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Replacement for RLB9012 ...
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Replacement for RLB9012 ...

by milosgenije on Fri Sep 27, 2013 5:51 pm

Which inductor could be replacement for the one from RLB9012 ? In my country there is no such series.
Can it be any of the PWR inductors which meet 10uH, IDC 1A MAX condition? What about SRF (MHz) min and RDC (ohms) max ? Please, help me.
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Re: Replacement for RLB9012 ...

by ifrpilot999 on Sat Sep 28, 2013 10:35 am

The datasheet for the LT1302 boost converter specifies the possible inductor choices and make some recommendations:

"Inductors used with the LT1302 must fulfill two requirements. First, the inductor must be able to handle current of 2.5A to 3A without runaway saturation. Rod or drum core units usually saturate gradually and it is acceptable to exceed manufacturers’ published saturation currents by 20% or so. Second, it should have low DCR, under 0.05Ω so that copper loss is kept low. Inductance value is not critical. Generally, for low voltage inputs down to 2V, a 10µH inductor is recommended (such as Coilcraft DO3316-103). For inputs above 4V to 5V use a 22µH unit (such as Coilcraft DO3316-223). Switching frequency can reach up to 400kHz so the core material should be able to handle high frequency without loss. Ferrite or molypermalloy cores are a better choice than powdered iron. If EMI is a concern a toroidal inductor is suggested, such as Coiltronics CTX20-4."

Digikey also recommends a possible substitute for the RLB9012: M8616-ND. (Bourns part # 6000-100K-RC)

Hope this helps.

Dave.

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Re: Replacement for RLB9012 ...

by milosgenije on Tue Oct 01, 2013 11:28 am

Thank you so much Dave.
You helped me a lot.
Regards, Milos :-)
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