Texas_Ace wrote:

I doubt we will see widspread use of NTC’s until we move to a more modern MCU with more pins. Like the 1616 or 1617. When we move to those, then lots of doors open.

Also, we are out of space on the tiny25 for anything else anyways, so it sure won’t be added to that.

a NTC could be added to one of the programming pads for sure if vias gets added or drilled
adding a ground pad for it as well should be no problem next to the inductor

So let’s say we build a XHP35 triple in a S2+ shorty using these drivers. 6A at 12V gives us.. 3× 2A per XHP35 so that would be 3× 2200 lumens for around 6600 lumens. Not too shabby

For about half a second before your LEDs reach 200 degrees and start melting.

What I’m really looking forward to is efficiency on the medium modes combined with a good UI. A quad 9050 219C can do around 800 led lumen at 6W, if the driver is efficient enough I think something like 600 lumen OTF for 2 hours should be easily doable with a single 18650. That combined with bistro and the option of doing 30W bursts on any battery level, all in a very compact light, would be amazing.
Do we have any estimate for how efficient it will be at around 10W ?

At middle modes likely about 90% or a bit more with the bigger footprint input capacitors

Lexel wrote:

17mm BLF 1S 6-12V Boost driver is in progress
This is a very powerful one, not cheap at all, but we target 8A for 6V LEDs, XHP35 can be as hard driven as desired

Though any body that has space for 17mm driver only likely can’t take any more than 20W for peak power or 10W for continuous power.

Convoy L2 can take 30W continous

Of course 20mm, 22mm will be availiable as well
The GT buck 2S/4S will be down to 28mm with more expensive 8×8mm inductor availiable

Quote:

doubleone44 said So let’s say we build a XHP35 triple in a S2+ shorty using these drivers.

Even with a 3A max @ 12V, that’s still around 1500lm each for ~4500lm turbo.

I see a upgrade in the future for my E2L.

Also, the idea of a EE X6 or a C8 w/ xhp35 would be fun.

Hmmm, X5 pocket thrower????

Lots of possibilities w/ this 17mm boost driver.

Blazer296 wrote:

Quote:

doubleone44 said So let’s say we build a XHP35 triple in a S2+ shorty using these drivers.

Even with a 3A max @ 12V, that's still around 1500lm each for ~4500lm turbo. I see a upgrade in the future for my E2L. Also, the idea of a EE X6 or a C8 w/ xhp35 would be fun. Hmmm, X5 pocket thrower???? Lots of possibilities w/ this 17mm boost driver.

You can get similar numbers with 3V LEDs, for ex. 3x Luxeon V would do ~3x1500lm at 4A each, and with good regulation time becuase of low Vf (~3.15V)

Texas_Ace wrote:

I doubt we will see widspread use of NTC’s until we move to a more modern MCU with more pins. Like the 1616 or 1617. When we move to those, then lots of doors open.

Also, we are out of space on the tiny25 for anything else anyways, so it sure won’t be added to that.

Attiny85 with Narsil switch pad added

also all 3 pads unused now availiable,
one shares the voltage divider, which is in Narsil the indicator LED pad

Will you be releasing schematics and parts list? It looks like the ATtiny1634 will fit nicely.

Schoki wrote:

I will release everything when it’s tested.

Which is part of why I will be working on and testing yours (plus the latest design is better).

Texas_Ace wrote:

Schoki wrote:

I will release everything when it’s tested.

Which is part of why I will be working on and testing yours (plus the latest design is better).

Texas_Ace wrote:

Schoki wrote:

I will release everything when it’s tested.

Which is part of why I will be working on and testing yours (plus the latest design is better).

yeah Shoki is working with Eagle and I am with Diptrace, but final design should be technically identical

Lexel wrote:

Texas_Ace wrote:

Schoki wrote:

I will release everything when it’s tested.

Which is part of why I will be working on and testing yours (plus the latest design is better).

yeah Shoki is working with Eagle and I am with Diptrace, but final design should be technically identical

Then why bother messing with the design? Just use Schoki’s design once it is released.

Just in case and to cross-check for any errors creeping in?

Texas_Ace wrote:

Lexel wrote:

Texas_Ace wrote:

Schoki wrote:

I will release everything when it’s tested.

Which is part of why I will be working on and testing yours (plus the latest design is better).

yeah Shoki is working with Eagle and I am with Diptrace, but final design should be technically identical

Then why bother messing with the design? Just use Schoki’s design once it is released.

basically why I was not happy with poor cooling of the boost chip with no viases to the other layers and the option to put more boards on a Seeed 10×10 board in production

and I got no Eagle, no advanced license for it and I think getting used to a 2. program is too much

did a 24-30mm variant

OPA parts got closer together
12mm inductor to save money with better performance

Patiently waiting for the single cell XHP50.2 goodness. Any tests!?

contactcr wrote:

Patiently waiting for the single cell XHP50.2 goodness. Any tests!?

Still waiting for parts and PCB’s to arrive.

I hadn’t seen it mentioned but would it be possible to use 1 or 2S input to output 12v in lights with extension tubes?

Will this driver be able to be programmed to supply 12v 700ma and lower currents?

When the 17mm boost driver is ready, where can it be purchased with firmware already installed? (ready to use)

Noob type question I’m sure… I’ve not previously dealt with newly released BLF designed drivers.

beam0 wrote:

When the 17mm boost driver is ready, where can it be purchased with firmware already installed? (ready to use)