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TPS1H000-Q1: Query on TPS1H000AQDGNRQ1 IC damage

Tejas P R
Prodigy 70 points
Part Number: TPS1H000-Q1

Tool/software:

Hi Team,

We are using TPS1H000AQDGNRQ1 in our project, Customer has reported us that the IC has blown up, So we are suspecting few possibilities that could cause the IC to get damaged, few of them are below.

1. What happen if output get shorted to GND?

2. What happen if output (24V) of the IC is connected to power supply(24V) directly?

Could you please clarify that on above scenarios, will affect the IC to get blown?

Best Regards,

Tejas

  • 0
    TI__Intellectual 2860 points

    Hi Teja's,

    In either of these conditions are their loads between the battery and the TPS1H000?

    1) Short to gnd shouldn't cause damage to the device however it may overheat and problems could occur if it operates in a short to gnd condition nominally

    2) Is their anything upstream of the device when the 24V are put on Vout?

    A reverse current condition could damage the device, are their any reverse current protections such as a blocking diode or a gnd network?

    Best Regards,

    Nicholas Petersilge

  • 0 in reply to Nicholas Petersilge
    Prodigy 70 points

    Hi Nicholas, thanks for your response...!

    We have not connected any diode for reverse polarity, When the output of the switch is 24V, client by unknowingly connected a different 24V supply to the output 24V., will this cause chip to burn out?

    Regards,

    Tejas

  • 0 in reply to Tejas P R
    TI__Intellectual 2860 points

    Hi Tejas,

    If the device is off it can handle a reverse polarity for less than 1 minute:

    Best Regards,

    Nicholas Petersilge

  • 0 in reply to Nicholas Petersilge
    Prodigy 70 points

    Hi Nicholas,

    As I mentioned in previous message, If device is ON (output is 24V) and unknowingly connected external +24V power supply, will it cause chip to get damaged?

    Regards,

    Tejas

  • 0 in reply to Tejas P R
    TI__Intellectual 2860 points

    Hi Tejas,

    Sorry I didn't see you mention that the device was on before,

    If the device is on and 24 volts is on OUT the main issue you will find is that the device is only allowed to have 1A of reverse current for 60s.

    This is because in a reverse current situation all of the protective features of the device are disabled so the current is able to go above the limit

    Best Regards,
    Nicholas Petersilge