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TLC5926: Alternative for Stmicroelectronics product

Gerald
Genius 9570 points
Part Number: TLC5926

Hi Experts,

May I ask for help? Our customer is looking for alternate pin to pin drop and replacement for STP16CP05XTTR. They have found out the possible option might TLC5926IPWPR/TLC5927IPWPR. May I ask if you can also confirm if they can use these parts without any HW/SW change? Or is there a more suitable TI part as an alternative? I also tried to check a possible alternative with BOM & cross reference tool but was not able to find a direct replacement.

I hope you can help us. Thank you so much in advance.

Kind regards,
Gerald

  • +1
    TI__Genius 12915 points

    Hi Gerald,

    Yes I think the HW and SW are both compatible with TLC5926/7. One little difference of input data format is that STP16CP05XTTR need an additional 17th clock while writing data. It seems used for sample latch signal, which is no need for TLC5926/7.

  • 0 in reply to Hardy Wu
    TI__Genius 9570 points

    Hi Hardy,

    Thank you so much for your previous response.
    Our customer still have few more question and concerns:

    1.TLC5926/7 has some extra protection features as compared to STP16CP05XTTR. E.g
    OPEN-LOAD DETECTION
    SHORT TO GND DETECTION
    SHORT TO VLED DETECTION
    Does it create any issue If we do not use these?

    2.In the TLC592x has two operation modes and three phases: Normal Mode phase, Mode Switching
    transition phase, and Special mode phase. The device can be switched between the modes.
    What is the default mode of operation?
    Do we need the software change/control the modes?
    If device enter in one mode(Special mode) who we can bring it back to normal mode without Software intervention?

    Kind regards,
    Gerald

  • +1 in reply to Gerald
    TI__Genius 12915 points

    Hi Gerald,

    1. No there should be no issue if user do not use them. Fault detections only raise fault flags in internal resistors, to see if there are any LED connection faults, but have no further action when the faults happen. 

    2. After power on, the default operation mode is the normal mode. If user do not need to change the current gain and read the error registers, there is no additional SW change required. Re-power the device can bring the device back to normal mode.