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LM833-N: LM833-N min power supply

Rocson He
Intellectual 1830 points
Part Number: LM833-N
Other Parts Discussed in Thread: LM833, LMP7732, LME49721

Hi Team,

Could you help double check what's the min single power supply for LM833-N ?

Is it 5V ?

It's not quite clear in spec. My customer would like to use 3.3V for supply, and need to double check.

Thanks.

  • 0
    TI__Guru** 102475 points
    Hi Rocson,

    You're right, 5V is the minimum supply voltage. This device may not be able to operate at lower supply voltage and it would also be out of spec.

    Best regards,
    -Ivan Salazar
    Audio Applications Engineer - Low Power Audio and Actuators
  • 0
    TI__Guru 53826 points

    Hi Rocson,

    Note that the "vs Supply Voltage" graphs are ±5V (split supply). This has tripped-up others, too.

    So the Supply Voltage vs Supply Current graphs starts at ±5V, or +10V.

    This device was originally targeted at Automotive and Consumer audio.

    Automotive radios generally used a +8V supply, which is why they left the dotted line below ±5V.

    I would not try to run it at +5V. The input voltage range precludes that...and it's non-op at +3.3V.

    There are many better low voltage audio amps, like the LME49721, LMP7732 and others.