• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 63 subscribers
  • Views 248 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS1HC100-Q1: Reverse battery protection when sharing GND resistor and diode between 2 devices

Masaru Oinaga
Expert 4355 points
Part Number: TPS1HC100-Q1
Other Parts Discussed in Thread: TPS1HC30-Q1

Tool/software:

Hello, Team,

We have a question from our customer when using two TPS1HC100-Q1 which are configured to not turn on at the same time.

  1. Can those two HSS share the same GND 1k resistor (R_GND) and the diode (D_GND)?

    R_GND = R11 1k; D_GND = D1

  2. If above is ok, does the reverse battery protection feature work for both devices?

Best Regards,
Masaru

  • +1
    TI__Mastermind 34905 points

    Masaru,

    Yes- completely acceptable to share the diode network. The reverse battery protection would be covered for both devices.

    Side note as I don't know if the schematic you shared is complete, but I would recommend not leaving the ILIM pin floating. The "internal current limit" (which is what is defaulted to if the ILIM pin is floating) is meant to be more of a failsafe condition if the ILIM resistor gets damaged. If you need a higher range of current limits then the TPS1HC30-Q1 would work.

    Best Regards,
    Tim