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DRV110EVM: DRV110EVM

Jim Brooks
Prodigy 10 points
Part Number: DRV110EVM
Other Parts Discussed in Thread: DRV110

Tool/software:

I am developing a product that includes solenoids. There will be two driven in parallel.

Specs are

Supply Voltage - 24VDC

Coil Voltage rating - 12V

Coli Resistance - 2.5Ohms

I would like to increase the EVM capabililty with an external mosfet, but retain Pick and hold control as seen with the EVM.

Since the FET will be external, will I be able to use wire rather than a PCB to connect the FET to the EVM, solenoids and 24V supply?

Demo is expected some time next week so I don't have much time to implement this.

Thanks for any help you can provide.

Regards,

Jim Brooks

  • 0
    TI__Mastermind 44235 points

    Hi, 

    Thank you for your post. Monday September 1st is national holiday in US. Please expect delay or please wait for our expert assignment on Tuesday US time

  • 0
    TI__Expert 4620 points

    Hi Jim, 

    Thank you for reaching out to us.

    Although TI has not formally tested this specific configuration, we can offer some general guidance. When wiring external FETs, it's essential to consider the potential impact of parasitic wire inductance and resistance on the overall performance. To minimize these effects, you may want to try using short, thick, and twisted wires for a quick demonstration.

    Additionally, it's crucial to ensure that you're providing the required average gate current (IGate_AVE) to properly turn on the MOSFETs.
    Best regards, 
    Motjaba
  • 0 in reply to Mojtaba Afshar
    Prodigy 10 points

    This is what I was worried about. I am using the DRV110EVM and planning on replacing the stock FET with a 20A rated part (lower RDSon) This of course means higher gate capacitance. The FET I am planning on using is the Infineon IPD038N06NF2S. Gate capacitance is 3000pF at 1Mhz. I don't have the solenoid inductance yet. Will this exceed the drive capability of the DRV110?