DRV8350/53 Three-Phase Smart Gate Drivers

Texas Instruments' DRV8350 and DRV8353 are 100 V three-phase smart gate drivers with various pulse width modulation (PWM) control modes

Image of Texas Instruments' DRV8350 Three-Phase Smart Gate Driver Texas Instruments' DRV835x devices are highly-integrated gate drivers for three-phase brushless DC (BLDC) motor applications. These applications include field-oriented control (FOC), sinusoidal current control, and trapezoidal current control of BLDC motors. 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 DRV835x 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, provides flexibility in decreasing electromagnetic interference (EMI) by MOSFET slew rate control, and protects against gate short circuit conditions through VGS monitors. A strong gate pulldown circuit helps prevent unwanted dv/dt parasitic gate turn on events.

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

Features

9 V to 100 V, triple half-bridge gate driver

Optional integrated buck regulator
Optional triple low-side current shunt amplifiers

Smart gate drive architecture:

Adjustable slew rate control for EMI performance
VGS handshake and min. dead-time insertion to prevent shoot-through
50 mA to 1 A peak source current
100 mA 2 A peak sink current
dv/dt mitigation through 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 V to 95 V operating voltage range
2.5 V to 75 V, 350 mA output capability

Integrated triple current shunt amplifiers:

Adjustable gain: 5 V/V, 10 V/V, 15 V/V, and 40 V/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: 20 µA at VVM = 48 V
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

Three-phase BLDC motor modules
Fans, blowers, and pumps
E-bikes, e-scooters, and e-mobility

Power and garden tools and lawn mowers
Drones, robotics, and RC toys
Factory automation and textile machines

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