DRV8839: Motor Driver

Shibin Varghese

Part Number: DRV8839

Hi Friends,
I would like to use DRV8839DSSR motor driver for one of my projects.
The control signals (input and Enable) are from a microcontroller of 3.3V.
Vm =7V.
If Vcc is connected to 7V will it work?

over 4 years ago

0 Madison Eaker over 4 years ago

TI__Prodigy 460 points

We do not recommend connecting VM and VCC together at 7V. When VM and VCC are connected, a voltage spike on the motor load can cause VM to exceed 7V and violate the absolute maximum VCC voltage of 7V. We recommend lowering the voltage on VCC. Please consider using the 3.3V MCU supply to provide VCC to the DRV8839.

0 Shibin Varghese over 4 years ago in reply to Madison Eaker

Expert 1130 points

Thank You Madison Eaker

My doubt is, is the 3.3V logic inputs are sufficient enough to switch the on-off states when the VCC is connected to 7V.

0 Madison Eaker over 4 years ago in reply to Shibin Varghese

TI__Prodigy 460 points

The 3.3V logic inputs are marginal to switch the on-off states when VCC is 7V. We recommend lowering the voltage on VCC.

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DRV8839: Motor Driver