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TPA6130A2: Concern regarding output short condition

Kazuki Kuramochi
Genius 10755 points
Part Number: TPA6130A2


Hello Expert,

I have question regarding TPA6130A2's design regarding short condition.

Our customer worrying about happen short condition but there isn't any short projection function on TPA6130A2.
However we found over temperature function on this and we guess it is for preventing damage by short condition.
First of all, Is this assumption correct?

Second, I'd like to know about whether there is data regarding maximum transient output current when happened short condition.
Could you provide this?
This is because, we need this data for considering to add over current protection circuitry on the outside of device.

As I said that this device don't have any feature which protecting over current event but I expect maximum output current is limited by CP circuit.
If you have any comment for above assumption, it is helpful for me.


Thank you and best regards,
Kazuki Kuramochi

  • 0
    TI__Guru* 84915 points

    Hi, Kuramochi-san,

    Regarding the output short protection, this is correct. This device doesn't have an overcurrent protection circuit that could be triggered by a current threshold value. However, the device increase the temperature on the overcurrent conditions, which will enable the thermal protection circuit under the overcurrent/shot circuit cases.

    What we have seen in previous cases is that the device can reach output currents up to 1A before the thermal protection is enabled.

    Best regards,
    Luis Fernando Rodríguez S.

  • 0 in reply to Luis Fernando Rodriguez S.
    TI__Genius 10755 points

    Hi Luis-san,

    Thank you for your reply and my short notice. 

    I'd like to ask you about the risk of causing permanent damage on device when happened short condition.
    You said short condition will cause OTP and output will be 1A.
    Then, could OTP perfectly prevent permanent damage on device by short condition?
    This is because, We want to remove the resistor on output line in series which is for preventing damage from large output current if OTP can prevent this damage.

    Best regards,
    Kazuki Kuramochi

  • 0 in reply to Kazuki Kuramochi
    TI__Guru* 84915 points

    Hi, Kuramochi-san,

    The OTP can avoid permanent damage against overcurrent issues. This is for output currents around 1A. However, if the device is constantly exposed to short-circuit events, there will be risk of damage due to the high current demand to the circuit.

    Best regards,
    Luis Fernando Rodríguez S.

  • 0 in reply to Luis Fernando Rodriguez S.
    TI__Genius 10755 points

    Hi Luis-san,

    Thank you for your explanation.
    I'd like to confirm about warranty of device.

    This is because, TPA6130A2's Absolute maximum rating regarding die temp is 125C but OTS's threshold is 180C.
    So I think you explained OTS can avoided permanent damage but you cannot guaranty it and warranty will expire if OTS is worked.
    Is this understanding correct?


    Best regards,
    Kazuki Kuramochi

  • 0 in reply to Kazuki Kuramochi
    TI__Guru* 84915 points

    Hi, Kuramochi-san,

    This is a good observation. What the absolute maximum ratings refer to the temperature range is that some of the electrical specifications may vary if the temperature range is surpassed. The thermal protection will be enabled at 180°C for a full circuit shutdown. This will allow to protect the device due to the high current consumption events.

    Best regards,
    Luis Fernando Rodríguez S.

  • 0 in reply to Luis Fernando Rodriguez S.
    TI__Genius 10755 points

    Hi Luis-san,

    Do you mean that there is possibility to degraded performance on EC table when happening OTP and there isn't possibility of causing fatal damage for device operation?

    Also, I'd like to know your answer for device warranty.
    As far as I know, All warranty would be expired if any parameter is exceeded absolute maximum rating at once.
    Therefore, we cannot guaranty any things if happened OTP.
    Is this correct?

    Best regards,
    Kazuki Kuramochi

  • 0 in reply to Kazuki Kuramochi
    TI__Guru* 84915 points

    Hi, Kuramochi-san,

    If the temperature increment is caused by the device current or a natural heat of the device due to the high power consumption, the device will be placed in protected mode without risk of damage. However, if the device is exposed to an external temperature and it doesn't decrease when the protection is enabled, it is possible to fall into a fatal damage. For those cases, the warranty is not applicable since it is outside the absolute maximum ratings.

    Best regards,
    Luis Fernando Rodríguez S.