65-V max 3-phase smart gate driver with buck regulator

The DRV832x family of devices is an integrated

gate driver for three-phase applications. The devices provide three half-bridge gate

drivers, each capable of driving high-side and low-side N-channel power MOSFETs. The

DRV832x generates the correct gate drive voltages using an integrated charge pump

for the high-side MOSFETs and a linear regulator for the low-side MOSFETs. The Smart

Gate Drive architecture supports peak gate drive currents up to 1A source and 2A.

The DRV832x can operate from a single power supply and supports a wide input supply

range of 6 to 60 V for the gate driver and 4 to 60 V for the optional buck

regulator.

The 6x, 3x, 1x, and independent input PWM modes

allow for simple interfacing to controller circuits. The configuration settings for

the gate driver and device are highly configurable through the SPI or hardware (H/W)

interface. The DRV8323 and DRV8323R devices integrate three low-side current sense

amplifiers that allow bidirectional current sensing on all three phases of the drive

stage. The DRV8320R and DRV8323R devices integrate a 600mA DC/DC buck regulator.

A low-power sleep mode is provided to achieve low quiescent current draw by shutting down most of the internal circuitry. Internal protection functions are provided for undervoltage lockout, charge pump fault, MOSFET overcurrent, MOSFET short circuit, gate driver fault, and overtemperature. Fault conditions are indicated on the nFAULT pin with details through the device registers for SPI device variants.