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Parallel LM3410

Andrew Dai1

Prodigy 30 points

Other Parts Discussed in Thread: LM3410

Has anyone ever tried to parallel the LM3410? I would like to use 2 in parallel to get higher output current. Are there any tips or suggestions for getting the two drivers to share the load somewhat equally?

over 10 years ago

0 Victor Chen_HK over 10 years ago

TI__Expert 5130 points

Hi Andrew,

It is not a good idea to parallel two devices as they may switch on/off at slightly different times and the result will be a huge amount of errant switching. Would you please let me know the spec of your application? Using a controller may be an good idea to get higher output current.

Best regards,

Victor

0 Andrew Dai1 over 10 years ago in reply to Victor Chen_HK

Prodigy 30 points

I have 3-4V input, and I want 19V output at 1A. Are there other controllers you can recommend?

0 Victor Chen_HK over 10 years ago in reply to Andrew Dai1

TI__Expert 5130 points

Actually one LM3410 can fulfill your requirement. You may use the schematic on LM3410 data sheet pg.33 as a reference.

Best regards,

Victor

0841.LM3410.pdf

0 Andrew Dai1 over 10 years ago in reply to Victor Chen_HK

Prodigy 30 points

But the internal switch can only handle 3A. To boost from 3V to 18V out, you need the internal switch to handle up to 6A to get 1A out.