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mnoman
06-19-2006, 03:30 AM
do any one know about the Stepper driver IC
reply to it

docel
06-19-2006, 04:09 AM
HI!
Plenty of Ics, but the most famous is the L293/l297/l298/ucn5804

better read this first:
http://www.eio.com/jasstep.htm#translators
us.st.com/stonline/books/pdf/docs/1334.pdf
us.st.com/stonline/books/pdf/docs/1734.pdf
http://home.att.net/~wzmicro/l298.html

devpriya
06-19-2006, 04:23 AM
Do google search and you will get plenty of them

addy
06-19-2006, 12:18 PM
try uln 2803... l293d... l293dne... l298...
but d first two can support a current of only .5 amps...

devpriya
06-20-2006, 04:30 PM
Hey you havent mentioned one thing.... What kind of stepper motor you intend to drive is it a Unipolar or a Bipolar one ? This is a deciding factor in selecting the IC

docel
06-20-2006, 05:19 PM
...these ICs will drive both types, with a little change...

devpriya
06-20-2006, 06:44 PM
Hey Docel that message was for mnoman not for you :) . Actually I wanted to highlight this fact that when you are going for a Unipolar stepper then go ahead with ULN2803 bcoz this will save you lot of money compared to L293 or L297 and L298.

Therefore if cost is a factor then why to drive a unipolar stepper with a L293D

:lol:

Beanie
06-22-2006, 01:48 PM
hi..
i would just like to mention that it would be better if u design your own driver circuit for ur stepper motor.of course,a circuit for a uni-polar motor will be simpler. for this circuit either you can use discrete transistors and diodes or u can go for transistor packeges. but make sure that the transistors u purchase are high power transistors that can supply the rated current of the stepper motor.

for a 4-pole unipolar motor, u ll need 4 darlington pair transistors and four diodes....thats it...not only u can save some money,these transistors are easily available and u ll also find it quite interesting also..

Best of Luck

Beanie
06-22-2006, 01:49 PM
hi..
i would just like to mention that it would be better if u design your own driver circuit for ur stepper motor.of course,a circuit for a uni-polar motor will be simpler. for this circuit either you can use discrete transistors and diodes or u can go for transistor packeges. but make sure that the transistors u purchase are high power transistors that can supply the rated current of the stepper motor.

for a 4-pole unipolar motor, u ll need 4 darlington pair transistors and four diodes....thats it...not only u can save some money,these transistors are easily available and u ll also find it quite interesting also..

Best of Luck

docel
06-22-2006, 07:01 PM
You're right beanie! But most people choose the ICs due to their compact and elegant construction, not to mention ease of use.

Discrete drivers are better always, and may be a little cheaper. But the complexituy of wiring and the heatsinking is a little daunting.

Anyway, the use of stepper motors will reduce, as all the Junk steppers have dissappeared from the footpaths. The nearest is 23 steppers and many wont use them.

addy
06-22-2006, 07:33 PM
i personally feel tat using ic's {if d current ratings permits u} is always a better choice....
there r many additional features in it... like thermal shutdown...
overheating protection... some offer u kind of 'regenerative' breaking too...

they r more compact and reliable than hand soldered discrete components based circiuts...
its just a personal opinion... no offenses...

docel
06-22-2006, 07:47 PM
Thats right addy!
Moreover, soldering so many joints, circuit layout, heatsink are the other cumbersome problems.
The most difficult is to get the right circuit, in the first place. Also, one needs to know the Transistor parameters.