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TIDA-010240: Battery Backed 24V System Power rail.

Sanjoy Chakraborty
Prodigy 10 points
Part Number: TIDA-010240
Other Parts Discussed in Thread: BQ25750

Tool/software:

Hello,

We are looking for a simpler design to TIDA-010240 that provides a 24V ~10A peak current output that is backed up by Li-Polymer secondary batteries. Input supply is either 24V or 48V. This Reference design is too complicated for us to design and develop. Is there any simpler, lower BoM cost/component count, non-microcontroller based solutions that we need to consider?

Regards,

Mr. Chakraborty 

  • 0
    TI__Prodigy 680 points

    Greetings,

    One simpler, lower component count solution would be to use multiple of the BQ25750 chargers. This device supports 70V input, which would be suitable for the 24V or 48V input. The BQ25750 also integrates the ideal diode control, reducing component count/cost. The BQ25750 can operate in standalone mode without an MCU, however bit 2 (EN_BATFET_IDEAL _DIODE) on  REG0x19_Power_Path_and_Reverse_Mode_Control Register must be written to in order to allow for the ideal diode operation. 

    I have added a solution block diagram below showing the charging and discharging operation with this solution. 

    Best Regards,

    Christian

  • 0 in reply to Christian Greeff
    Prodigy 10 points

    Thanks Christian for this suggestion. We will be evaluating it as a candidate solution. Reading through the datasheets though, it doesn't look to be a solution that will function without a microcontroller, as you mentioned.