This driver is 22mm in diameter. It is sized specifically for the new monolithic-head (no-pill) F13 flashlights such as the Ultrafire F13. The retaining ring threads on top of the 7135 cases. The 7135’s on top of the board have a setback such that the cases should clear the ledge inside the head, although the tabs may not. This should ensure good ground contact. I used ~20.5mm for the ledge.
On top of the board is space for the MCU, an SOD-123 package Zener diode, and a 0805 package offtime cap. On the bottom of the board are places for a 0805 voltage divider, a 0805 smoothing cap for Vcc, and a protection diode or 200Ohm resistor. The copper pour in the center is 8mm in diameter, but the exposed copper is only 7.5mm - scrape if you need that little bit extra!
Two special 7135 placements must be considered:
one for the GND trace for the smoothing cap - there are 4 possible choices
one for the GND trace for the top of the board - there are 2 choices and both are on top of the board
If you don’t want to use those placements you must manually bridge GND.
Being the off-time cap it’ll be ok there since you have to remove it to flash anyway. I’m glad it’s there, not that it’s hard to out it between the pin and ground but it’s always nice to have a real pad for it. Looks good, I have a light that needs a 22mm driver, I have a contact board ordered but I’d love to order a set of these for it instead and test it, if your looking for someone send me the files and I’ll order 3.
I did mention that in post #10. There’s plenty of copper there to solder to. I’ll probably leave both pads covered in the next version and remove the mask from at least part of the two big vias. If someone wants to solder to the small 1x1mm surface area they just need to scrape.