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TPS92515: TPS92515 load transient issue

Lin Zhao
Intellectual 1230 points
Part Number: TPS92515

Hello,

I have a load transient issue needed to be solved urgently.

When we are using TPS92515 circuit to do the load transient test from 300mA to 500mA, it takes about 2s to return to stable status. It seems to be unacceptable. I attached the related schematic in the attachment.

Thanks a lot!

Y60 Schematic.pdf

  • 0
    TI__Mastermind 25500 points

    Hello Leo,

    Can you explain to me exactly how you are adjusting IADJ for the current transient? Would it be possible to get a scope shot with IADJ, SW, and ILED both over a long time span and then zoomed it to IADJ rising with still all 3 waveforms?

    Have you tried it with the EMI filters shorted to make sure it isn't some sort of interaction? What is your input voltage and LED stack voltage?

    Thanks,

    Clint