Inductor L1 | Synthetos Forum

Started by Chris S on Feb 15, 2019 in TinyG Support. 3 replies, last activity Feb 16, 2019.

Chris S Feb 15, 2019 #

I need to replace a broken inductor, labeled "L1" on the board. I found it on the schematic here:

https://github.com/synthetos/TinyG/blob/master/hardware/v8schematics/v8h/tinyGv8h%20-%20schematic%20page2.pdf

and it's called out as 150 uH. That's a good start but I need a little more information to make sure I buy the right part. Current rating, resistance, inductance, etc. This is what I've narrowed it down to so far:

https://www.digikey.com/products/en/inductors-coils-chokes/fixed-inductors/71?k=151&k=&pkeyword=151&sv=0&pv2087=u150%C2%B5H&sf=1&FV=1140003%2C2dc1cc1%2C17700068%2C17700503%2C17700104%2C17700007%2C1770005e%2C1f140000%2Cffe00047%2C1400009&quantity=&ColumnSort=0&page=1&pageSize=25

Anybody seen a BOM for the TinyG? That should probably have what I need.

Thanks.

cmcgrath5035Staff Feb 15, 2019 #

That is a Ripple Filter circuit

Part ID is on Schematic Murata 1255AY-150+P3
https://www.digikey.com/product-detail/en/murata-electronics-north-america/1255AY-150M=P3/490-10802-1-ND/5271544

See reference design here
http://www.ti.com/lit/ds/symlink/lm25011.pdf

It will be a challenge to remove the old unit from pwb, the ground plane layer beneath is a great heatsink

Chris S Feb 15, 2019 #

Thanks mate, you're a legend.

We have ovens and pre-heaters and hot air rework stations here that will probably be used for this. More importantly we have people here who know how and when to use all that stuff, they'll decide the right tools for the job.

Thanks again.

cmcgrath5035Staff Feb 16, 2019 #

Lucky!
Hope it works out for you