Part Number: DRV8837
Is it possible to achieve a sinusoidal o/p current from the DRV8837 by modulating the PWM drive? Or would another device be more suitable (5V Vcc, 1.8A pk)?
Yes, it possible. But the DRV8837 may not be the best device depending on the application.
Can you provide more details on your application?
What load are you driving?What is your desired PWM frequency?What features of the DRV8837 are desired?Any other information?
Rick DuncanMotor Applications Team
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
In reply to Rick Duncan:
What load are you driving? DC Motor
What peak current do you require? 1.2 A peak, 0.9A RMS
What is your desired PWM frequency? 1kHz
What features of the DRV8837 are desired? Sleep Mode
Any other information? Limited space
In reply to Jim Perkins:
Thank you for the additional information.
Assuming the DC motor is brushed, the following devices are also possible options:
The DRV8847 which has:
A voltage range of 2.7 to 18VAbility to monitor the current by adding an opamp on the external sense resistorRDSon of ~500mOhm in parallel (higher than the DRV8837)
The DRV8850 which has:
A voltage range of 2 to 5.5V ( 7V abs max -- this could be an issue)RDSon of 65mOhmAbility to monitor the current using the VPROPI outputAn integrated adjustable LDO that can provide up to 100mA
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.