The big TEC driver thread!

[Badpip]

Well I'm in for ditchin V1 due to the MCU not being able to output a PWM @ 100kHz requiring to much PCB realestate for filtering. The V2 with around 78kHz is better but still not quit optimal (=>100kHz would be best).

Why not ditch the Atmel MCU and go for a PIC then?

These things will output >200kHz with no problems.

PIC18F25K22 Datasheet

Have a look at page 186.

/Thomas

[Solarfire]

Why not ditch the Atmel MCU and go for a PIC then?

These things will output >200kHz with no problems.

PIC18F25K22 Datasheet

Have a look at page 186.

/Thomas

Thanks for the heads up on the PIC's there, that looks very promising and this would substantially decrease PCB filter real-estate being able to run a PWM @ => 250kHz. I just downloaded the MPLAB X IDE beta6.00.01 and that looks pretty comfortable too. The last time I looked @ PIC programming there was a shit load of assembler programming involved. Looks like microchip did a little bit of homework there, nice IDE. Yeah...I think I’m gonna do a PIC version!

I just finished the LD-Driver, which will also find its way on to this TEC PCB. The driver is doing 1.14A @ 24V on a 20Ω load (4 x 445nm ≈ 19Ω) and 4.6A @ 24V on 2Ω, stable up to 300kHz with a load of 2-20Ω. Precision RR OP-Amps used in mixed build, SMD and hole-thru on a single layer PCB of 30 x 30mm (see layout). I just ordered a small run of 10 for testing, should be here next week.

[allthatwhichis]

x5!!!

[Solarfire]

Project progress "Solarfire-n-Ice LD/TEC-Driver"

Solarfire-n-Ice LD-Driver and TEC-Driver merging.

Movin right along now...

[taggalucci]

.......Sweet

[dave]

I have these boards arriving tomorrow. Only a couple of prototype boards at this stage. The design is going to change a fair bit, but these will get me out of trouble for a couple of things I'm working on

Pretty much a die4chill and 2 modified die4drives to allow higher current, and higher voltage. Lets hope they work

[Solarfire]

It's time for some code..

85 x 60 mm board

[edison]

Solarfire, could you say how much channels your board has?

Thanks!!

I really like the 3 channel from Badpip:

http://www.photonlexicon.com/forums/showthread.php/10749-New-High-side-Diode-driver-and-TEC-Driver

[edison]

I also like the singledriver from solarfire. Both would fit nicely with my Kits. Might be smart to offer them at the kits groupbuy

[Solarfire]

Got a little stack of the prototype LD-Driver PCBs today, will be populated shortly and I’m PICin at the code for the PIC version of the TEC-Driver.