• State
  • Locked Locked
  • Replies 2 replies
  • Subscribers 64 subscribers
  • Views 392 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

BQ24166: Part becoming too Hot

Needhu Gunasegaran
Intellectual 2890 points
Part Number: BQ24166

Hi Team,

Please see question from my customer below.

I have a question about the bq24166. When I am charging my battery the chip gets really hot (my infrared camera says more than 70°C). This is getting hotter than my wireless charging itself. I need to find a way to reduce temperature of the bq21466. I use the wireless charging as an input source. I measure 6.5V there and the current is about 1.6A (calculated with the help of the WPC input power of my charger). Can you help me and tell me why the bq24166 is getting so hot?

Thanks,

Needhu

  • 0
    TI__Intellectual 1910 points

    Hi,

    Can you measure the raw efficiency of BQ24166 only? It will be best if you can provide input voltage, input current, output voltage, output current of BQ24166. (Please beware that the input voltage measurement needs to be at the decoupling cap as close to device as possible as there will be PCB trace impedance). Once we have the efficiency data, there are couple possible next steps:

    1. If efficiency is not as expected, then we will need to debug what factor affects the efficiency.

    2. If efficiency is as expected, then we may have to find a more efficiency device.

  • 0
    TI__Guru**** 165886 points

    Needhu,

    Which package are using for the bq24166, QFN or WCSP?  If QFN, to how much copper is the chip's bottom pad soldered, either directly on the top or through vias to internal and/or the bottom layer?