This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Part Number: DRV8837
I am failing a CE emissions test with peaks that starting around 150mhz to 190mhz. One I remove the DRV8837 from the circuit the peaks disappear. I know the IC has built in charge pump running 30mhz..35mhz and this is exactly the spacing I see marker to market of the peaks. I am thinking that the peaks are a harmonic of the charge pump frequency. Is this a good assumption and what has been done in the past to fix the issue. I have 2 .1uf caps on 3.3vdc power pic and same on the VM power pins as close to the IC as possible.
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 James Lockridge19:
Thank you for the prompt reply. I will be prototyping soon and retesting. I have one other question: if we do not have success in passing CE testing is there another IC H-Bridge motor driver in the family that operates similar and is known for having less emissions? 2A output or so. Static IN1 and IN2 inputs with no PWM.....For my future design are there plans for any new drivers with maybe 3A to 5A capability?
In reply to Richard Brannan:
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.