TPS1H200A-Q1: TPS1H200A-Q1

Part Number: TPS1H200A-Q1

Tool/software:

Good morning, i'm using TPS1H200A to drive a solenoid of about 500mA 24V. the configuration in showed in the schematic

The TPS don't work (input signal to 3.3V but output dont't swing at  VIN =24V). To solve the issue i need to reduce the value of R20 to 100ohm instead of 1K suggested by datasheet (see chapter 7.3.6.5 Reverse-Current Protection)

It's correct?

Regards

Paolo

  • Paolo,

    The problem here is that your CL resistor (R19) should be connected to the IC ground. What's likely happening here is that the device is thinking there is a current limit because of the addition resistance on the ground pin. If you connect R19 to IC ground this should solve your problem.

    Best Regards,
    Tim