Supernew high-side diode and TEC smart driver :)

[Bbe]

he-he, do you think it would be a popular device here? I think you and a few other guys would be interested in this driver

[sbk]

I'm pretty sure yes, as the driver offer is currently limited and most of the time they are only "simple" drivers, without TEC or other sophisticated features like wide supply range (without huge dissipation), uC control or so...

[Bbe]

OK, I wait 10 followers in this thread and then arrange the vote. Need to define the technical characteristics of the future driver

bump. technical characteristics like this:

1. Input voltage 12/24/36/48V
2. 1/2/4 diode channels
3. 1/2 TEC channels
4. 1/2/3/4A diode current per channel
5. 2/4/6/8A TEC current per channel
6. Cooling/cooling+heating (H bridge)
6. Protection options - overheating/overpolarity/overvoltage
7. etc...etc...etc

[tribble]

Why doesn't anyone make a 3-channel driver? If you're going to do a single-mode projector, you need R, G, and B... that's three. Even if you run multiple diodes per wavelength on the same channel, you still typically have three channels.

[Bbe]

3-channel with dc-dc and TEC? Typically, people are looking for low cost drivers for single-mode RGB projectors. For 3-4W RGB design, 4-channel driver is very actual (1ch/blue, 1ch/green, 2ch/red)

[sbk]

Why doesn't anyone make a 3-channel driver? If you're going to do a single-mode projector, you need R, G, and B... that's three. Even if you run multiple diodes per wavelength on the same channel, you still typically have three channels.

Not really flexible to do so, I prefer to have the possibility to easily stack several drivers if I need to drive several laser modules.

[sbk]

1. Ideally it would be 24V, so we could power an entire projector with one big 24V PSU, plus a little one -24V for the scanners.
2. 1 channel, as with 24V you can power a lot of diodes in series
3. 1 TEC channel
4. 2A is sufficient for all current diodes
5. 4A or 6A for the TEC, to quickly react to the diodes temperature change
6. H-bridge is great, so it will heat the module to optimal temp if external temp is low
7. Overheat / Modulation overvoltage + inversion / Power overvoltage + inversion / ESD protection (clamp relay on diodes when not powered)
8. Soft start
9. Modulation frequency min 50 kHz
10. Status LED (TEC cooling or heating, power input, etc)

That would be a good driver

OK, I wait 10 followers in this thread and then arrange the vote. Need to define the technical characteristics of the future driver

bump. technical characteristics like this:

1. Input voltage 12/24/36/48V
2. 1/2/4 diode channels
3. 1/2 TEC channels
4. 1/2/3/4A diode current per channel
5. 2/4/6/8A TEC current per channel
6. Cooling/cooling+heating (H bridge)
6. Protection options - overheating/overpolarity/overvoltage
7. etc...etc...etc

[Bbe]

I think that the scanner PSU will not be happy about it....


Regular scanner PSU is not able to bear the additional load (high power diodes, TEC's...)

1. Ideally it would be 24V, so we could power an entire projector with one big 24V PSU, plus a little one -24V for the scanners.

This option will significantly increase the driver cost

6. H-bridge is great, so it will heat the module to optimal temp if external temp is low

There are no problems

7. Overheat / Modulation overvoltage + inversion / Power overvoltage + inversion / ESD protection (clamp relay on diodes when not powered)

Start delay + soft start

8. Soft start

Already have a simple series

9. Modulation frequency min 50 kHz
10. Status LED (TEC cooling or heating, power input, etc)

[sbk]

Well I'm speaking about not using the usual PSU you receive with low cost chinese scanners, but rather a good powerful one +24V, 200-300W, enough for powerful scanners + a few watts of diode power.

For the H-bridge ok not mandatory for a diode module, maybe is it possible to add it as optional?

[Bbe]

H-bridge option implies another MCU and circuit design that result in increased cost...

My old driver, which I did for one of my projects has a 24 volt dc-dc converter. Based on this design, I can make 5A driver with input DC voltage up to 60V, if that makes any sense.