The DRV8308RHAT is a 3-phase BLDC Motor Pre-driver with integrated speed control and commutation logic. It drives the gates of 6 external N-channel MOSFETs with a configurable current of 10mA to 130mA for optimal switching characteristics. The 3 motor phases are commutated according to the Hall sensor inputs. Once the motor reaches a consistent speed, the DRV8308 uses just 1 Hall sensor to minimize jitter caused by sensor mismatch. The Hall signal-to-drive timing can be advanced or delayed in 0.1% increments to optimize power efficiency. An optional 180° commutation mode drives sinusoidal current through the motor and minimizes audible noise and torque ripple. Peak motor current can be controlled by sizing a sense resistor. The driver achieves closed-loop speed control to spin motors to a precise RPM across a wide range of load torques. The system matches motor speed generated from an FG trace or the Hall sensors to the reference frequency on pin CLKIN.
Integrated commutation from hall sensors
Timing can be advanced/delayed
Single input controls motor speed
Flexible configuration methods
Read internal non-volatile memory
Read external EEPROM
Write SPI
Configurable motor current limiter
Low-power standby mode
Locked rotor detection and restart
Integrated over-current, overvoltage and over-temperature protection
(EN)
