Description:

The DRV8343-Q1 device is an integrated gate driver for three-phase applications. This device features three half-bridge gate drivers, each capable of driving high-side and low-side N-channel power MOSFETs. Dedicated source and drain pins support independent MOSFET control for solenoid applications. The DRV8343-Q1 uses an integrated charge pump to generate sufficient gate drive voltage for the high-side MOSFETs, and a linear regulator to generate sufficient gate drive voltage for the low-side MOSFETs. This smart gate drive architecture supports up to 1A peak gate drive source current and 2A peak gate drive sink current. The DRV8343-Q1 can be powered from a single supply and supports a wide input supply voltage range of 5.5 to 60V for gate drivers. 6x, 3x, 1x, and independent input PWM modes simplify connection to controller circuits. The gate driver and device configuration settings are highly configurable and can be implemented through SPI or hardware (H/W) interfaces. The DRV8343-Q1 device integrates three low-side current sense amplifiers for bidirectional current sensing on all three phases of the drive stage. A low-power sleep mode is provided to achieve low quiescent current consumption. Internal protection features are provided for undervoltage lockout, charge pump fault, MOSFET overcurrent, MOSFET short circuit, phase node short to supply and ground, gate driver fault, and overtemperature conditions. Fault conditions and fault details can be indicated on the nFAULT pin through the device registers of SPI device models.

Features:

• AEC-Q100 qualified for automotive applications – Temperature grade 1: -40°C ≤ TA ≤ 125°C

• 3 independent half-bridge gate drivers

– Dedicated source (SHx) and drain (DLx) pins support independent MOSFET control

– Capable of driving 3 high-side and 3 low-side N-channel MOSFETs (NMOS)

• Smart gate drive architecture

– Adjustable slew rate control

– 1.5mA to 1A peak source current

– 3mA to 2A peak sink current

• Gate driver charge pump supporting 100% duty cycle

• 3 integrated current sense amplifiers (CSA)

– Adjustable gain (5, 10, 20, 40 V/V)

– Bidirectional or unidirectional support

• Available with SPI (S) and hardware (H) interfaces

• 6x, 3x, 1x, and independent PWM modes

• Supports 3.3V and 5V logic inputs

• Charge pump output capable of driving reverse power protection MOSFET

• 3.3V, 30mA linear regulator

• Integrated protection features

– VM undervoltage lockout (UVLO)

– Charge pump undervoltage (CPUV)

– Short to battery (SHT_BAT)

– Short to ground (SHT_GND)

– MOSFET overcurrent protection (OCP)

– Gate driver fault (GDF)

– Thermal warning and thermal shutdown (OTW/OTSD)

– Fault status indicator (nFAULT)

Applications:

• 12V and 24V automotive motor control applications

– BLDC and BDC motor modules

– Fans and blowers

– Fuel pumps and water pumps

– Solenoid drivers