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BQ51050B: NTC standard

Part Number: BQ51050B

Hello, 

We are currently looking on this wireless receiver with battery charger integrated device, and planning to implement it in our on-going project (handheld medical device). 

We recently found that the NTC monitoring for this device supports only JEITA. We do not have much knowledge about JEITA to be honest, but we wonder if this is widely used for the Li-Polymer batteries on the market, or this device is specifically made for some applications? 

The reason why I am asking is we have to find the right battery before we could design the resistors for the current limiting, termination current, and so on. If it turned out that JEITA is not widely used, it will suddenly bring up a lot troubles to find the right battery with NTC. 

This product is going to be launched in US market as we learned JEITA is a Japanese standard, we do not know if it will be a problem later on.

Sorry for the long tedious email, and thanks in advance!

Best regards

Weinan

  • Hi Weinan
    To implement JEITA in your system the NTC, Battery and Charger would need to support the standard. In this case the bq5105X does not. The NTC function is only the basic enable / disable charging in a temp range.
    See application note "Li-ion battery-charger solutions for JEITA compliance" :
    www.ti.com/lit/an/slyt365/slyt365.pdf