St 6208 Dmos Driver For Bipolar Stepper Motor

[gcamlibel]

Is there anyone familiar to ST 6208 DMOS DRIVER FOR BIPOLAR STEPPER MOTOR IC?

I use L297 - L298 for driving steppers. However several times I blown 297 / 298. Some times 5volt supply coused the error sometimes I could not found any reason.

L298 gets very hot and need huge heat sink. I ordered ST 6208 today. I hope they will arrive tomorrov. I will try and give feedback here.

If anyone used this IC please give advice to me.

[ESjaavik]

Uhh! You're going to be disappointed. That's a MCU.

I think what you may look for is L6203 from ST Microelectronics. It's a 4A 42V H-bridge.

Alternatives are LMD18200 and LMD18250. And regardless which of these you use, don't go over the rated voltage!

[gcamlibel]

I agree about rated voltage problem. I used 24volt transformator, With rectifier and capacitor, it gives very near to L298's rated voltage.

However I am sure about L6208. you can download its datasheet from http://www.st.com/stonline/books/pdf/docs/7514.pdf

[ESjaavik]

Hi Gunol, You are quite right, in your last mail.
Read your first mail again. I hope you paid more attention when you wrote your order.

http://www.st.com/stonline/books/pdf/docs/2349.pdf

[drawbar]

I built my stepper driver boards with the ST L6208N chips. I have a fairly small machine made of fiberboard, so I was able to use medium size motors. As long as I set the current limit to less than 1 amp, I haven't needed any heat sink on the chips. If you need more current than this, you will need to use some kind of heat sinking...plenty of extra copper on the PCB at the GND pins and/or a heat sink attached directly on top of the chip.

Hope this helps,
Brian

[gcamlibel]

To ESjaavik:

Thank you for you warning. I ordered L6208 and today they arrived. I will try them tomorrow...

[Jo_Jo]

now i am doing a project. it is driving a stepper motor by L6208.
the datasheet of L6208 said that it can support a current 5.6A, but now, it only support 1A.well the torque is not enough. if i want a higher torque, what should i do.
P.S.:my circuit is samilar with the one supplied by the datasheet.
thank you for your useful help!

[barefoot0]

did you try souldering some copper sheet to the ground pins? I am socket mounting mine and planned to just soulder some 1" squares of copper sheet to the ground pins so they would stick up in the air and then fan cool it.