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Difference between LM5109A & LM5109B ?

Frank Yin
Prodigy 20 points
Other Parts Discussed in Thread: LM5109B, LM5109A

Hi, does anyone know the difference between LM5109A & LM5109B?  Thanks a lot.

I compared the datasheet and can't find any difference....

  • 0
    Mastermind 7395 points

    mmm

    Funny that you point that out and you seem to be correct. Usually the 510xA devices are for more current than the 510xB devices, and that is why the B devices are cheaper. I don't know what happened with the 5109A and 5109B, wether this is a datasheet mistake or what, the fact is that the 5109B IS cheaper

  • 0 in reply to Avi Chami1
    TI__Prodigy 310 points

    The difference between LM5109A and LM5109B is extremely subtle.   The HO output of LM5109A could be undefined if VCC=0 and HB-HS>8V.  This is an odd bias condition and is difficult to achieve.  LM5109B can hold HO off under this situation.