New JLasers JLB5A 4.2v Boost Driver 2-5 A (15mm, 17mm, 20mm, 22mm)

[loreadarkshade]

Just finished the prototype of this new driver me and @Darktron have been working on.

It uses TPS61088 boost converter IC from Texas Instruments. There is an adjustable 10-turn pot for fine 2-5.5A adjustment
It is constant current mode, using shunt resistor and a precision op-amp for feedback into the IC.

Contact me for price quote, these have not been published on my website yet, literally got them in the mail today

 

[RedCowboy]

Very nice, those are fantastic pots.
You could sell those on ebay and bring new customers to your site.

 

[paul1598419]

Just finished the prototype of this new driver me and @Darktron have been working on.

It uses TPS61088 boost converter IC from Texas Instruments. There is an adjustable 10-turn pot for fine 2-5.5A adjustment
It is constant current mode, using shunt resistor and a precision op-amp for feedback into the IC.

Contact me for price quote, these have not been published on my website yet, literally got them in the mail today

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Seems like a lot of requirement to ask of a single Li-ion battery. Looking forward to your analysis of this driver when you get them ready for sale.

 

[loreadarkshade]

Draws about 8 amps at full 5A output so its not too bad but you're right, you better have good batteries to run this thing!

 

[paul1598419]

Draws about 8 amps at full 5A output so its not too bad but you're right, you better have good batteries to run this thing!

I thought as much. Better have more than the best 18650.

 

[loreadarkshade]

I thought as much. Better have more than the best 18650.

Well, it does have current adjustment from 2A to 5.5A, just don't crank it all the way up hah!
I don't know many 18650 hosts that would have a diode requiring 5.5 amps continuous anyways

Keep in mind I have this driver in 15mm, 17mm, 20mm and 22mm form factor, so if you really want to make this thing shine, use some 21700 batteries with the newest generation of diodes at full power in a larger host

 

[paul1598419]

Well, it does have current adjustment from 2A to 5.5A, just don't crank it all the way up hah!
I don't know many 18650 hosts that would have a diode requiring 5.5 amps continuous anyways

Keep in mind I have this driver in 15mm, 17mm, 20mm and 22mm form factor, so if you really want to make this thing shine, use some 21700 batteries with the newest generation of diodes at full power in a larger host

Sinner made some that took 18650s and had enough heat sinking to last. His all copper Cyprus comes to mind. I have a Cyprus II with a 1 watt 635 nm diode in it. Kind of a waste for that host.

 

[paulalfonzondo351]

Just finished the prototype of this new driver me and @Darktron have been working on.

It uses TPS61088 boost converter IC from Texas Instruments. There is an adjustable 10-turn pot for fine 2-5.5A adjustment
It is constant current mode, using shunt resistor and a precision op-amp for feedback into the IC.

Contact me for price quote, these have not been published on my website yet, literally got them in the mail today

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Looks really nice and clean...any idea on price and availability? Thanks so much!

 

[loreadarkshade]

Looks really nice and clean...any idea on price and availability? Thanks so much!

Available now in 22mm, the other sizes will come later as follows: 17mm, 20mm, 15mm
Price will be around 20 USD

 

[Darktron]

I've been a bit inactive lately I'm so glad you got this to work from my failed attamps lol. You forgot to mention this driver is very efficient and barely heats up at these current levels. On the 18650 8A draw is totally acceptable you can get 3000‐3500mAh batteries capable of 15‐25A host/heatsink size would be the limiting factor here but newer diodes are more efficient (less wasted heat) also can always upsize the host/heatsink and use a 18650 in a 21700 host.