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3.7v Boost Laser Driver Circuit - 1.2A (445nm 450nm 520nm)

Joined
Dec 14, 2020
Messages
72
Points
8
Here is a laser driver I have reverse engineered. Works great with my 1.6W nichia laser diodes.

Not sure if these are constant current however, although the current seems stable when driving a diode, I'm not sure if that's due to the driver regulating or due to the diode having good heatsinking.

Ebay listing:

Enjoy!
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Last edited:



Giannis_TDM

Well-known member
Joined
Apr 27, 2019
Messages
663
Points
93
Here is a laser driver I have reverse engineered. Works great with my 1.6W nichia laser diodes.

Not sure if these are constant current however, although the current seems stable when driving a diode, I'm not sure if that's due to the driver regulating or due to the diode having good heatsinking.

Ebay listing:

Enjoy!

View attachment 73711View attachment 73712
That driver is a constant voltage ic with overcurrent protection, aka they are using the overcurrent protection as a pseudo CC test point, I'd expect the current ripple on the output to be massive though since that OC is on the input side, hence no shunt on the output node, just the divider for CV.
 




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