Other Parts Discussed in Thread: DRV8830, DRV8876, DRV8847, DRV8412, DRV8873-Q1
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.