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Original question:

TL431: Low Ika TL431

TL431: is there a part has adverse logic with TL431

Given Ding
Genius 10085 points
Part Number: TL431
Other Parts Discussed in Thread: TL432

Hi Team,

There is question from customer. 

Customer use TL431 as below.  But for the comp connection, customer make a mistake that comp ( control error voltage ) is connected to pin3 and pin3 is also connected to GND with a resistor. Then customer want to check with us if there is part that internal Vref is connected to positive input of internal amplifier and FB is connected to negative input. I have checked on website and there seems no such product. Pleas kindly add your comments. Thanks. 

  • 0
    TI__Mastermind 19580 points

    Hi Given,

    Sorry to ask, this is a bit confusion to understand. Can you draw out the customer problem?

    From my understanding, the C1 is connected between pin 2 and pin 3 on TL431.

    Are you looking for an alternate pin out? We do offer TL432 where pin 1 and pin 2 are switched. But I do not have a device where pin 1/2 are switched with pin 3.

    -Marcoo