DRV8839: We are checking the performance between DRV8839 and DRV8837.

Lian Wu

Genius 5250 points

Part Number: DRV8839
Other Parts Discussed in Thread: DRV8837,

Dears:

We are checking the performance between DRV8839 and DRV8837.

Could you give some advice about the below questions:

1. DRV8837 has two braking mode when it controls two motors, and do DRV8839 have braking mode?

Do DRV8839 happen the phenomenon of mixed braking mode if DRV8839 is driving two motors at the same time (the PWM of the two motors is independent and independent).

2. Is there any diagrams about Forward Direction and Reverse of 50% ,20% Duty Cycle?

3. Is the different between DRV8839 controlling one Motor and DRV8839 controlling two Motors from the Motors' power, response time, braking mode etc?

Thanks a lot!

Best regards

Luck Wu

over 6 years ago

0 Hector Hernandez Luque over 6 years ago

TI__Expert 8980 points

Hi Lian Wu,

I revised my answer:

What is the end application for this questionnaire? What is your operating voltage range?

See answers below:

1. We do not recommend you spin two motors with the DRV8837. Do you mean if the DRV8839 has one braking mode when driving one motor? When driving two motors, there is only one brake mode for each motor connected (the respective motor's INx PWM is low).

The PWMs are independent of each other when driving two motors. So, one motor can brake while the other coasts, brakes, or moves forward.

2. We do not have these diagrams.

3. I checked this out. There should not be a difference in the driving specs between driving one motor or two motors.

0 Lian Wu over 5 years ago in reply to Hector Hernandez Luque

Genius 5250 points

Hector:
Many thanks, we have got our answers.
Thanks a lot!
Best regards
Luck Wu

Motor drivers

Motor drivers forum

DRV8839: We are checking the performance between DRV8839 and DRV8837.