DRV8329 3-Phase BLDC Gate Driver

Texas Instruments' DRV8329 is an integrated gate driver that provides three half-bridge drivers and is designed for three-phase applications. Each half-bridge driver can drive high-side and low-side N-channel power MOSFETs (NMOS). The driver generates the correct gate drive voltages using an internal charge pump and enhances the high-side MOSFETs using a bootstrap circuit. A trickle charge pump is included to support a 100% duty cycle. The device architecture supports peak gate drive currents up to 1 A source and 2 A sink. The DRV8329 can operate from a single power supply and supports a wide input supply range of 4.5 V to 60 V. The 6x and 3x PWM modes allow for simple interfacing to controller circuits.

The DRV8329 has an integrated accurate 3.3 V LDO that powers the external controller and can be a reference for CSA. The device has configurable settings through the hardware (H/W) pins. The driver integrates a low-side current sense amp that allows current sensing for the sum of the current from each phase of the drive stage. A low-power sleep mode is provided to achieve low quiescent current by shutting down most of the internal circuitry. The internal protection functions include undervoltage lockout, GVDD fault, MOSFET overcurrent, MOSFET short circuit, and overtemperature. The fault conditions are indicated on the nFAULT pin.