DRV3245BQPHPRQ1.pdf

3 Description

The DRV3245Q-Q1 device is a FET gate driver IC for

three-phase motor-drive applications designed

according to the applicable requirements of ISO

26262 for functional safety applications. The device

provides three half-bridge drivers each capable of

driving a high-side and low-side N-channel MOSFET

while also providing sophisticated protection and

monitoring of the FETs. A charge-pump driver

enables 100% duty cycle and supports low battery

voltages during cold-crank operation. The integration

of current-sense amplifiers, integrated phase

comparators, and SPI-based configuration of the

driver and its peripherals enable reduction of the bill

of materials (BOM) and space on the printed circuit

board (PCB) because of the elimination of most

external and passive components.

The DRV3245Q-Q1 device also integrates

diagnostics and protection for each internal block and

provides support for common system diagnostic

checks each of which can be instantiated and

reported through SPI. This flexibility of the integrated

features allows the device to integrate seamlessly

into a variety of safety architectures.

1 Features

1• AEC-Q100 qualified for automotive applications:

– Device temperature grade 1:

–40°C to +125°C, TA

• SafeTI™semiconductor component

– Developed according to the applicable

requirements of ISO 26262

• 4.5-V to 45-V operating voltage

• Programmable peak gate drive currents up to 1A

• Charge-pump gate driver for 100% Duty Cycle

• Current-shunt amplifiers and phase comparators

– A / C Device: 3 current-shunt amplifiers(1) and

3-phase comparators with status through SPI

(1) C device : Low-drift offset high-precision amplifiers

– B Device: 2 current-shunt amplifiers and 3-

phase comparators with real-time monitor

through digital pins

• 3-PWM or 6-PWM input control up to 20 kHz

• Single PWM-mode commutation capability

• Supports both 3.3-V and 5-V digital interface

• Serial peripheral interface (SPI)

• Thermally-enhanced 48-Pin HTQFP

• Protection features:

– Internal regulators, battery voltage monitor

– SPI CRC

– Clock monitor

– Analog built-in self test

– Programmable dead-time control

– MOSFET shoot-through prevention

– MOSFET VDS overcurrent monitors

– Gate-source voltage real time monitor

– Overtemperature warning and Shutdown

2 Applications

• 12-V automotive motor-control applications

– Electrical power steering (EPS, EHPS)

– Electrical brake and brake assist

– Transmissions and pumps