Texas Instruments Corporation

Tagore Technology, Inc.

Prajit Nandi

Vasishta Kidambi

Naga Venkata Prasadu Mangina

In some examples, a controller circuit comprises: a voltage subtractor circuit having a subtractor output and first and second subtractor inputs, the first subtractor input adapted to be coupled to a first current terminal of a transistor, and the second subtractor input adapted to be coupled to a second current terminal of the transistor; an internal voltage generator circuit having a generator input and a generator output, the generator input adapted to be coupled to the first current terminal; and a gate control circuit having a gate control input and a gate control output, the gate control input coupled to the subtractor output, the gate control output adapted to be coupled to a gate of the transistor, the gate control circuit including a switch coupled between the gate control output and the generator output.

Rectification by battery protection system

In some examples, a controller circuit comprises: a voltage subtractor circuit having a subtractor output and first and second subtractor inputs, in which the first subtractor input is adapted to be coupled to a first current terminal of a transistor, the second subtractor input is adapted to be coupled to a second current terminal of the transistor; a gate control circuit having a gate control input and a gate control output, the gate control input coupled to the subtractor output, the gate control output adapted to be coupled to a gate of the transistor; and a discharge circuit having a discharge circuit input and a discharge circuit output, the discharge circuit input coupled to the gate control circuit, the discharge circuit output adapted to be coupled to the first current terminal of the transistor.

Handling of battery loss event

An electrical circuit includes a ground-referenced transistor and a non-ground-referenced transistor configured in a half-bridge topology. The non-ground-referenced power transistor has a first conducting electrode coupled to a high voltage power supply, a control electrode coupled to a high-side pre-driver, and a second conducting electrode coupled to a switch node. The electrical circuit further includes a boot-strapped capacitor having a bottom plate coupled to the second conducting electrode and a top plate coupled to the high-side pre-driver, and an interface coupled to a first sense device for sensing a voltage at the top plate, a second sense device for sensing a voltage at the bottom plate, and a charging device for selectively increasing the voltage at the top plate. The interface controls the charging device based on the voltage at the top plate and the voltage at the bottom plate.

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Kolkata, India

Prajit Nandi