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  • TI Thinks Resolved

TPS56C215: Product came back from the field with a malfunctioning module

Prodigy 60 points

Replies: 3

Views: 115

Part Number: TPS56C215

Dear Team-

I received the product from the field and after analyzing the power management system, I found out that the TPS56C215 failed. Upon power on, I could hear buzzing noise. After I desoldered the IC and soldered a new one, the module started operating normally. The IC did not look fried or damaged. 

I would like to know if there are any known reasons for why the chip would fail in such a way.

The input to the module is 12V from TI LMR14050SQDDAQ1. The output is 5V with 10A max load and typical operating current of 0.5A. The product is deployed outdoors in a waterproof enclosure. It has been running for about 7 months until it failed. Other products with identical hardware have been deployed in similar conditions and have not failed. 

I would like to know what happened number one, and number two if there is a way to prevent such failure from happening in the future. 

The schematic is attached.

Best,

Rob

  • Hi ROb,

    Did you check which pins failed? and How many boards get failed?

    You can leave Email here, we can discuss more with Email...

    Yuchang

  • In reply to Yuchang Zhang:

    Hi Yuchang

    I sent you a direct message with my email but have not heard back. What is your email?

    I checked the output pin and it was shorted to the ground pins. I have not checked the rest. I have 2 boards that failed.

    Best,

    Rob

  • In reply to Robert Kim:

    Hi Kim,

    Just saw your Email, this thread can be closed and I will give you feedback by Email.

    Yuchang

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