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TPS63000 EVB GEtting Way too hot

Minh Nguyen
Prodigy 20 points
Other Parts Discussed in Thread: TPS63000EVM-148, TPS63000

Hello, 

 

We 've tried using the T¨PS63000 in a custom design. However it didn't work.

So we purchased a TPS63000EVm-148( HPA148 Rev A).

We didn't change any component on the board

Plugged on a Battery (2.8 to 3.7V), the TPS63000 Heats up quick and Fast.

Tried on a Laboratory alimentaion, it s the same reasult 

( It gets to 3.3 Volts but it s too hot.)

 

Can you help me ?

 

Thank You .

  • 0
    TI__Guru**** 150830 points

    How hot is too hot?  What temperature do you measure?

    Can you measure the input current and voltage to the EVM from the battery or lab supply?  Do you have a load connected at the output?

  • 0 in reply to Chris Glaser
    TI__Guru**** 150830 points

    Have you been able to resolve this?

    You can measure the input current and input voltage without any load on the output of the EVM to see how much power is actually being dissipated in the board.

  • 0 in reply to Chris Glaser
    Prodigy 20 points

    Hello

    The EVM is consuming 0.740A for 4 V input and no load.

    the chip is so hot you can't let your figer on it.

    Thank you.

     

  • 0 in reply to Minh Nguyen
    TI__Guru**** 150830 points

    Yes, it seems that the IC is damaged.  All of our EVMs are tested before they are stocked for shipment, so the damage could either be from ESD or from a 'hot-plug' event.  It is important to ground yourself before opening the static bag that the EVM comes in and to always work on an ESD mat.

    A hot-plug is when a voltage is quickly applied to the input through long cables.  This is the case when a lab supply is turned on and only after being turned on are the leads connected to the board.  The long cables create inductance which causes the input voltage on the board to overshoot and possibly damage the device if it exceeds the maximum rating.  The solution to this is to connect the leads of the input power supply and then turn on the voltage.  The power supply will soft start the voltage and control the overshoot.

    If you send me a message with your address, I can send you a new EVM for free.