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BQ25180: Missing non-volatile user configuration storage

Alberto Farre Gomes
Prodigy 40 points
Part Number: BQ25180
Other Parts Discussed in Thread: LP5562

Most of IC chargers use hardware configuration. BQ25180 goes beyond with its powerful I2C configuration, but missing any sort of non-volatile storage of configuration sent through I2C. Just like other TI products do, like LP5562.

Think a simple device with power on/off switch and USB connector for charging. Being the device in FULL POWER OFF (including MCU), if you connect an adapter to USB connector, BQ25180 will always start to charge with default configuration.

Not too bad for me because BQ25180 defaults closely match my needs, even that I would prefer an ICHG slightly higher than default 10mA, among other parameter tunning.

I would like to know if I am right with such BQ25180 behavior or I missed something.

Best Regards,

Alberto Farre

  • +1
    TI__Mastermind 23410 points

    Hi Alberto,

    Yes, you're correct in that the BQ25180 will revert to it's default settings if there is no power connected to it (no VIN or VBAT present or waking up from shipmode or shutdown mode). It's recommended on startup to run through I2C transactions for the desired settings.

    Best Regards,

    Anthony Pham

  • 0 in reply to Anthony P Pham
    Prodigy 40 points

    Thank you very much for confirming my doubts.

    Since it is a very new IC, if you accept suggestions, let me say that the configuration sent by I2C should be better stored in SRAM, this way BQ25180 could replace any hardware configured charger IC, in addition of being capable of charge devices that are completely OFF without the need of turning MCU on.

    Best Regards,

    Alberto Farre