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Hello All,
I just finished the design of my first PCB. I make lamps in my spare time and have been using a small aluminium LED PCB and a USB cable with a touch dimmer from Aliexpress. But for the next iteration I'm integrating the touch sensitivity into the design, so I designed this PCB that integrates both the LEDs and touch IC (the touch functionality will be wired to a part of the lamps frame).
Other than that I copied the design of the LED PCB i currently use which has 3 x 12 ohm resistors in parallel for total of 4 ohm and better dissipation. These are then connected to 6 LED's also in parallel.
To avoid soldering during assembly I added some SMD terminals. Also there are holes for routing cables as well as screw holes.
I suppose my main question is, can anyone spot any obvious issues? Any comments / input / questions are much appreciated!
Best,
Olav
I just finished the design of my first PCB. I make lamps in my spare time and have been using a small aluminium LED PCB and a USB cable with a touch dimmer from Aliexpress. But for the next iteration I'm integrating the touch sensitivity into the design, so I designed this PCB that integrates both the LEDs and touch IC (the touch functionality will be wired to a part of the lamps frame).
- The board is single sided because I plan to make it an aluminium board.
- The board is 32mm across
- The main IC is a copy of SGL8022W - I just choose this one because it's in stock at JLCPCB. I couldn't find an english version of the data sheet online but here is the Chinese one: https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2202171630_Sam-wing-8022W_C2974602.pdf.
- I'm going for their example schematic 1.
- From translating the document the option pins should be left floating for 1 and pulled to ground for 0. I'm going for mode three so I connected option 2 to ground.
- Since I will be wiring the touch directly to the frame I change the sensitivity capacitor (C3 in my schematic) to 33nF per the data sheet
Other than that I copied the design of the LED PCB i currently use which has 3 x 12 ohm resistors in parallel for total of 4 ohm and better dissipation. These are then connected to 6 LED's also in parallel.
To avoid soldering during assembly I added some SMD terminals. Also there are holes for routing cables as well as screw holes.
I suppose my main question is, can anyone spot any obvious issues? Any comments / input / questions are much appreciated!
Best,
Olav
