DRV8317 3-Phase PWM Motor Driver

15 April, 2023

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Texas Instruments’ integrated MOSFET driver is suitable for driving 3-phase motors

Texas Instruments’ DRV8317 3-phase PWM motor driver provides three integrated MOSFET half-bridges for driving 3-phase brushless DC (BLDC) motors with 5 V, 9 V, 12 V, or 18 V DC rails or 2s to 4s batteries. The driver provides integrated 3-phase current sensing, eliminating the need for external sense resistors. The DRV8317 has an integrated LDO that provides a regulated 3.3 V rail that can deliver up to 80 mA for external loads such as microcontrollers (MCUs), logic circuits, hall sensors, and more. The configurable 6x or 3x PWM-control scheme can implement a sensored or sensorless field-oriented control (FOC), sinusoidal control, or trapezoidal control using an external MCU.

The DRV8317 can drive a PWM frequency of up to 200 kHz and is highly configurable through the SPI (DRV8317S) or pins (DRV8317H). The configurable features include PWM mode, slew rate, current-sense gain, and more. The integrated protection features include supply undervoltage lockout (UVLO), overvoltage protection (OVP), charge-pump undervoltage (CPUV), overcurrent protection (OCP), overtemperature warning (OTW), overtemperature shutdown (OTS), and protects the device, motor, and the system against fault events which are indicated by the nFAULT pin.

Features

3-phase BLDC motor driver:
- Configurable slew rate for EMI mitigation
- Programmable gain current sensing
- Supported PWM frequency: up to 200 kHz
- Integrated shoot-through protection
Operating voltage range: 4.5 V to 20 V (24 V abs. max.)
High output current capability: 5 A peak-current drive
Low on-state resistance MOSFETs: R_DS(ON) (HS + LS) at T_A = +25°C : 130 mΩ (typ.)
Ultra-low Q-current sleep mode: 3 µA (max.) at V_VM = 12 V, T_A = +25°C
Built-in 3.3 V ±4.5%, 80 mA LDO regulator
Multiple control interface options: 6x PWM and 3x PWM
Integrated current sensing:
- No external current-sense resistor is required
- 3-phase current sense outputs
SPI and hardware device variants:
- 10 MHz SPI interface variant for flexibility
- Pin-configurable variant for simplicity
Supported logic inputs: 1.8 V, 3.3 V, and 5 V
Integrated protection features:
- VM UVLO, VM OVP, CPUV, OCP, and OTW/OTS
- Fault-condition indication pin (nFAULT)