Thanks for the insights! I was curious about the large coil, I thought it might be a switching driver… I guess we have to speak in terms of power and not stricly current. I will measure again sometime this week with a p42 molicel for which I have the datasheet. Also, aren’t some switching drivers actually more efficient closer to the higher power limits?
So would you approve a simple LED mcpcb swap to properly drive a cslmn1 (w1)? 4A is about right for w1… Does the Vf matter for spms? SFT40 seems to have lower Vf at 4A than W1 (FY and F1) (although djozz test of w1 F1 green seems weird it may had to do with a missed/bad solder job)
By the way, I am curious about how this driver is adjusted, is the voltage factory adjusted to match the higher Vf values of the LED, then current is controlled by the UI? ( I’m just picturing how this aliexpress spms I use is voltage and current adjustable through two small trimpots … I’m not super knowledgeable about how they interact with a load such as diode that forces a voltage drop (Vf) ).
I’ll also try to get a look at the markings on the big chips near the coil for you thefreeman