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Old 9th September 2007, 03:17 PM   #1
mace is offline mace  United States
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Default Inductor DCR ?

Hello all,
I am planning to start a new project soon,and am in the process of working up a BOM.
My question concerns the values of DCR with the required inductors, listed for the design.
Will the difference in DCR effect the outcome of the design?

The listed values are,
L1-2.5mH--.65Ohm
L2-.90mH--.36Ohm
L3-.30mH--.16Ohm
L4-1.25mH--.26Ohm

I would like to use Solen 16g. Perfect lay
Here are the values with DCR
L1-2.5mH--.59Ohm
L2-.90mH--.30Ohm
L3-.30mH--.16Ohm
L4-1.25mH--.25Ohm 14g

Thank you
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Old 9th September 2007, 03:19 PM   #2
mace is offline mace  United States
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Also, would it be possible to go even lower with the DCR without adverse effects?

TIA
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Old 9th September 2007, 04:33 PM   #3
rabbitz is offline rabbitz  Australia
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A good general guide is the inductor should have a DCR that's less than 5% of the driver's Re.

To answer your question, no problems with those values.
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Old 9th September 2007, 10:41 PM   #4
owdi is offline owdi  United States
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You might be able to save a bundle by buying from www.zalytron.com I never bought anything from them, yet, but their prices are awesome.

Choosing an inductor with a different RE will affect the design, but not by much. The values you quoted are so close that any differences will be swamped by variance within the inductor's tolerance limits. The only exception would be a high Q notch filter. These you want to measure to make sure you get right.

Dan
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