, and an output pin coupled to the switch node pin and adapted to be coupled to a first load;
- a power transistor having a drain and a source coupled in series between the ground plane pin and the switch node pin and having a gate;
- gate driver circuitry having an output coupled to the gate of the power transistor;
- a harvest capacitor having a first plate coupled to a harvested voltage output and having a second plate coupled to the ground plane;
- a harvest transistor having a first terminal coupled to the gate of the power transistor and having a second terminal coupled to the first plate;
- and
- a harvest regulator having an input coupled to the harvested voltage output and having a second load output coupled to a second load separate from the first load.
4 more elements
19-28. (canceled)
Dependencies are inferred from the claim text.