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TIDA-01387: diode and current limiting resistor between Li-SOCL2 battery and supercapacitor?

Hwee Woon Ong
Prodigy 10 points
Part Number: TIDA-01387
Other Parts Discussed in Thread: TPS61021A

Hi,

Noticed that there is no diode (to prevent reverse current) and current limiting resistor between the Li-SOCL2 battery and the supercapacitor in TIDA-01387 schematic. But in the design guide document, in section 5.3 (hold time measurement), Ilim is mentioned. Are there any suggested method to do the current limiting or it's normally not required for Li-SOCL2 battery? Similarly for the diode, is it normally not required for Li-SOCL2 battery and supercap combi? Thanks.

  • 0
    TI__Mastermind 21565 points
    Dear Sir:
    Honestly speaking, I'm not familiar with the batteries. It's better to check with the datasheet of the battery to see if it has such requirement.
    And meantime, I'll check with my teammates, to see if they have some suggestions.
  • 0
    TI__Mastermind 40080 points

    Dear Sir,

    Li-SOCL2 battery has current limit, it depend on its capacity.  And for the TPS61021A, the reverse current can't flow through it. So reverse diode is not required.

    And if the maximum Iin < Li-SOCL2 maximum output current capability, then it is OK!