Code now public! BLF A6 FET+7135 Light. Short 18350 tubes and Unanodized Lights Available

[dthoang]

@ToyKeeper

@dthoang

The 3D works fine except for the stutter when switching from Turbo to moon.

That turbo-to-moon flash is something many of the BLF-based drivers have, and nobody seems to have found a definitive reason for it. However, I’ve heard that some have added an extra resistor to absorb the flash. My theory is that the C1 capacitor may be full when the light shuts off and it discharges all at once when turned back on again… but only if it was off for a very short time, and only if the light was using a very high level before. If it’s off for longer, C1 can discharge before turning on again, and if it turns on to a higher level, the flash is invisible.

I did some testing on this, and I found that the flash happens no matter what the firmware does. Even with both power channels turned off and the OTC discharged, it still happens. It’s an unsolved hardware quirk.

I have built many drivers described here and none exhibited the turbo-to-moon flash. My guess is in the component selection. I used NXP PSMN6R5-25YLC supplied by Mouser. This has double the RDSon compared to the PSMN3R0-30YL used by Manker. But the PSMN6R5-25YLC has much lower gate charge characteristics. I selected it to save money, but it looks like it works better.

When I have time I will swap the FETs in the Manker driver and report on the results.