DRV8834: distance between AOUT & BOUT to motor

Hsu Jamie

Prodigy 30 points

Part Number: DRV8834EVM
Other Parts Discussed in Thread: DRV8834

We would like to know what is the the farthest distance from AOUT & BOUT to motor ?

over 4 years ago

0 Ray Lin over 4 years ago

TI__Prodigy 695 points

Part Number: DRV8834EVM

Customer is using DRV8834 and they would like to know what is the the farthest distance from control pad to motor ?

0 Pablo Armet over 4 years ago

TI__Mastermind 37683 points

Hello Hsu,

The wire gauge size, material type, and motor specs will be some of the factors affecting the distance. The wire distance should not be too long as to cause the power from the output to drop below the minimal power ratings needed for the motor to operate.

0 Hsu Jamie over 4 years ago in reply to Pablo Armet

Prodigy 30 points

Hello sir,

If we use FPC of 600mm, this distance is ok?

And if we use motor spec as below, what the wire of trace width we should design？

Rated Voltage : 5 VDC

Resistance : 14 Ω

Exciting Driving : 2 phase Bipolar

Pull in torque(at 2400pps) : 17.5mNm

Speed(at 2400ps) : 36.9rpm

0 Hsu Jamie over 4 years ago in reply to Pablo Armet

Prodigy 30 points

Hello sir,

If we use FPC of 600mm, this distance is ok?

And if we use motor spec as below, what the wire of trace width we should design？

Rated Voltage : 5 VDC

Resistance : 14 Ω

Exciting Driving : 2 phase Bipolar

Pull in torque(at 2400pps) : 17.5mNm

Speed(at 2400ps) : 36.9rpm

0 Pablo Armet over 4 years ago in reply to Hsu Jamie

TI__Mastermind 37683 points

Hi,

FPC of 600mm length should be okay to use. As for the trace width, you should choose one such that the trace impedance does not cause the voltage at the windings to drop below the rated 5VDC of the motor.

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DRV8834: distance between AOUT & BOUT to motor