DPSS driver developemnt

Quote:

---

Originally Posted by -bart-

My design philosophy of such a supply:
At these powers I would suggest a combined psu of 3,3 volts for the diode and a second voltage for the tecs.
The shg-tec should have an H-bridge for heatig/cooling. The tec should be pwm driven for best efficiency.
The pid temp controllers for the tecs should be implemented in a pic with autotune functionality.
A feed forward of the modulation input to the tecs would be ideal to achieve proper modulation response.

A balanced input matched to the ilda output spec.

---

Sounds familiar.. a little mod to the LD-driver input (balanced input) and a mod on the output stage to accommodate the 3.3V supply voltage. Feed forward pid is implemented, auto tune algorithm is implemented (still needs debugging). 2 independent full bridge TEC channels (12V/±3A) PWM @ 250kHz filtered to give no more than 200mV of ripple. Do you think that 2 x 30W heating/cooling is sufficient?

would it be exaggerating if i asked for three tec controllers, all H bridge?

one to control pump diode temp (and thus pump wavelength), one to control yvo4 temp and one to control ktp temp??? *retardo

Quote:

---

Originally Posted by LaNeK779

would it be exaggerating if i asked for three tec controllers, all H bridge?

one to control pump diode temp (and thus pump wavelength), one to control yvo4 temp and one to control ktp temp??? *retardo

---

If I'm correct, this driver is really aimed at the 1-5Watt range, cooling the yvo, is really a 5++ watt feature.
Besides that, the driver is aimed to be a used with standard oem heads that afaik don't cool the lasing medium independently.

i guess you are right bart... it is just that my secret hope for a PL developed green head always gets in the way and "clouds my judgment" *retardo*retardo*retardo

thanks bart that gives me some insight of what the driver should be :)