[UPDATE] V4 BlitzBuck, Available Soon!

Hey everyone. So updated thread: I am finishing work on the next batch of BlitzBuck V4s to be sent out to Clif. Here, there will be two types in two form factors! One low-powered one, at around 400mA-1.1A and the other is the standard power, 1.2A to 3A.

Two form-factors, too! The standard round I have been using, and the now smallest board on the market, at 8.2mm x 11.3mm in rectangular shape.

Here is a picture of the new form-factor BlitzBuck V4!



That's my thumb nail, but it's actually even smaller than my pinky nail! Very small! Great for those tight builds

UPDATE:

So just an update: the green chip on the round V4s that are now for sale should be heatsinked if you notice that the output current increases as the driver warms up.

This is part of the design to keep the board cheap and small. I am working on a different design to remove this effect and keep the same size and pricing.

Re: BlitzBuck V3, Available Soon!

Wow! That's a lot of drivers! Will they be available in currents higher than 1.7A?

Re: BlitzBuck V3, Available Soon!

They are actually pot adjustable with two settings. The first setting is 1.2A to 1.8A, the second setting is 1.67A to 3.1A >

Re: BlitzBuck V3, Available Soon!

Wolfman29 said:

They are actually pot adjustable with two settings. The first setting is 1.2A to 1.8A, the second setting is 1.67A to 3.1A >

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Awesome! Guess this will be able to drive the 9mm at the higher currents then :eg: I'll have to buy a couple when they are available.

How much heat do these put out compared to a boost driver? I've never used a buck driver before.

Re: BlitzBuck V3, Available Soon!

The buck driver is most efficient at higher currents - around 2A or so is my approximation. Typically, buck drivers are more efficient than boost drivers.

However, at its least efficient, it is about 89% efficient. These should be able to run unheatsinked for an unlimited amount of time up to around 2A - not sure about above that, haven't tested it.

I am actually using one of those 9mm 445s at 2.05A in my own build right now using one of these! I am not using the pot - I just took off the pot and set it to exactly 2.05A.

And actually, the formula for calculating the resistor necessary to change out the pot is this:

For low current mode: r = (3636/i)-2050
For high current mode: r = (3636/i)-1175

where i is the desired current and r is the set resistor you replace the pot with. When looking at it so that the inductor is at the top, you'll want to connect the right lead on the pot with the bottom left lead of the set resistor. Or you can jump the top left and the bottom left leads of the pot with the set resistor (the top left and the right leads are shorted anyway).

So yeah. There's some more information for ya'll

Re: BlitzBuck V3, Available Soon!

What's the lowest this can output

Re: BlitzBuck V3, Available Soon!

1.1A I mean, it could output less, but I decided not to make it able to do that in this version.

I mean, I could do a two versions for the V4 edition (probably will be out in a few months), one that could do 100mA to 1.2A and another that could do 1.2A to 3.1A, but I will talk to Clif about that. DTR may be supplying these come fall as well.

Re: BlitzBuck V3, Available Soon!

Wolfman29 said:

1.1A I mean, it could output less, but I decided not to make it able to do that in this version.

I mean, I could do a two versions for the V4 edition (probably will be out in a few months), one that could do 100mA to 1.2A and another that could do 1.2A to 3.1A, but I will talk to Clif about that. DTR may be supplying these come fall as well.

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Sounds good

Re: BlitzBuck V3, Available Soon!

As a buck only, this needs 2 LiIon cells
for a Blue? Looks like a good design.
How much $ ???
HMike

Re: BlitzBuck V3, Available Soon!

Yup. Designed for a blue. Can also do the Mitsubishi reds on a single li-ion. I think they will be approximately $20 or so on Cajunlasers.

Re: BlitzBuck V3, Available Soon!

I like it. $20 ain't bad for a driver
like this.
HMike

Re: BlitzBuck V3, Available Soon!

Glad you think so. I hope he will keep the price down. Don't want him making as much profit as the doctor makes =p

Re: BlitzBuck V3, Available Soon!

Bye Bye Dr. flex drive:na:

Re: BlitzBuck V3, Available Soon!

This isn't a boost drive, so it's not gone yet. But I am working on a BlitzBoost, so then it may be time to say bye to the Dr. =p

Re: BlitzBuck V3, Available Soon!

Wolfman29 said:

This isn't a boost drive, so it's not gone yet. But I am working on a BlitzBoost, so then it may be time to say bye to the Dr. =p

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honestly how cheap will it be if this is 20 bucks ? a flex is 25 for buck boost and has been known to be reliable for a long period of time.

im not doubting you!! just curious :beer:

Re: BlitzBuck V3, Available Soon!

It probably would be no more than $20 either.

But you need two FlexDrives to pump out 2.2A to one of those new 9mm diodes, don't you? That's like $52 right there. With ONE of these, you can do the same. And probably get higher efficiency

Anyway, if I could sell these efficiently, I would probably price them at $15 or $17. But I don't want to have to hold onto them for a few months, selling a couple every other day. I would prefer to sell to reseller.