Solution Description
This solution describes how to easily drive a specific 24V BLDC motor using a simple CAN interface and can be customized for similar Hall-effect sensor three-phase motors compatible with a 12, 24, or 48 V bus.
Thanks to its field-oriented control (FOC) algorithm, this compact, low-noise, high-precision drive is controllable using the standard CAN ‘command set’ from any existing domain/zone controller without having to deal with control loop bandwidth and resource requirements.
Designed for brushless motors in automotive applications, the L9908 drives 6 independent Power MOSFETS organized in three-level half-bridge topology to control three-phase BLDC motors. An SPC56 P Line automotive microcontroller running the motor control firmware communicates with the CAN controller of the vehicle’s general-purpose microcontroller via a high-speed L9616 bidirectional CAN transceiver responsible for signal conditioning and processing.
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Key Product Benefits
L9908 Automotive 3-phase motor gate driver unit
- Each channel can be independently configured for driving different loads
- Safe operation is ensured by shoot-through diagnosis, dead-time, short to battery, short to ground and open load detection plus real-time phase voltage monitoring.
L9616 Automotive high-speed CAN bus transceiver
- Supports data rates up to 1 Mbaud using either shielded or non-shielded line pairs
- Includes slope control mechanism to reduce RFI and EMI
SPC560P50L5 32-bit Power Architecture MCU
- Flexible solution with memory sizes up to 1 Mbyte and ADCs to ensure a perfect fit in terms of performance versus application needs
- Seamless upgrades if application requirements change over time
- Fail-safe protections
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All Features
- Supply voltages: 12, 24, and 48 V
- Depending on the selected motor:
- Rated power: 65 W
- Rated torque: 13 Ncm
- Rated current: 3.26 A
- Rated voltage: 24 V
- Rated speed: 4840 rpm
Considering just the board, the absolute maximum current rating is 80A @ 25°C
All key products are Automotive-grade devices.
