DRV8803: What happens if some inputs are not connected

Dukel

Part Number: DRV8803

Hi,

In my next PCB I well use the DRV8803 16-pin HTSSOP again, but instead of using all 4 in/outputs I only need two.

I was not able to find any circuit recommendations in the datasheet if some in/outputs are not connected. Would it be better to connect the not connected inputs to a pull-down circuit, so there is no floating?

Best regards,

over 6 years ago

0 Wang5577 over 6 years ago

TI__Guru 56650 points

Dukel,

Output pin can be floated.

DRV8803 INx pin can be floated because of 100kohm internal pulldown resistor.

0 Dukel over 6 years ago in reply to Wang5577

Intellectual 610 points

Hi Wang,

Thanks for the reply, so for the IC it doesn't matter that I don't connect two inputs and two outputs at all. It is safe to connect 2 inputs and 2 outputs?

0 Wang5577 over 6 years ago in reply to Dukel

TI__Guru 56650 points

Dukel,

It doesn't matter that you don't connect two inputs and two outputs at all.

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DRV8803: What happens if some inputs are not connected