Gate driver IC for three-phase motor-drive applications

26-05-2020 | Texas Instruments | Automotive & Transport

The Texas Instruments DRV8305-Q1 device is a gate driver IC for three-phase motor-drive applications. The device offers three high-accuracy half-bridge drivers, each able to drive a high-side and low-side N-channel MOSFET. A charge pump driver sustains 100% duty cycle and low-voltage operation for cold crank situations. The driver IC can tolerate load dump voltages up to 45V.

The device incorporates three bidirectional current-shunt amplifiers for accurate low-side current measurements that support variable gain settings and an adjustable offset reference.

The device includes an integrated voltage regulator to support an MCU or other system power demands. The voltage regulator can be interfaced directly with a LIN physical interface to enable low-system standby and sleep currents.

The gate driver utilises automatic handshaking when switching to stop current shoot through. The VDS of both the high-side and low-side MOSFETs is accurately sensed to guard the external MOSFETs against overcurrent conditions. The SPI gives detailed fault reporting, diagnostics, and device configurations including gain options for the current shunt amplifier, individual MOSFET overcurrent detection, and gate-drive slew-rate control.

By Natasha Shek