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Device availability

David Thompson2
Intellectual 685 points
Other Parts Discussed in Thread: BQ20Z65-R1, BQ20Z655-R1, BQ40Z50, BQ20Z65, BQSTUDIO

Hi,

We are (were) just about to start a new product design with the BQ20z65-R1 as it was listed as a newer replacement for the BQ20z95. However, both these parts are now flagged as NRND.

I see that the BQ20z655 is pin-pin compatible but I have no idea how long this has been around or wether it too is likely to head for obsolescence. 

Can you advise on a suitable alternative to the 20z65/95 and/or show me how I can find out how long parts have been in the market (assuming that's a reasonable indicator of product lifespan).

Lastly, what the difference between a device like the BQ20z655-R1 and the BQ40z50? To me, they appear to be the same but it's hard to compare them.

Thanks.

  • 0
    TI__Guru 73830 points

    David,

    These devices may have been moved to NRND status, but that does not mean that they are obsolete or no longer in production. As we release newer, higher performing devices and upgrade the Impedance Track algorithms, we move older technologies to NRND status to encourage users to move to our newer devices. The bq40z50 is built on our newest hardware platform and has the latest IT updates. It also offers many more parameters to the user to increase flexibility and aid in analyzing issues that you may encounter. The bq20z devices will continue to be manufactured, but new firmware updates will not be available moving forward.

    Regards
    Tom

  • 0 in reply to ThomasCosby
    Intellectual 685 points

    Hmmm.... well given the longevity of our products, it would seem inadvisable for us to use the BQ20z65-R1. Annoying as we have literally just had a PCB spun for that device and the new one is a different footprint! 

    When will the BQ40z50 become readily available? It's currently only available on a 6 week lead-time in minimum quantities of 250. I've ordered some samples but the 3 I'm allowed isn't really enough to prove out a product.

    Also, how stable is the BQ Studio software? I notice its only a preview - are the features that don't work/aren't fully tested? Given the grievances we have had with the BQ Easy & the EV2300, I'm wary of a preview version (the EV2300 is especially poor with the HPA495 calibration board)

    Regards,

  • 0 in reply to David Thompson2
    TI__Guru 73830 points

    David,

    You can continue to use the bq20z65, especially if you have experience with the device and it works well for you. There are millions of this device in use and it has proven to be a very good gauge.

    You should be able to order 20 samples from the TI sample request system and it shows that the samples are in stock. The system also shows that there are plenty of device available for production order fulfillment.

    I have found bqStudio to be stable. We are adding new features to the platform periodically and the Preview status should be removed after all of the features are in place. The program will be updated on the web as new devices are added to it.

    Regards
    Tom

  • 0 in reply to ThomasCosby
    Intellectual 685 points

    Ok, Thanks for your help.

    One final question - slightly off topic - why does the BQ40z50 have a separate overvoltage protection IC when the BQ40z50 already incorporates OV protection?

    Thanks

  • 0 in reply to David Thompson2
    TI__Guru 73830 points

    Some battery pack manufacturers require a back-up over-voltage protection device to take over and blow the fuse in the event that the primary device fails.