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TPS61169 / thermal foldback

Guru 29690 points
Other Parts Discussed in Thread: TPS61169

Hi Team,

I understood TPS61169 features a thermal foldback function.
Is this protection auto recovery?
(Does the current limit value increase to normal one if the junction temparature decreases from 100℃?)

>When the junction temperature is higher than 100°C, the switch current limit ILIM is reduced automatically as Figure 2 shows.
I would also like to know the value of current limit of Ta>100℃. I couldn't catch the value in Figure2.

Best Regards,
Yaita / Japan disty

  • Hello Yaita-san,

    Yes, this protection will automatically recover when the junction temperature is below 100C.

    Best regards,
    Randy
  • Hello Randy-san,

    Thank you for your support.
    I understood.

    How about the following question?
    ----------------------------------------
    (datasheet page.10)
    >When the junction temperature is higher than 100°C, the switch current limit ILIM is reduced automatically as Figure 2 shows.
    I would also like to know the value of current limit of Ta>100℃. I couldn't catch the value in Figure2.
    ----------------------------------------

    Best Regards,
    Yaita

  • Hello Yaita-san

    The minimum activation is at Tj ~115C and reduces the current limit at a rate of ~ 0.07 A/deg C. Some devices will activate at a higher Tj but should have similar rate of current limit.

    Best regards,

    Randy