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.
| Documentación principal | Tipo | Título | Opciones de formato | Descargar la versión más reciente en inglés | Fecha |
|---|---|---|---|---|---|
| * | Hoja de datos | DRV8308 Brushless DC Motor Controller datasheet (Rev. B) | PDF | HTML | 13/11/2017 | |
| Nota sobre la aplicación | Best Practices for Board Layout of Motor Drivers (Rev. B) | PDF | HTML | 14/10/2021 | ||
| Nota sobre la aplicación | Hardware Design Considerations for an Electric Bicycle using BLDC Motor (Rev. B) | 23/06/2021 | |||
| Nota sobre la aplicación | System Design Considerations for High-Power Motor Driver Applications | PDF | HTML | 22/06/2021 | ||
| Nota sobre la aplicación | Understanding Smart Gate Drive (Rev. D) | 1/03/2021 | |||
| Informe | Power Electronics in Motor Drives: Where is it? (Rev. A) | 1/10/2019 | |||
| Nota sobre la aplicación | Hardware Design Considerations for an Efficient Vacuum Cleaner Using a BLDC Moto (Rev. B) | PDF | HTML | 6/03/2019 | ||
| Artículo técnico | Simplifying gate driver design for brushed DC motors | PDF | HTML | 30/06/2015 |
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The three-phase brushless motor pre-driver DRV8308 drives sensored brushless DC and brushless AC (BLAC) - often referred to as permanent magnet synchronous (PMSM). Aimed at 12V and 24V motors, this configurable pre-driver features an integrated digital speed loop with advanced commutation (...)
This advanced motor implements closed-loop speed control to maintain an exact RPM across the load torque profile. The magnetic rotor position is sensed by the DRV5013 Hall-effect sensors, and the DRV8308 controller decides when to drive the CSD88537ND FETs that energize the coils. No (...)
| Encapsulado | Pines | Símbolos CAD, huellas y modelos 3D |
|---|---|---|
| VQFN (RHA) | 40 | Ultra Librarian |
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