DRV8308 Series
42-V max sensored sinusoidal control, 3-phase BLDC gate driver with SPI
Manufacturer: Texas Instruments
Catalog
42-V max sensored sinusoidal control, 3-phase BLDC gate driver with SPI
Key Features
• Three-Phase Brushless DC Motor ControllerDigital Closed-Loop Speed Control with Programmable Gain and FiltersDrives 6 N-Channel MOSFETs With Configurable 10- to 130-mA Gate DriveIntegrated Commutation from Hall SensorsTiming Can Be Advanced/Delayed120° or 180°-Sinusoidal Current ControlSingle Input Controls Motor SpeedOperating Supply Voltage 8.5 to 32 VFlexible Configuration MethodsRead Internal Non-Volatile MemoryRead External EEPROMWrite SPIConfigurable Motor Current Limiter5-V Regulator for Hall SensorsLow-power Standby ModeIntegrated Overcurrent, Overvoltage, and Overtemperature ProtectionThree-Phase Brushless DC Motor ControllerDigital Closed-Loop Speed Control with Programmable Gain and FiltersDrives 6 N-Channel MOSFETs With Configurable 10- to 130-mA Gate DriveIntegrated Commutation from Hall SensorsTiming Can Be Advanced/Delayed120° or 180°-Sinusoidal Current ControlSingle Input Controls Motor SpeedOperating Supply Voltage 8.5 to 32 VFlexible Configuration MethodsRead Internal Non-Volatile MemoryRead External EEPROMWrite SPIConfigurable Motor Current Limiter5-V Regulator for Hall SensorsLow-power Standby ModeIntegrated Overcurrent, Overvoltage, and Overtemperature Protection
Description
AI
The DRV8308 controls sensored brushless DC motors with advanced features and a simple input interface. As a predriver, 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 DRV8308 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. The DRV8308 can also drive motors open-loop using a duty cycle command, from either a clock or register setting.
An assortment of protection features bolster system robustness, as the DRV8308 handles and reports overcurrent, overvoltage, undervoltage, and overtemperature.
The DRV8308 controls sensored brushless DC motors with advanced features and a simple input interface. As a predriver, 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 DRV8308 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. The DRV8308 can also drive motors open-loop using a duty cycle command, from either a clock or register setting.
An assortment of protection features bolster system robustness, as the DRV8308 handles and reports overcurrent, overvoltage, undervoltage, and overtemperature.
