question about ISL1208

gas51921 · ‎2007-02-23

Posted on February 24, 2007 at 04:38

gas51921 · ‎2011-05-17

Posted on May 17, 2011 at 10:13

hello,

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!

gas51921 · ‎2011-05-17

Posted on May 17, 2011 at 10:13

i have another question. how to confirm the value of the resistance and the capacitor on the RC PIN, thank you for your help!

vincenzo1 · ‎2011-05-17

Posted on May 17, 2011 at 10:13

Maximum current ratings in L6208 datasheet consider internal metallization structures. L6208 maximum current is actually limited by power dissipation (junction temperature should not exceed 125 degrees). L6208PD (PowerSO package) and a good layout (PCB copper is the heatsink) can handle about 1.5A rms per channel. Using a special layout (many layers, large copper areas or aluminium substrate) or adding a real heatsink allows better heat removal thus a higher current.

Maximum current ratings in the datasheet (2.8A rms, 5.6A peak) should never be exceeded, regardless of the IC temperature.

The practiSPIN software, downloadable at the address below, includes a section for power dissipation and thermal analysis.

Regards

Vincenzo Marano

STMicroelectronics

http://www.st.com/stonline/products/families/motor_control/integrated_power_stages/evaluation_environment/practispin.exe

ma99lo · ‎2011-05-17

Posted on May 17, 2011 at 10:13

Hi Jo Jo, I am looking for a simile project ? have you completed your? would you like to collaborate with me? please, contact me at:

mailto:ma99lo@libero.it

Thanks a lot.