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Compact reference design for battery-operated brushless power tools based on STSPIN32F0252

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Parameter NameParameter Value
Target ApplicationPower Tools
Core ProductSTL130N8F7, STTH102A, TSV912, STN3P10F6, VIPer013, STSPIN32F0252
Packing TypeNot Applicable
RoHs compliantEcopack2
Package NameCARD

The STEVAL-PTOOL2V1 BLDC driver reference design is tailored for battery-operated power tools using 8S to 15S battery packs. It is based on the STSPIN32F0252 motor controller with embedded 3-phase, 250 V gate driver and low-power STM32 MCU. The power stage is based on the STL130N8F7 power MOSFETs or any similarly rated device in a PowerFlat 5x6 package.

The board implements single shunt sensing topology with both field-oriented control

(FOC) and sensored or sensorless 6-step control supported for driving permanent magnet synchronous motors (PMSM) and brushless DC (BLDC) motors.

The companion 6-step STSW-PTOOL2V1 firmware is ready to use with position feedback from phase Hall-effect sensors.

This reference design can deliver up to 19 A continuous current with very good thermal dissipation performance thanks to the mounted heatsink. It is compatible with a wide input voltage range from 20 to 72 VDC, and includes an auxiliary power stage with the VIPER013 in buck configuration to generate +12V and +3.3V supply voltage required by the application.

The STEVAL-PTOOL2V1 features a potentiometer for speed variation and protection features include thermal shutdown, undervoltage lockout, and overcurrent protection.

This compact 80 mm x 58 mm design is ideal for power tools and any similar battery-operated applications in terms of architecture, rating and performance.

Key features
  • Input voltage from 20 VDC to 72 VDC
  • Recommended for power tools supplied from 8S to 15S
  • Output current up to 19 Arms
  • Overcurrent threshold set to 36 A peak
  • STSPIN32F0252 featuring
    • 250 V, 1 A, 3-phase gate driver
    • SmartShutDown OCP
    • Cortex-M0 STM32
  • STL130N8F7 MOSFETs power stage featuring:
    • VDS = 80 V
    • RDS(on) max.= 3.6 mΩ
    • PowerFlat 5x6 package
  • Compact footprint (80 mm x 58 mm)
  • Heatsink for best power dissipation performance
  • Single shunt current sensing, suitable for:
    • Sensored or sensorless 6 step algorithm
    • Single-shunt vector (FOC) algorithm
  • Digital Hall sensors and encoder input
  • Plug-and-play thanks to available six-steps firmware with Hall-effect sensors feedback
  • Speed regulation through trimmer
  • Fully protected:
    • Thermal shutdown
    • Undervoltage lockout
    • Overcurrent protection
  • Bus voltage sensing
  • 12 V VCC and 3.3 V VDD supplies
  • Serial wire debug (SWD) port for debugging/programming
  • UART TX RX interface available
  • Easy user interface with buttons and trimmer