BQ25616: IC SMD BATTCHARGER BQ25616J QFN24 / MPN: BQ25616JRTWR/T heated up during use after few hours

Andreas MÄURER

Part Number: BQ25616

Tool/software:

IC started normally, after few hours in use, IC heating up, up to the moment of destroy. (meanwhile the second field fail used on medical device)

ABA test gives the clear few, that the IS is damaged, restart the Board with a new IC no malefunction occures.

IC SMD BATTCHARGER BQ25616J QFN24 / MPN: BQ25616JRTWR/T

From our point of view, it is necessary, that TI will analyse this IC, to get a clear overview which area of this IC is effected.

X-ray analyses with no detected fails

11 months ago

0 Michael Emanuel35 11 months ago

TI__Mastermind 40635 points

Hello,

Please send the schematic and layout so we can analyze if there is an issue with that.

Regards,

Mike Emanuel

0 Andreas MÄURER 11 months ago in reply to Michael Emanuel35

Prodigy 10 points

0 Michael Emanuel35 11 months ago in reply to Andreas MÄURER

TI__Mastermind 40635 points

Hello,

It does not look like the 1uF decoupling capacitor is on VBUS, rather it is 1 nF. There are some capacitors elsewhere, but they are separated by 100 ohms. Please add this required capacitor.

Regards,

Mike Emanuel

0 Andreas MÄURER 11 months ago in reply to Michael Emanuel35

Prodigy 10 points

Hi,

Many thanks for your feedback, we will check the situation and performance of our circuit against your suggestion. I keep you informed about the result.

Many thanks in advanced,

best regards

Andi

0 Andreas MÄURER 11 months ago in reply to Andreas MÄURER

Prodigy 10 points

Hi we see and parallel capacitor 10µF and 1nF (see red marks) whats your expertise?

0 Michael Emanuel35 11 months ago in reply to Andreas MÄURER

TI__Mastermind 40635 points

Hello,

Can you please send the full layout?

Please describe the fail and ABA swap results in more detail. Did the affected board work with a new unit? How many fails have occurred? Did the bad IC work on a good board?

What was the system load, the applied input, battery voltage, etc.?

Regards,

Mike Emanuel

Power management

Power management forum

BQ25616: IC SMD BATTCHARGER BQ25616J QFN24 / MPN: BQ25616JRTWR/T heated up during use after few hours