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Original question:

BQ77207: BQ77207

BQ77207: BQ77207

John Beardwell
Prodigy 10 points
Part Number: BQ77207
Other Parts Discussed in Thread: BQ77307

Tool/software:

Same question has been asked a few times so apologies for the repetition.

Firstly there doesn't seem to be any way of contact a UK representative?

I know you're a U.S. company but do have a UK office with no number advertised?

I did manged to contact customer support sometime on Friday, E U.S. local time being 3 A.M. so appreciated being able to talk to someone.

However the line was very poor and may have not got my details?

Have rung again today (similar time) and no answer referring me to the website.

So the question being;

How do I obtain samples of the BQ77207 configured to a particular requirement.

I'm only looking for 10's-100's so my concern is that another potential customer posting on here requested 20K off and was told that wasn't possible.

I'm hoping that was too many!

Please let me know if you can help as we have a products ready for the U.S. market and the charging circuit is holding us back.

Best Regards from the U.K.

JohnB.

  • 0 in reply to John Beardwell
    TI__Expert 3425 points

    Hi John, 

    Apologies for the delay, our team that works though the E2E inquiries is very short handed at the moment. 

    I'm the product marketing engineer responsible for this device so happy to help out here. 

    The BQ77207 can only be programmed via TI factory as it is OTP (one time programmable), because of this we must have a good business case to commit resources to bring a customized device to market. While we are able to provide small batch samples, the commitment is fully driven by the business case of such a device as we do not charge customers for this service. 

    We can of course move this discussion to a more direct channel to determine your anticipated volumes and production dates. I'd also like to loop you in with our UK teams covering the region, so sorry you've had so much trouble contacting them. 

    One last thing I will mention is that the BQ77307 is one of our only host-programmable protectors via I2C and will have more features than the BQ77207. If you currently have an MCU in system this may be the best and fastest option. The MCU is required since the settings are stored in RAM and will clear on each power cycle of the device, at which point the host will need to write the settings when the device is brought back up. 

    Hope this helps clarify your question. 

    Best, 

    -Luis Torres

  • 0 in reply to Luis Torres
    Prodigy 10 points

    Hi Luis and thanks for getting in touch.

    I am part of a small UK company and have joined recently and have been tasked with sorting out a few on going issues, the main one being the deep discharge of Li-Po batteries, the chemistry of the current 5S pack needs an OVP of 22V and a UVP of 16V.

    This may change slightly but the main issue is most, if not all BMS's have a much lower UVP and having experimented at 2V5/2V7 per cell found it was irreparably damaged so definitely need the higher voltage.

    As we are small the current production runs are 20-30 units so would only be looking for 50 devices initially.

    There is no MCU inside the product so we're unable to use the other device you recommended and already have a PCB layout to accommodate the BQ77207.

    We have 2 orders, one for AUS and one for the US which is a market we'd really like to break into and feel our product is innovative and a leader in it's field.

    However the issue of the correct device for the BMS is holding us back.

    Really hope you can help us out.

    Please if you can reply to my work email;

    johnb@9gcomms.co.uk

    Would be much appreciated.

    Best Regards from the UK.

  • 0 in reply to John Beardwell
    Prodigy 10 points

    HI Luis. I'm still awaiting a reply can you please put me in touch with someone who can help.

    Regards

    JohnB.

  • 0 in reply to John Beardwell
    TI__Expert 3425 points

    Hi John, 

    I'm working on getting a contact to reach out to you. Appreciate your patience. 

    In regard to the application using the BQ77207, you are correct that for LFP the BQ77207 may not be the best fit as it is better suited for Li-ion , Li-polymer chemistries and not originally designed for LFP. The catalog is indicative of that since the voltage levels generally do not compliment the use of LFP cells.  

    I'd still urge you to reconsider the BQ77307 as this UVP can be programmed with little limitation on the programmable range (should easily hit your threshold), providing the best flexibility. I'm afraid that the business case is not sufficient to kick off a development. 

    Please be on the lookout on our device product pages as we are periodically adding new skews which may fit your application. 

    BR, 

    -Luis Torres