1 Features

• Three-phase PWM motor driver with integrated

650V enhancement mode GaNFETs

• Up to 450V operating voltage

– 650V absolute maximum voltage

• High output current capability: 5A Peak current

• Low conduction loss: Low on-state resistance per

GaN FET: 205mΩ RDS(ON) at TA = 25°C

• Low switching loss: Zero reverse recovery, low

output capacitance, slew rate control

• Low distortion: Ultra low propagation delay <

135ns, Ultra low adaptive dead time < 200ns

• Integrated gate drives with slew rate control of

phase node voltage

– Slew rate options from 5V/ns to 40V/ns

• 500ns minimum low side on time support with

integrated fast bootstrap GaN rectifier

• Low-side GaN FET open source pins to support 1-

or 2- or 3-shunt current sensing

• Supports up to 60kHz hard switching

• Integrates a 11MHz, 15V/μs amplifier for single

shunt current sensing

• Supports 3.3V and 5V logic inputs

• Integrated BRAKE functionality to turn on all low

side GaN FETs together

• Integrated temperature sensor

• >1.6mm clearance between OUTx and OUTx, VM

and OUTx and OUTx and PGND.

• 2mm clearance between VM and PGND

• Integrated protection features

– GVDD and bootstrap under voltage lockout

– Over current protection for each GaN FET

– Over temperature protection

– PWM input dead time

– Current limit protection using integrated

comparators for all three phases

– Fault condition indication pin (HV_nFAULT)

2 Applications

• Refrigerator & freezer

• Appliances and HVAC pumps and fans

• Dishwasher

• Small home appliances

• Residential air conditioners

• Cooker hood

• Brushless-DC motor modules

3 Description

The DRV7308 is a three-phase intelligent power

module (IPM) that consists of 205mΩ, 650V e-mode

Gallium-Nitride (GaN) for driving three-phase BLDC/

PMSM motors up to 450V DC rails. The applications

include field-oriented control (FOC), sinusoidal current

control, and trapezoidal (six step) current control of

BLDC motors. The device helps to achieve more

than 99% efficiency for a 3-phase modulated, FOCdriven,

250W motor drive application in a QFN 12mm

x 12mm package at 20kHz switching frequency,

eliminating the need for heat sink. The device helps

to achieve ultra quiet operation, with very low dead

time. The integrated bootstrap rectifier with bootstrap

current limit, eliminates the need for an external

bootstrap diode.