DRV8825: DRV8825 is not working

jonghwan kim

Prodigy 30 points

Part Number: DRV8825

Hello.

I make using DRV8825 motor driver.

But it is not working

I attached schematic.

Can you help me?

Thank you

over 4 years ago

0 Wang5577 over 4 years ago

TI__Guru 56650 points

Jonghwan,

From the schematic, I didn't see the problem.

Would you help me measure each pin voltage?

0 jonghwan kim over 4 years ago in reply to Wang5577

Prodigy 30 points

If I supply voltage rest and sleep pin to 3.3V, It is working

But If I short rest and sleep pin, It is not working.

Can you tell me why?

0 Wang5577 over 4 years ago in reply to jonghwan kim

TI__Guru 56650 points

Jonghwan,

When you short REST and nSLEEP pin, what is the voltage on nSLEEP pin? If it is low, the motor driver doesn't work as expected. BTW, the nSLEEP has an internal pulldown resistor.

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DRV8825: DRV8825 is not working