1 DRV8329 Key Features

The DRV8329 is a bootstrap-based 3-phase Brushless-DC motor gate driver rated for 4.5V to 60V, and it is capable of driving 3 high-side and 3 low-side MOSFETs with up to 1-A peak source gate current and 2-A peak sink gate current. It uses a bootstrap-based architecture, which means 3 external bootstrap capacitors provide the voltage for the high-side gate driver outputs. In order to support up to 100% duty cycle, the DRV8329 includes a trickle charge pump in order to keep in the high-side MOSFETs fully on and deliver maximum motor current supported by the MOSFETs.

Furthermore, it uses a hardware interface for configuration and integrates a variety of features such as adjustable driver dead time and overcurrent threshold, an independent DRVOFF gate driver shutoff pin, current sense amplifier with low input offset and adjustable gain, a 3.3V 80-mA capable LDO, a 65-V tolerant sleep mode pin with <1uA sleep mode current, and multiple other protection features.

Available in a 36-pin, compact, 5x4mm QFN package, the DRV8329 is ideal for 2S to 10S power tool platforms with an absolute maximum rating of 65-V. This app brief showcases how the DRV8329 meets the most critical power tool requirements: performance, robustness, and scalability.