Texas Instruments DRV3256-Q1 Automotive Gate Driver Unit (GDU)

Texas Instruments DRV3256-Q1 Automotive Gate Driver Unit (GDU) is a highly-integrated three-phase gate driver for 48V automotive motor drive applications. These are designed to support high-power motor drive applications by providing a 2A peak source and 2.5A peak sink gate drive currents and 90V MOSFET transient overvoltage support. A highly efficient bootstrap architecture minimizes power losses and the gate drivers' self-heating. A charge pump allows the gate drivers to support 100% PWM duty cycle control.

A wide range of monitoring, diagnostics, and protection features in the Texas Instruments DRV3256-Q1 support a robust motor drive system design. The highly configurable Active Short Circuit (ASC) function enables selected external MOSFETs to be integrated to respond quickly to system faults. The feature eliminates the need for external components. Three or a single low-side current shunt amplifier is optionally provided to support resistor-based low-side current sensing.

Features

AEC-Q100 qualified for automotive applications
- –40°C to +150°C device ambient temperature grade 0
- Device HBM ESD classification level 2
- Device CDM ESD classification level C4B
Functional Safety-Compliant targeted
- Developed for functional safety applications
- Documentation to aid ISO 26262 system design will be available upon production release
- Systematic capability up to ASIL D targeted
Three N-Channel half-bridge gate driver
- 2A/2.5A max peak gate drive current
- Power architecture optimized for 48V applications
- 12V/48V split supply architecture
- 95V transient absolute maximum rating of DC link power supply (DHCP)
- 105V Bootstrap voltage to support 90V MOSFET operating voltage range
- Bootstrap with charge pump for 100% duty cycle
Integrated 1x (DRV3256A-Q1) or 3x (DRV3256-Q1) current shunt amplifiers

Integrated configurable Active Short Circuit (ASC) function
- Low-side (DRV3256A-Q1) or Low-side and High-side (DRV3256-Q1/DRV3256B-Q1) ASC support
- Low-side and High-side ASC support
- Device pin control is available
- Fault handling capability
Serial peripheral interface (SPI) with CRC
Supports 3.3V and 5V logic inputs
Advanced protection features
- Battery voltage monitors
- MOSFET VDS overcurrent monitors
- R_shunt overcurrent monitors
- MOSFET V_GS gate fault monitors
- Analog-built in self-test
- Internal regulator and clock monitors
- Device thermal warning and shutdown
- Fault condition indicator pins

Applications

Automotive 48V mild hybrid motor drives
- Belt and integrated starter generators, and Motor generators
- Electrical Power Steering
- eTurbos and eBoosters
- HVAC compressors and fans
- Transmission control and actuation
- Oil, transmission, and water pumps