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Texas Instruments DRV835xF Three-Phase Smart Gate Driver

Texas Instruments DRV835xF Three-Phase Smart Gate Driver are highly-integrated gate drivers for three-phase brushless DC (BLDC) motor applications. The device variants provide optional integrated current shunt amplifiers to support different motor control schemes and a buck regulator to power the gate driver or external controller.

The Texas Instruments DRV835xF uses smart gate drive (SGD) architecture to decrease the number of external components that are typically necessary for MOSFET slew rate control and protection circuits. The SGD architecture also optimizes dead time to prevent shoot-through conditions and provides flexibility in decreasing electromagnetic interference (EMI) by MOSFET slew rate control. It also protects against gate short circuit conditions through VGS monitors. A strong gate pulldown circuit helps prevent unwanted dV/dt parasitic gate turn on events.

Various PWM control modes (6x, 3x, 1x, and independent) are supported for simple interfacing to the external controller. These modes can decrease the number of outputs required of the controller for the motor driver PWM control signals. This family of devices also includes 1x PWM mode for simple sensored trapezoidal control of a BLDC motor by using an internal block commutation table.

Features

9 to 100V, Triple half-bridge gate driver
- Optional integrated buck regulator
- Optional triple low-side current shunt amplifiers
Functional Safety Quality-Managed
- Documentation available to aid IEC 61800-5-2 functional safety system design
Smart gate drive architecture
- Adjustable slew rate control for EMI performance
- VGS handshake and minimum dead-time insertion to prevent shoot-through
- 50mA to 1A peak source current
- 100mA to 2A peak sink current
- dV/dt mitigation through a strong pulldown
Integrated gate driver power supplies
- High-side doubler charge pump for 100% PWM duty cycle control
- Low-side linear regulator
Integrated LM5008A buck regulator
- 6 to 95V operating voltage range
- 2.5 to 75V, 350mA output capability

Integrated triple current shunt amplifiers
- Adjustable gain (5, 10, 20, 40V/V)
- Bidirectional or unidirectional support
6x, 3x, 1x, and independent PWM modes
- Supports 120° sensored operation
SPI or hardware interface available
Low-power sleep mode (20µA at VVM = 48V)
Integrated protection features
- VM undervoltage lockout (UVLO)
- Gate drive supply undervoltage (GDUV)
- MOSFET VDS overcurrent protection (OCP)
- MOSFET shoot-through prevention
- Gate driver fault (GDF)
- Thermal warning and shutdown (OTW/OTSD)
- Fault condition indicator (nFAULT)

Applications

3-phase brushless-DC (BLDC) motor modules
Servo drives, factory automation
Linear motor transport systems

Industrial collaborative robot
Autonomous guided vehicle, delivery drones
E-Bikes, E-scooters, and E-mobility

Texas Instruments DRV835xF Three-Phase Smart Gate Driver

Features

Applications

Simplified Schematic

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