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MCF8316C-Q1: for LIN pre-driver for DC & BLDC motors solution

Lawrence He
Expert 2740 points
Part Number: MCF8316C-Q1
Other Parts Discussed in Thread: MCF8329A, MCT8329A

Hi, Support Team

Do we have same function with MLX81340? spec as below link:

https://www.melexis.com/en/product/MLX81340/smart-LIN-motor-pre-driver-500W-gen3

if any suggestion, Please advise me.

Thanks,

Best regards,

Lawrence

  • +1
    TI__Expert 8840 points

    Hi Lawrence,

    The MLX81340 is an Open MCU Core, External FET driver. This means that you'd still have to modify and program the necessary motor control algorithm source code (such as FOC) into its built-in Flash memory. You also need external power FETs in your design to actually drive the motor, but depending on the external FETs you choose, you can achieve much higher power output to the motor.

    Whereas MCF8316C is a Closed Core, Integrated FET driver. This means the complex FOC algorithm is built-in to the device, requiring less coding and motor algorithm expertise, and you'd simply need to use I2C to configure register settings to fit your motor. The power-FETs are also integrated so the motor 3-phase wires can be connected directly to the MCF8316C. Since the FETs are integrated, this means the maximum power is limited due to the internal FETs (up to 8A peak current @ 40V abs max). In the real world, due to thermal constraints, most MCF8316C board designs can reliably drive a motor at ~70W steady state without overheating.

    A more close comparison to the MLX81340 would be our MCF8329 (currently under preview) which is also an external FETs driver. Here's a simple comparison table:

    MCF8329A MLX81340
    Pre-driver/gate driver Strength 1A/2A peak source/sink current to drive external FETs 300mA/500mA peak source/sink current to drive external FETs
    Abs Max Voltage 65V 36V
    Motor Control Algorithm Integrated FOC algorithm. User simply configure registers through I2C. Integrated open core MCU. User need to modify and program FOC code
    LIN bus Need external house-keeping MCU to implement LIN bus and to provide control commands such as SPEED, DIR, or I2C register write/read commands No need for external house-keeping MCU unless built in MCU runs out of Flash or other resources

    The MCF8329A is currently in preview, so it's not visible online (will RTM towards at end of this month), but you can refer to the MCT8329A for now since they have the same gate-drivers. The difference is that MCT8329A integrates Trapezoidal motor commutation algorithm, whereas the MCF8329A integrates FOC commutation algorithm.

    Hope this helps.

    Regards,
    Eric C.