DRV8434S: Two motor drivers with outputs connected together (AOUT1 to AOUT1), but only 1 driver active at a time?

Jacob Thompson

Part Number: DRV8434S

Hello, I want to have two motor drivers on the board populated, and pick between which driver to use. Only one driver will be awake at a time. AOUT1 connected to AOUT1, BOUT1 to BOUT1 etc.

This means that there will be full VM voltage on the OUTx pins of the driver that is asleep. Will this be okay? The pins will be in Hi-Z mode so I was thinking it would be okay, but wanted to make sure.

Best,

Jacob

over 1 year ago

0 Karan Doshi over 1 year ago

TI__Intellectual 2550 points

Hey Jacob,

I suppose it should be okay. I drew the circuit out and don't see a dead-short condition arising. Just to be safe, maybe put in some dead time if possible between one driver "waking up" and the other sleeping.

Regards,
Karan

Motor drivers

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DRV8434S: Two motor drivers with outputs connected together (AOUT1 to AOUT1), but only 1 driver active at a time?