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Thanks, dude!

hey dude, how do you embed a youtube video in your post?

Yep, iohutom, from Singapore :-)

Hi Just completed. Everything new except FAP Laser (thousands of hours left if properly used) 40 Watts FAP Solid State Complete Laser System - Using orinary PC Case - PC Power supply to provide 5V, 12V to fans and microprocessor - ATmega 168 Microprocessor for monitoring temperatures...

Re: 445 A140 Round 3! $37.50 Shipped! Hi How much to ship to Singapore? I've not been to the forum for a while.. these fix Axiz modules?

anyone?

Hi Mike I think the sense pin you mentioned is the voltage sense; there are 2 sense + and sense -. There is no current control for this module; looks like I just blew another $79 :(

Hi Mike I read thru the data sheet. There is no mention about Current Control using an external OP amp.... There are stuffs like external resistor to fix output voltage, calculation of input and output capacitors, TurboTrans feature, inhibit pin, low voltage lock .... etc .... but no mention...

Thanks for all that information!! I think I have a problem.. I an using a TI PTH08T250W to regulate the voltage from a PC power supply 12V to around 2.2V output... With 2.2V, I can't even turn on the MOSFET whether logic level or not.... this is getting tough... HELP!!

Thanks, HIMNL9. I have no idea what MOSFET to get. With your experience, would you recommend something to do 40 to 49 amps?

Hi I need to build a constant current laser diode driver. I have all the logic circuit designed to monitor temperature, TEC cooling control and turn off/on the laser diode power input but I am still lacking a high power constant current driver. In another post...

Thanks. I am also googling to find out more..

Thanks, bluefan. When I read that the PTH08T250W supplies at 50A, I take it as it is a constant current driver at 50A. If not, then how is the current being sourced? If that is the case, I'll need a separate current regulator.. do you have a circuit to share or point me to another intergrated...

Thanks for the information. My diode bar is encased in a metal box with TEC cooling. The unit is made by Coherent. I've designed a ATMEGA microprocessor circuit to control and monitor the temperature. The temperature will be displayed on a HD44780 LCD 40x4. So, the power to the laser comes...

I think you need a custom current driver...

I bought a 40 watts laser diode; seller told me it is using 2.2v at 49 amps. 2.2 x 49 amps is defintely more than 40 watts. does this make sense? The last thing I want is to blow the laser diode because it is over-driven! So, a 40 watts laser diode can waste more than 50% power?

The specs: http://focus.ti.com/lit/ds/symlink/pth08t250w.pdf

Thanks for the advise, Hemlock! I searched the web and found some specs that are very useful. PTH08T250W has an input range of 4.5 to 14 V, if I use 12V rails from an PC power supply, will I able to get 40 amps from the module? Also, the PTH08T250W is rated 50 amps, can I reduce it to 40 amps...

Want to buy a good, wokring unit power supply for laser diode Input: 240 AC Output: around 1.8 to 2.2 V at 40-45 Amps DC Please PM me. Thanks!