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Astral Driver - Buck, Boost, & Buck-Boost






Those high Vf readings at constant current would be useful for running several diodes in series, thus clamping the current used on all of them. That would be the best way to drive several laser diodes of the same type with a single driver.
 
UPDATE!

The SuperDrive LV has been completed!

This is using a lower powered IC than the original design (the intended IC is out of stock unfortunately)
The price is also reduced from $24.9/pc to $19.9/pc
I'm able to get 3A from 3.9-4.0Vin when boosting

IMG20180606114538.jpg


Test method:
  • Using 1x Li-Ion battery at 4.1Vin (at the end of the test, the battery has 3.9V left)
  • Current measured as a voltage across 0.1Ω resistor
  • Using 10x probe to multiply voltage across 0.1Ω by factor of 10
  • Driver not heatsinked

Boosting:
Iout 1.6A @ 5.5Vf
Super_Drive_LV-1.6_A-5.5_Vf-_4.1_Vin.png


Iout 2A @ 4.5Vf
Super_Drive_LV-2_A-4.5_Vf-_4.1_Vin.png


Iout 2.4A @ 4.8Vf
Super_Drive_LV-2.4_A-4.8_Vf-_4.1_Vin.png


Iout 1.9A @ 6.3Vf (MaxPot, current capped by max Vout)
Super_Drive_LV-_Max_Pot_-1.9_A-6.3_Vf-_4.1_Vin.png


Iout 1.45A @ 5.4Vf (MinPot)
Super_Drive_LV-_Min_Pot_-1.45_A-5.4_Vf-_4.1_Vin.png


Iout 1.7A @ 4.4Vf (MinPot)
Super_Drive_LV-_Min_Pot_-1.7_A-4.4_Vf-_4.1_Vin.png



Bucking:
Iout 1.7A @ 2.6Vf (MinPot)
Super_Drive_LV-_Min_Pot_-1.7_A-2.6_Vf-_4.1_Vin.png
 
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That is a nice boost driver, astralist. Right now I have no use for it, but I might later on if you don't sell out completely. :D
 
Had some time today to set-up my test bench and run one of the new Superdrive LV´s.

Using a fresh NUBM07E & 4.1V in (1x 18650)

@ min Pot = 1.7A

attachment.php


@ max Pot = 2.5A

attachment.php


Either side of these POT settings the driver would fall out of regulation.

Interesting to know anyone else´s results.

Thanks Astralist, will do a few more tests soon :beer:

J :beer:
 

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Thanks for the information, Corey. I was under the impression you could get 3 amps out while boosting at the voltage you applied. How hot did the driver get at 2.5 amps?
 
Astral buck driver? Really? :D.
I know you. I saw in the ebay store.
Astral boost is nice for a BDR-209 my friend is said :drool:
 
jnrpop said:
Had some time today to set-up my test bench and run one of the new Superdrive LV´s.

Using a fresh NUBM07E & 4.1V in (1x 18650)

@ min Pot = 1.7A

attachment.php


@ max Pot = 2.5A

attachment.php


Either side of these POT settings the driver would fall out of regulation.

Interesting to know anyone else´s results.

Thanks Astralist, will do a few more tests soon :beer:

J :beer:
Click to expand...



You have a very good NUBM07E there,
Nearly 5w At just under 2.6a I would usually set them at 4a


I did purchase one of these boost drivers, I think I will use it with a NDB7875 at 2.4a
My plan was a small NDB7675 build at 2.6a for a huge wavelength shift, anyway!
 
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badboybilly said:
You have a very good NUBM07E there,
Nearly 5w At just under 2.6a I would usually set them at 4a
I did purchase one of these boost drivers, I think I will use it with a NDB7875 at 2.4a
My plan was a small NDB7675 build at 2.6a for a huge wavelength shift, anyway!
Click to expand...

Thats 2.5A @ 4.6v BBB, not power output unfortunately as that would be beyond efficient if so :D

Gooood to see you posting though :beer: really enjoyed your work lately!
 
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