Texas Instruments DRV8311 3-Phase Brushless-DC Motor Driver

Texas Instruments DRV8311 3-Phase Brushless-DC Motor Driver provides three integrated MOSFET half-H-bridges for driving a three-phase brushless DC (BLDC) motor for 5V, 9V, 12V, or 18V DC rails or 1S to 4S battery-powered applications. The device integrates three current-sense amplifiers (CSA) with an integrated current-sense for sensing the three-phase currents of BLDC motors to achieve optimum FOC and current-control system implementation.

The Texas Instruments DRV8311P can generate and configure PWM timers over Texas Instruments SPI (tSPI) and allows the control of multiple BLDC motors directly over the tSPI interface. This feature reduces the required I/O ports from the primary controller to control multiple motors.

Features

Three-phase PWM motor driver
- 3-phase brushless DC motors
3V to 20V operating voltage
- 24V absolute maximum voltage
High output current capability
- 5A peak current drive
Low on-state resistance MOSFETs
- 210mΩ typ. R_DS(ON) (HS + LS) at T_A = 25°C
Low power sleep mode
- 1.5µA at V_VM = 12V, T_A = 25°C
Multiple control interface options
- 6x PWM control interface
- 3x PWM control interface
- PWM generation mode (SPI/tSPI) with optional calibration between MCU and DRV8311
tSPI interface (DRV8311P)
- PWM duty and frequency update over SPI
- Control multiple DRV8311P devices using a standard 4-wire SPI interface

Supports up to 200kHz PWM frequency
Integrated current sensing
- No external resistor required
- Sense amplifier output, one per 1/2-bridge
SPI and hardware device variants
- 10MHz SPI communication (SPI/tSPI)
Supports 1.8V, 3.3V, and 5V logic inputs
Built-in 3.3V ± 4.5%, 100mA LDO regulator
Integrated protection features
- VM undervoltage lockout (UVLO)
- Charge pump undervoltage (CPUV)
- Overcurrent protection (OCP)
- Thermal warning and shutdown (OTW/OTSD)
- Fault condition indication pin (nFAULT)