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TLVH431 Pin2 question

Red Yen
Expert 4310 points

Hi Team,

as below, why Pin2 needs to connect to ANODE or left open?

my customer is aking if pin2 conntect to over 10V, any side effect

thansk a lot

  • 0
    TI__Mastermind 24485 points
    Hello Red,

    It is not recommended to connect pin 2 to 10V, are you worried about short from cathode pin?
    If so, will DBZ package (3 pin package) be a better option?

    Best,
    Michael
  • 0 in reply to Michael J Schultis
    TI__Expert 4310 points
    Hi Michael,

    why Pin2 needs to connect to ANODE or left open?
    since this is folating pin, any side effect if connect to 10V or more?
  • 0 in reply to Red Yen
    TI__Mastermind 24485 points
    Red,

    Pin 2 is the paddle. The die is glued to the paddle. This glue may or may not be conductive (I didn’t check). The lowermost silicon doping in the die is call substrate and connects to most negative device node which is anode. Any conductivity from the paddle, pin 2, will be to anode. The back of die silicon is very lightly doped if at all. There could be a Schottky diode curve between pin 2 and anode. Then again it could be open.

    From all this is it obvious the open and short to anode is safe usage.

    Because I suspect it is already connected to 10V, I will address that. There might be leakage current from pin 2 to anode connection. The leakage may be small and harmless. It might be higher and increase die temperature. It might be serious and cause much heat and could alter device performance.

    Best,
    Michael