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help needed with UCN5804b

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thavamaran

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stepper motor circuit with ucn5804b

Hi guys, im currently working with ucn5804b for my stepper motors, but the problem is from what i understand through the datasheet, it only supports 4 phase steppers, im planning to use 2 phase steppers, is it possible that ucn5804b can support 2 phase motors? and another thing, there is some problem with the quality of IC whereby me and few of my frens roast our UCN5804b by just connecting them according to the given schematic in datasheet.

I think that might be the problem with the output line where the current from stepper motor strike back the IC, can i get any suggestion on the circuit design, as what i thought was may be i could fix a diode on the output line and a resistor for current limiting.

I know the resistor value can be calculated out with ohms law, but then how about the power rating of the resistor? please guide me on this particular resistor part.
 

my friend it is better to shift to another stepper motor driver ic as 5804 id best suitted for unipolor motors
 

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