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LM3445: LM3445 Flyback

Fabrizio utente3
Prodigy 50 points
Part Number: LM3445
Other Parts Discussed in Thread: TPS92314A, LM3447

Hi, my name is Fabrizio and I'm interested in LM3445 as led driver in flyback configuration.

I can't find any calculation tool or excel sheet.

Can you help me? 

  • 0
    TI__Intellectual 2590 points

    Fabrizio,

    We do not have a calculation tool for this device.  However, the datasheet has all equations and a design guide for a buck topology.  Please see section 8.1 Applications Information and 8.2 Typical Application for these equations.  For a flyback you can look at AN-2034 for a 120V design.

    But also, you may want to look at LM3447 which is designed specifically for TRIAC dimmable flyback designs.  That datasheet has complete equations for this topology.  Also, if you don't need dimming support, there are primary side regulation flyback designs available using the TPS92314a device.

    -JP