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1 Features

? Three phase half-bridge gate driver

– Drives six N-channel MOSFETs (NMOS)

– 4.5 to 60-V wide operating voltage range

– Bootstrap architecture for high-side gate driver

– Strong GVDD charge pump to support up to

50mA average gate switching current enables

driving 400nC MOSFETs at 20kHz

– Trickle charge pump to support 100 PWM

duty cycle and to generate overdrive supply

to drive external cut-off or reverse polarity

protection circuit

? Smart Gate Drive architecture

– 45-level configurable peak gate drive current up

to 1000 / 2000-mA (source / sink)

– Three-step drive current configuration to

optimize charge/discharge cycle and minimize

deadtime

– Closed-loop automatic deadtime insertion

based on gate-source voltage monitoring

– Configurable soft shutdown to minimize

inductive voltage spikes during overcurrent

shutdown

? Low-side Current Sense Amplifier

– Sub-1 mV low input offset across temperature

– 9-level adjustable gain

? SPI-based detailed configuration and diagnostics

? DRVOFF pin to disable driver independently

? High voltage wake up pin (nSLEEP)

? 6x, 3x, 1x, and Independent PWM Modes

? Supports 3.3-V, and 5-V Logic Inputs

? Integrated protection features

– Battery and power supply voltage monitors

– Phase feedback comparator

– MOSFET VDS and Rsense over current monitors

– MOSFET VGS gate fault monitors

– Device thermal warning and shutdown

– Fault condition indicator pin

2 Applications

? Appliances, Cordless Garden and Power Tools,

Lawnmowers

? Brushless-DC (BLDC) Motor Modules and PMSM

? Fans, Pumps, and Servo Drives

? E-Bikes, E-Scooters, and E-Mobility

? Cordless Vacuum Cleaners

? Drones, Industrial & Logistics Robots, and RC

Toys

3 Description

The DRV8334 is an integrated smart gate driver for

three-phase BLDC applications. The device provides

three half-bridge gate drivers, each capable of driving

high-side and low-side N-channel power MOSFETs.

The DRV8334 generates the correct gate drive

voltages using an integrated bootstrap diode and

a GVDD charge pump. The Smart Gate Drive

architecture supports configurable peak gate drive

current from 0.7-mA up to 1-A source and 2-A sink.

The DRV8334 can operate from a single power

supply with a wide input range of 4.5 to 60-V. A trickle

charge pump allows for the gate drivers to support

100 PWM duty cycle control, and provides overdrive

gate drive voltage of external switches.

The DRV8334 provides low-side current sense

amplifiers to support resistor based low-side current

sensing. The low offset of the amplifiers enables the

system to obtain precise motor current measurement.

A wide range of diagnostics and protection features

integrated in the DRV8334 enable a robust motor

drive system design and help eliminate the needs

of external components. The highly configurable

device response allows the device to be integrated

seamlessly into a variety of system designs.