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Small question about l6203 !!

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black-code

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Hello all,..

I am using l6203 with atmega32 mc to make a speed control for a dc motor by using pwm technique.

1-
I want to ask when i connect the pin of the pwm to the l6203 h-bridge it shoul be connected to the in1 pin of the h-bridge and giving the another in2 pin 0 (reverse the states of in1 and in2 for the opposite direction) and the enable will be always high.

or:

2-
Connect the pwm pin to the enable pin of the h-bridge and make in1 high and in2 low (reverse the states of in1 and in2 for the opposite direction) ??

In my connections i used the second method, i am correct or not??

Hint: my h-bridge burned out many times but i wasn't connect the bootstrap capacitors at pins 4,8 so if applying pwm to the enable pin of the h-bridge may cause a damage to the h-bridge or the missing bootstrap capacitors is only the reason of that problem.

Thanks.
 

laktronics

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Hi,
Both connections work in identical way and it would not make any difference. Always try to follow the manufacurer's application notes unless you have a specific reason to change, because the manufacturers know inside out of the product. So, the failure should have come due to reasons outside the connections 1 or 2 given by you.
Regards,
Laktronics
 

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