June 2nd, 2008, 13:54
June 5th, 2008, 10:05
June 6th, 2008, 10:43
June 6th, 2008, 14:32
lunchboxes wrote:I damaged one inductor on the PCB of Seagate ST3320620AS
The inductor is written as 3R3
I want to replace that SMD
But I am not sure that if I can use TDK VLCF5020T-3R3N1R6 to replace it
Here is the data sheet of TDK power inductor
http://www.tdk.de/company/inductors_coi ... cf5020.pdf
and here is the pix of my seagate harddisk pcb
The damaged part is inside the red circle
http://us.f6.yahoofs.com/hkblog/rZbsucqeBRmvtMy0i78iu44Dmg--_1/blog/20080531113638971.jpg.jpg?ib_____DWYHCLZiH
Any expert can help me out? Thanks
June 6th, 2008, 17:48
June 7th, 2008, 0:44
pepe wrote:Hi Amarbir,
These things are parts of DC-DC converters running at some hundred KHz. At this frequency these have some reasonable impedance that your short won't have -> it will overload the driving circuit.
pepe
June 7th, 2008, 3:06
June 10th, 2008, 14:47
BlackST wrote:Amarbir, they would have not fitted an inductor if could be shorted... It's part of the circuit. A smps with one or more coils short in the primary typically break the switching or trigger the protection (basic engineering of smps or dc-dc converter circuits!) sorry could not resist posting, despite I quit definitively dr and related stuff - at last! . Regards
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