STMicroelectronics has recently revealed the reference design for “EVLDRIVE101-HPD” their homegrown BLDC motor driver board that can drive up to a 750W BLDC motor. This compact 50 mm (1.9-inch) circular PCB combines STDRIVE101 3-phase, triple half-bridge gate-driver IC with an STM32G0 microcontroller, which is responsible for driving three-phase brushless motors.
The driver board supports various motor-control strategies, including trapezoidal and field-oriented control (FOC), with both sensor’ed and sensorless rotor-position detection. Additionally, it has a wide operating voltage range of 5.5V to 75V and includes STL220N6F7 60V STripFET F7 MOSFETs, which have very low Rds(on) for high efficiency. Other features of the board include ultra-low power consumption in sleep mode, a single-wire debug interface, direct firmware update capability, and protection mechanisms such as under-voltage lockout, overtemperature protection, and cross-conduction prevention. All these features make this board suitable for applications like hairdryers, handheld vacuums, power tools, fans, drones, robots, and industrial equipment drives.
ST’s EVLDRIVE101-HPD BLDC motor driver specification
- Microcontroller
- STM32G071KB based on Arm Cortex-M0 core
- 36 Kbytes of SRAM
- 128 Kbytes of Flash
- Gate Driver
- STDRIVE101 triple half-bridge gate driver
- 600 mA source/sink capability
- Operates from 5.5V to 75V
- Integrated voltage regulation for high-side and low-side gate drivers
- Configurable drain-source-voltage (Vds) monitoring protection
- Power Stage
- STL220N6F7 60V, STripFET F7 MOSFETs
- Typical Rds(on) of 1.2 m
- Output current up to 15 Arms
- 750W power stage
- Control Strategies
- Trapezoidal control
- Field-oriented control (FOC)
- Sensored and sensorless rotor-position detection
- Protection Features
- Undervoltage lockout (UVLO)
- Overtemperature protection
- Cross-conduction prevention
- Overcurrent protection
- Vds monitoring of power-stage MOSFETs
- Protection against reverse biasing from power stage outputs
- Debug and Programming
- Single-wire debug (SWD) interface
- Direct firmware update via UART
- STDC14 debug connector
- Additional Features
- External turn-on/off trigger for low-consumption standby
- Input connector for Hall-effect-based sensors and encoder
- Back-EMF (BEMF) sensing circuitry
- Current limiter with adjustable reference
- Bus voltage monitoring
- Temperature sensing
- 5 spare GPIOs
- Board Operating Voltage – 18V to 52V
- Power Consumption
- Sleep mode consumption below 1uA
- Fast power-on circuitry disconnects the power source when idle
- Dimensions – Circular PCB with a diameter of 50mm
Previously we have written about similar low and high-power motor drivers including the NickStick BV SwarmDrive, the ODrive Micro BLDC driver, and FOCn ESP32-S3-based, medium-power BLDC driver and much more feel free to check those out if you are looking for a motor driver board.
The EVLDRIVE101-HPD BLDC motor driver board includes the STDRIVE101 triple half-bridge gate driver, which is a single-chip, low-voltage gate driver for three-phase brushless motors. The chip has a wide input voltage range of 5.5 V to 75 V and includes an integrated low-drop linear regulator and bootstrap circuitry for gate driver supply, along with under-voltage lockout (UVLO) protection. It supports two input strategies, selectable via the DT/MODE pin, with cross-conduction prevention through interlocking or deadtime generation. Additional features include VDS monitoring for MOSFET protection, thermal shutdown, and a standby mode for reduced power consumption to 1 uA.
The company uses six STL220N6F7 MOSFETs for the gate driver IC which utilizes STripFET F7 technology with an enhanced trench gate structure that results in very low on-state resistance of 1.2m, while also reducing internal capacitance and gate charge for faster and more efficient switching.
ST’s EVLDRIVE101-HPD board uses the STDRIVE101 and a TSV991ILT CMOS Op-Amp to achieve current sensing. The board also includes undervoltage lockout (UVLU), and back EMF (BEMF) current sensing and limiting. It also includes a connector for Hall-effect sensors and an encoder. More information about the board can be found on the ST’s product overview page and some more information is available on the press release. You can also check out the data brief and user manual for additional info which can be found on that same STs page.
The STMicro’s EVLDRIVE101-HPD BLDC motor driver board is priced at around $93.76 for a single unit and can be prchased from Mouser Electronic.
Debashis Das is a technical content writer and embedded engineer with over five years of experience in the industry. With expertise in Embedded C, PCB Design, and SEO optimization, he effectively blends difficult technical topics with clear communication
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That’s a hell of a technology demo. I could use a few.
It it can be used up to 750 watt motor. Not for only750 watt motor .
I would love to see a hairdryer with a 750W fan motor.