LM3492: LM3492 as SEPIC

Martin Wunderlich

Part Number: LM3492

Hi,

is the LM3492 suitable for a SEPIC design? The datasheet mentions the projected-on-time feature. Would that interfere with the SEPIC topology?

By now I have used the LM3492 in the normal Boost configuration and it works fine. But now the input voltage requirements have changes from 12 V to 18...32 V (with ca. 22 V LED voltage).

If the LM3492 is not a good choice for that design, could you recommend some other part?

Thanks & best regards,

Martin

over 6 years ago

0 Irwin Nederbragt over 6 years ago

TI__Mastermind 28655 points

Hello Martin,

I take it you are using two channels with this design?

Here is a previous post regarding this: e2e.ti.com/.../2244568

Regards,

0 Martin Wunderlich over 5 years ago in reply to Irwin Nederbragt

Prodigy 150 points

Hi Irwin,

thanks for your reply! Yes, I'm currently using two channels with 7 LEDs each and 65 mA per string.

The other post suggests that a SEPIC setup should be possible, so I think I'm giving it a try. Any objection?

Best regards,

Martin

0 Irwin Nederbragt over 5 years ago in reply to Martin Wunderlich

TI__Mastermind 28655 points

Hello Martin,

Based on the previous post it should work.

Regards,

0 Martin Wunderlich over 5 years ago in reply to Irwin Nederbragt

Prodigy 150 points

Hi Irwin,

thanks again!

Best regards,

Martin

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LM3492: LM3492 as SEPIC