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seeking charger solutions

Ray Lin
Prodigy 695 points
Other Parts Discussed in Thread: BQ24072, BQ24040

I am seeking a charger includes below spec:

VIN 5V

Charging current 1A

Battery 4.2V

IC package around 3x3mm

LED function (charging/full charge/low battery alarm)

control mode: Stand-alone

can you give me suggestions ?

  • 0
    TI__Guru**** 167096 points
    Hi Ray,

    If you need powerpath, meaning a system rail at plug in even with discharged battery and precise termination current, then BQ24072 or other member of that family.

    If you don't need power path, then BQ24040.




    Regards,
    Jeff
  • 0 in reply to Jeff F
    TI__Prodigy 560 points

    Hi Jeff,

    May I know both BQ24072&BQ24040 support LED function of low battery alarm?

    I cannot see the function in spec.

    Could you explain more about normal input of Vdt and Voup?

    Thank you.

     

    Daisy Yang

  • 0 in reply to user4773197
    TI__Mastermind 21590 points
    Hello Daisy,
    Neither the BQ24072 nor the BQ24040 have an alarm for low battery. They have LED indication for VIN present and also charging and charge complete. Vdt is the detection threshold for when the device considers VIN present. This happens when VIN > VBAt + Vdt. VOVP is the voltage when we turn off the input voltage to protect the charger against high voltages.