How to calculate current in hashed shape or is hashed shape will carry 5A current in flex PCB
kabaleeswaran , 03-12-2024, 12:01 PM
I am working on flex pcb, still I need some advice for flex pcb, in my design has LED and drivers, so current carrying for drivers should be 5A. The board has 4 layer and Hashed shape to add. so how it will carry 5A or how to calculate current carrying details in hashed area. board thickness is 0.5mm and 1 oz copper used. Kindly suggest any one.
QDrives , 03-12-2024, 03:25 PM
If I take a look at PCB toolkit... that is wide.
Robert Feranec , 03-13-2024, 10:57 AM
I would probably added sum of the track's width over the flex width and used what @QDrives suggested. it is only approximate calculation but the current will not be probably distributed equally anyway.
kabaleeswaran , 03-14-2024, 03:53 PM
above image only for solid plane. but i am using cross hatching plane for flex PCB due to flexibility. but i check with fab house 2A able to achieve in 4 layer. board dimension is 18x600mm. 2A can able to achieve in power right? Do you have any idea. if any guideline pls share it
QDrives , 03-14-2024, 04:38 PM
Well, if you use the hatching pattern, the current capability drops a bit.If you want to be sure, you have to ask the fabricator or make a test 'board' and test it yourself.I do not know how accurate the current carrying capability of flex boards is. Some of the original measurements were done in the 60s.It also depends on the cooling (airflow) in your application.
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