Re: 3 mode driver for 445nm, one Li-ion
Problem solved.
Internal resistance of DMM that I used was high and voltage drop on DMM was about 1.5V that resulted low voltage on driver (under 2.5V).
I recharged batteries and now I'm using another DMM that makes 0.5V voltage drop and current is about 1550mA for high mode. Without DMM current must be noticeably lower than 1.5A.
This driver looks like very efficient driver for its price.
Only thing that worried me was "voltage spikes". And I solved this problem by soldering one tantal cap (330uF) and two SMD caps (3.3 and 10uF) directly on diode. Now I can turn on laser without fear
And one question.
How can I accurately measure input current?
EDIT:
@SHIN
Thanks, I'll post review soon.
No, I don't have LPM and I really want to see 1000mW+ output power on LPM
EDIT2:
Another DMM that has lower internal resistance seems like defective.
Sometimes it shows 1.5A input current and sometimes shows 2A.
Input current of 1.5A looks too good to be true, It's most likely 2A.
But even if it's 2A there is 0.5V voltage drop on DMM. Without DMM current must be lower than 2A. And it sound good for its price.
I'm still looking for accurate method to measure input current..