Hi Na
I convey a result of the wave pattern observation by TPS40192EVM525.
As a result, I was able to acquire similar waveform.
Condition:
a. There is no fixed number change in TPS40192EVM525.
b. I connect electrolysis capacitor 470μF and two MLCC 22μF to the Vin side.
c. I do not connect load to the Vout side.
d. It supplies 12V to the Vin side.
CH1: Vin(TP1) CH2: Vout(TP15) CH3: LDRV(TP10) CH4: COMP(TP6)
The mean voltage of Vout is around 0.2V outbreak at the time of phenomenon outbreak.
The undershoot is around 0.9V outbreak.
In addition, the COMP signals identify a similar wave pattern, too.
Please tell me the logic of the outbreak.
Thanks,
Masami