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TLV320AIC3109-Q1: TLV320AIC3109-Q1 support "short to VBAT 36V" and "short to GND" testing?

Vincent Chiu
Prodigy 190 points
Part Number: TLV320AIC3109-Q1

Hi 

We need to implement MIC input for automotive application, I survey the solution is TLV320AIC3109-Q1, however, we need to perform all MIC input with "short to VBAT 36V" and "short to GND" testing form ISO 16750-2.

Datasheet declare the "short circuit protection" however, we need TI's expert to confirm if TLV320AIC3109-Q1 support the fault protection ( "short to VBAT 36V" and "short to GND")?

Or we need to add additional protection IC/component?

Regards,

Vincent

  • 0
    TI__Mastermind 29535 points

    Hello Vincent,

    Please allow me to check with the team and get back to you.

    Is there any expectation that the device will return to normal operation after "short to VBAT"? 

    Best,
    Andrew 

  • 0 in reply to Andrew J
    TI__Mastermind 29535 points

    Hi Vincent,

    I got a response from our design team.

    Unfortunately, no TLV320AIC3109-Q1 analog inputs don't support this kind of short detection and protection. When this product datasheet mentions short circuit protection, it is related to headphone output pins. 

    Best,

    Andrew

  • 0 in reply to Andrew J
    Prodigy 190 points

    Hi Andrew

    Thanks for feedback. Further questions:

    1. TI has another automotive codec could support MIC input with detection & protection with "short t VBAT 36V"?

    2. If we want to implement TLV320AIC3109-Q1, need additional protection component, any suggestion from TI's expert?

     

    From the question " expectation that the device will return to normal operation after "short to VBAT"? " The answer is YES, according to ISO 16750-2 load test, the device need to work/operate normally when the  short condition is revomved.

    Regards,

    Vincent

  • 0 in reply to Vincent Chiu
    TI__Mastermind 29535 points

    Hi Vincent,

    Since this standard isn't part of the Q100 Automotive qualifications our Audio CODECs currently do not support this functionality. 

    You could try looking into TI's Isolation portfolio however, typically this standard only applies to the pins that are exposed to the battery directly and therefore analog mic pins and low voltage circuitry is not subject to this "short to VBAT conditions. Is there a specific OEM/End equipment that is requiring this? 

    Best,
    Andrew

  • 0 in reply to Andrew J
    Prodigy 190 points

    Hi Andrew

    Our customer request MIC input and speaker out on the ADAS ECU on external connector, which need to perform ISO 16750-2 "short to battery" testing with all signals. That's why we need to survey automotive CODEC & Amplifier solution or additional protection component.

    From TI's expert, currently, there is no automotive audio product could support "SO 16750-2 "short to battery" testing"? any roadmap declare will have solution in the near future?

    Regards,

    Vincent 

  • 0 in reply to Vincent Chiu
    TI__Mastermind 29535 points

    Vincent, 

    Thank you for the information about the application, feedback like this is a useful input for us. I would encourage you to create a thread regarding "36V short to Vbat" protection/isolation. The experts on these products may have some inputs here. 

    With regards to future solutions. Unfortunately, we cannot disclose roadmaps or pre-development parts on the public forum. 

    Best,
    Andrew