Hi sir,
Regarding this part, at the moment a higher voltage 6V are output from LM2672MX-3.3/NOPB when our production power on and repeating ON/OFF operation,
then the DP83822 in our production had a breakdown due to this reason.
Vin=24v DC
Please find the ripple below, yellow line is DC/DC converter output ripple, and aqua line is DC/DC converter input ripple.
Could you please help me to analysis why the output voltage is over 3.3V?
BOM:
L2:CLF10060NIT-470M (TDK)
Max Vin:DC26V
Max I:47μF/2A
C52:GRM31CF10J107ZE01L (Murata)
Max Vout:3.3V
inductor: 100μF/6.3V
D1:B240A-13-F (Diodes Incorporated)
2A/40V
C63:C2012X5R1V226M125AC (TDK)
22μF/35V
C51:GRM155B31H103KA88D (Murata)
0.01μF/50V
PCB layout design
Vin:Red
GND:Blue(Bottom to GND)
Vout:Green
Best Regards,