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.
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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:
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