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TPS65994AD: For control other buck-boost

Jeff YANG
Mastermind 7795 points
Part Number: TPS65994AD
Other Parts Discussed in Thread: TPS65994BG, BQ25758, TPS55288

Hi,

I would like to know TPS65994BG can support EPR 5V/9V/12V/15V/20V/28V @5A with other comeptitor buck-boost controller?

Does there have technical document for how to modify I2C config after PD3.1 hand shake?

Thanks!

Jeff

  • 0
    TI__Genius 12705 points

    Hi Jeff,

    Yes, TPS65994BG can support EPR with a different buck-boost controller than what we recommend and include in our reference designs. However, it will be difficult to setup the DCDC properly over I2C. TI does not have documentation for generic DCDC programming with BG EPR source.

    Can you help us understand why you are looking to pair a competitor DCDC buck-boost with TPS65994BG? Our recommendation currently is to use BQ25758. This is a battery charger IC that acts as a buck boost converter. If you want more information, I can send you details on it.

    Please keep in mind that because supporting external DCDCs is difficult and takes a lot of effort, TI will not be supporting any other DCDC pairing with TPS65994BG EPR source, with the exception of BQ25758 and one other DCDC that will be ready later this year.

    Best,

    Alex

  • 0 in reply to Alex Liu
    Mastermind 7795 points

    Hi Alex,

    Customer want use MP4248, because it have integrate 2 MOSFET can reduce board space.

    Our TPS55288 only can support to 20V/5A, can't support to 28V/5A.

    Thanks!

    Jeff

  • 0 in reply to Jeff YANG
    TI__Genius 12705 points

    Hi Jeff,

    Yes. The TPS55288 can only support 20V 5A. This is not suitable for use with 994BG EPR source.

    We only offer support for BQ25758 and the other DCDC I mentioned (yet to be released). BQ25758 is a buck boost that is 240W EPR capable and has integrated gate drivers for external FETs. It does not have integrated FETs. Any external buck boost can be used, but will not receive any configuration help if it is not one that we support. When using BQ25758, we will help provide I2C configuration support for the buck boost.

    Let me know if you want me to send you information on the BQ25758. I can reassign to our BQ team and have them provide details.

    Best,

    Alex