Product details

Rating Catalog Architecture Gate driver Control interface 1xPWM Gate drive (A) 0.13 Vs (min) (V) 8.5 Vs ABS (max) (V) 42 Features Hall Element Comparators, Integrated Motor Control, SPI/I2C, Tach/FG Feedback Operating temperature range (°C) -40 to 85
Rating Catalog Architecture Gate driver Control interface 1xPWM Gate drive (A) 0.13 Vs (min) (V) 8.5 Vs ABS (max) (V) 42 Features Hall Element Comparators, Integrated Motor Control, SPI/I2C, Tach/FG Feedback Operating temperature range (°C) -40 to 85
VQFN (RHA) 40 36 mm² 6 x 6
  • Three-Phase Brushless DC Motor Controller
    • Digital Closed-Loop Speed Control with Programmable Gain and Filters
  • Drives 6 N-Channel MOSFETs With Configurable 10- to 130-mA Gate Drive
  • Integrated Commutation from Hall Sensors
    • Timing Can Be Advanced/Delayed
    • 120° or 180°-Sinusoidal Current Control
    • Single Input Controls Motor Speed
  • Operating Supply Voltage 8.5 to 32 V
  • Flexible Configuration Methods
    • Read Internal Non-Volatile Memory
    • Read External EEPROM
    • Write SPI
  • Configurable Motor Current Limiter
  • 5-V Regulator for Hall Sensors
  • Low-power Standby Mode
  • Integrated Overcurrent, Overvoltage, and Overtemperature Protection
  • Three-Phase Brushless DC Motor Controller
    • Digital Closed-Loop Speed Control with Programmable Gain and Filters
  • Drives 6 N-Channel MOSFETs With Configurable 10- to 130-mA Gate Drive
  • Integrated Commutation from Hall Sensors
    • Timing Can Be Advanced/Delayed
    • 120° or 180°-Sinusoidal Current Control
    • Single Input Controls Motor Speed
  • Operating Supply Voltage 8.5 to 32 V
  • Flexible Configuration Methods
    • Read Internal Non-Volatile Memory
    • Read External EEPROM
    • Write SPI
  • Configurable Motor Current Limiter
  • 5-V Regulator for Hall Sensors
  • Low-power Standby Mode
  • Integrated Overcurrent, Overvoltage, and Overtemperature Protection

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.

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Technical documentation

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Type Title Date
* Data sheet DRV8308 Brushless DC Motor Controller datasheet (Rev. B) PDF | HTML 13 Nov 2017
Application note Best Practices for Board Layout of Motor Drivers (Rev. B) PDF | HTML 14 Oct 2021
Application note Hardware Design Considerations for an Electric Bicycle using BLDC Motor (Rev. B) 23 Jun 2021
Application note System Design Considerations for High-Power Motor Driver Applications PDF | HTML 22 Jun 2021
Application note Understanding Smart Gate Drive (Rev. D) 01 Mar 2021
White paper Power Electronics in Motor Drives: Where is it? (Rev. A) 01 Oct 2019
Application note Hardware Design Considerations for an Efficient Vacuum Cleaner Using a BLDC Moto (Rev. B) PDF | HTML 06 Mar 2019
EVM User's guide DRV8308 User's Guide (Rev. F) 12 Sep 2018
Technical article Simplifying gate driver design for brushed DC motors PDF | HTML 30 Jun 2015

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

DRV8308EVM — DRV8308 evaluation module for three-phase brushless DC motor pre-drivers

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 (...)

User guide: PDF
GUI for evaluation module (EVM)

SLVC552 DRV8308 EVM Software

Supported products & hardware

Supported products & hardware

Products
BLDC drivers
DRV8308 42-V max sensored sinusoidal control, 3-phase BLDC gate driver with SPI
Hardware development
Evaluation board
DRV8308EVM DRV8308 evaluation module for three-phase brushless DC motor pre-drivers
Reference designs

TIDA-00197 — Speed-Controlled 24V Brushless DC Outrunner Motor Reference Design

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 (...)
Test report: PDF
Schematic: PDF
Package Pins Download
VQFN (RHA) 40 View options

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