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TPS25982: TPS259827L

Chahin SAKKA
Prodigy 20 points
Part Number: TPS25982

Tool/software:

Hi,

We have designed a protection board for an ESC board using the TPS259827LNRGER IC to protect against inrush current, undervoltage, etc. (Please see the attached schematic.)

We are currently facing issues when using this protection board. Attached, you will find two oscilloscope captures:

  • The top one shows the behavior with the protection board.

  • The second one shows the behavior without the protection board.

These waveforms were captured during a motor activation where it switches from standby directly to high RPM (so this is not related to the inrush current at power-up).

With the protection board, the current reaches 15 A, after which the TPS259827LNRGER shuts off the output voltage and enters auto-retry mode (i.e., the board enters the reset phase).
Without the protection board, the current only reaches 10 A, and the motor runs normally without interruption.

Could you please help us understand this behavior?

Kind regards,



kind regards

*Note : the Cout capacitor (200uF) is placed at the downstream board ( ESC ), due to space issues. 

 

  • 0
    TI__Mastermind 38335 points

    Hi Chahin,

    Is this issue resolved?

    As you pointed out, this is not inrush current. As such eFuse itself won't cause any current increase. Here, the eFuse is limiting the current to below 15A. The load profile for with eFuse vs without eFuse looks very different. Can you check on the load profile.

    Best Regards,
    Arush