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BQ294502: The reference design for UL2595

Wu JW
Intellectual 2935 points
Part Number: BQ294502
Other Parts Discussed in Thread: BQ77905

Hi, Team,

My customer want to use BQ294502 to do the 2~3Cell battery protection. Need to pass the UL2595, do we have some suggestion for this? How about the reference design or just use the circuit as the EVM? Thanks!

  • 0
    TI__Mastermind 42535 points
    your question has been assigned to an AE. It will be answered shortly.
  • 0
    TI__Guru* 77283 points
    Hi,

    The UL2595 standard is a system requirement that covers the combination of the battery, charger, and the end-product. The BQ294502 provides over-voltage protection for the battery cells, but this is only one consideration for the whole system. I am not familiar with all of the requirements for the UL2595, but we also have more advanced protector devices if they need more than just over-voltage protection. (i.e. under-voltage, over-current, short-circuit, over-temperature, under-temperature, open circuit, etc.)

    The EVM schematic is a good reference design for their circuit.

    Best regards,
    Matt
  • 0 in reply to Matt Sunna
    Prodigy 135 points

    HI ,  if   we  use  BQ77905+BQ2945xx   for   3S  Protection ,   design for UL2595,  what   The EVM schematic  shoud be  Improve?

  • 0 in reply to lun zhang62
    TI__Guru* 77283 points
    Hi Lun,

    Your customer will need to understand the requirements of the UL2595 spec and design their system to meet these requirements. I cannot say if anything is needed in addition to the EVM schematic. The BQ77905 has many protection features, but UL2595 is a system level specification and I am not familiar with the charger products or the requirements to meet the UL2595 standard.

    Best regards,
    Matt