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TPS92515-Q1: Switching frequency range and FIT(failure rate)

Yuting Shao
Genius 13001 points
Part Number: TPS92515-Q1

Hi team,

1.Although this is a constant off-time device, how about the switching frequency range?

2.My customer cares about the FIT, but I can't find any data about it. Could you provide it?

Many thanks in advance!

Robin

  • 0
    TI__Mastermind 28655 points

    Hello Robin,

    The switching frequency range depends on the design and operating conditions.  If you have your operating range, Input voltage range and output voltage range I can calculate the switching frequency range.  The off-time is set by Roff, Coff and the LED string voltage.  If the LED string voltage is constant the off-time remains constant.  The on-time will change with input voltage change which causes the frequency to change.

    I have to look into the FIT.

    Best Regards,

  • 0 in reply to Irwin Nederbragt
    TI__Mastermind 28655 points

    Hello Robin,

    You can find the FIT information here:  www.ti.com/.../report

    MTBF/FIT estimates

    MTBF/FITMTBF/FIT supporting data
    MTBFFITUsage temp (°C)Conf level (%)Activation energy (eV)Test temp (°C)Test duration (hours)Sample sizeFailsAdditional comments
    5.69x109 0.2 55 60 0.7 125 1000 66423 0 —

    Best Regards,