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LM51561H: Absolute maximum rating current for BIAS pin.

Kengo.Y
Guru 10565 points
Part Number: LM51561H

Hi team,

I'd like to know the Absolute maximum rating current for the BIAS pin. 
My customer sees a 1A peak current on the BIAS pin.

Sincerely.
Kengo.

  • +1
    TI__Guru 71675 points

    Hi Kengo,

    Thank you for posting.  The BIAS pin basically feed current through an LDO to VCC pin.  There is not specially current limit function for the BIAS pin itself while the VCC has a output current limit.  1A peak sounds a lot for the BIAS pin although the pin may survive. Not sure if it is the result of some problem in your circuit. Could capture the BIAS pin waveform along with the line voltage waveform, so we can see if it is normal?  Also please share the schematic and the operating condition for the measurment.

    Thanks,

    Youhao Xi, Applications Engineering