Fixing VIN Trace Errors

norandin

norandin

the two 4 pin jst plugs that are connected to the external LED board can draw around 100 W at 12V (combined accross the 2 plugs) on some occasion. is this a problem?

flux

Yes—100 W at 12 V means about 8.3 A through the board, so the LED power connectors, copper, terminal, wiring, and protection all need to be checked. I’ll inspect how VIN/GND are distributed across J3/J4 and compare the current PCB against that load.
Created a project doc

12 V LED Power Path Review

View Document
The two external LED boards can draw approximately 100 W combined from the 12 V VIN rail. $$I = \frac{P}{V} = \frac{100,W}{12,V} = 8.33,A...

flux

Yes—100 W at 12 V is 8.3 A, and the current board is not safely designed for that continuously. J3/J4 can be marginally acceptable when evenly sharing current across both power and both ground contacts, but the confirmed 2 mm, 1 oz common VIN trace is the main bottleneck and needs broad copper pours plus branch/main protection.
Full findings: 12 V LED Power Path Review. No PCB changes were made.
Redesign power path
Fix high-current issue
Explain copper sizing
Choose safer connectors
Add protection plan
GND
J5 P1 - C8 P2
R3 P2 - J5 P2
R3 P2 - J5 P2
U1 VIN - C1 P1
U4 Y - R3 P1
J4
R3
Resistance
33Ω
J5
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P2 Lamp

P2 Lamp thumbnail
LED controller

Properties

Properties describe core aspects of the project.

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