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LM5021: Newer Alternative

Darren (FAE)
Expert 5483 points
Part Number: LM5021


Looking for a newer alternative to the LM5021 to upgrade an existing design.
Any recommendations?

I saw the LM34966 that looked attractive...

The use-case is to DC rectify some three-phase AC voltage to around 280Vdc~680Vdc.
Output is 24V at a couple amps.

  • 0
    TI__Guru* 86286 points

    Hello,

    I  am reviewing your inquiry and will get back to you shortly.

    Regards, 

  • +1 in reply to Mike O'
    TI__Guru* 86286 points

    Hello,

    The LM5021 is a fixed frequency PWM controller with programable switching frequency.

    The LM34966 looks like a fixed frequency PWM controller with a programable input UVLO and/or sync input.  Are these features that you need that the LM5021 does not have?  If so I would with the LM34966.

    So you are looking to do a 48 W design which a flyback is perfect for. Is that what you plan on doing?

    Both of these controllers can be used for forwarded converters as well.

    Are you looking for something that is more efficient than the LM5021?

    Regards,

  • 0 in reply to Mike O'
    TI__Guru* 86286 points

    Hello Darren,

    I am just following up.  Did this resolve your issue?  If it did could you please select resolved at the end of thread?

    Regards and Thanks,

    Mike