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DRV8837C: Battery operated control circuit to operate a 6v DC latching valve using Attiny13 controller and DRV8837 motor driver IC.

manik sonawane
Prodigy 20 points
Part Number: DRV8837C
Other Parts Discussed in Thread: DRV8837, DRV8838, , DRV8832, DRV8830, CC2650

Hello All,

Nice to see your support for new Entrepreneurs.I am Prof. Manik Sonawane from India and I am Professor in Electronics and Communication Engineering.
I need little guidance from you regarding some design issues of my student project to whom I am guiding them in their final year engineering project.
Details are-
We have designed a 6Volts Battery operated control circuit to operate a 6v DC latching valve using Attiny13 controller and DRV8837 motor driver IC.
beside using micro controller sleep mode and latching pulse timing duration we are not getting battery life as expected.
We are going to use this uint for 50 operation perday with atleast 6 to 8 months battery life of Alkaline 1.5 v Four Cells.

Please guide which controller and motor driver I have to select and please provide me any circuit reference for such kind of application.

Thanks and regards

Prof.Manik Sonawane

maniksonawane@aol.in

  • 0
    TI__Genius 14487 points
    Hello Professor Sonawane,

    I would consider our DRV8837, DRV8837C, and DRV8838 to be the best choices for this application because of their low sleep currents.

    Alternatively, the DRV8830 and DRV8832 may also be good for your application. These devices generate PWM internally to maintain motor speed over a range of battery voltages. The current-limiting feature can help save power during motor startup and stall conditions.

    If you are experiencing extra current leakage during sleep time, make sure that all of the logic inputs to the device are set to LOW in sleep mode. Our inputs many times have pulldown resistors that will sink current during sleep mode if a HIGH signal is left on the input.

    For hardware examples, go to the "Tools and Software" tab in the product folders for each of these devices. You can go to the product folders by clicking on the part numbers in this post.

    As for controllers, I recommend posting on the MSP430 forum for recommendations. Our MSP430 devices are meant for very low power applications. We also have vary low power RF MCUs you may want to consider too if your students have an RF application (like CC2650).
  • 0 in reply to James Lockridge19
    TI__Expert 8985 points
    Hi Prof. Sonawane,

    Did Mr. James' suggestion resolve your question?

    If so, please close this post by accepting the post is resolved in James' highlighted in yellow answer above me.

    Thanks!