T
treez
Guest
Hi,
We are using the LM5019 for a Buck converter
Vin = 60V
Vout = 12V
Iout = 7mA
We notice a spike on the LM5019 drain voltage of 20V in magnitude...as in the attached. This surprises us, as the hi side FET is a N-channel mosfet. (so it should have a diode with cathode connected to vin.)
Can you see any reason why we cannot place a super fast rectifier from Drain to vin of LM5019, in order to staunch this spike?
As you can also see, the inductor current is bi-directional (seen here in a 4R7 in series with the Buck inductor)
LM5019 monolithic synchronous buck converter datasheet:
https://www.ti.com/lit/ds/symlink/lm5019.pdf
We are using the LM5019 for a Buck converter
Vin = 60V
Vout = 12V
Iout = 7mA
We notice a spike on the LM5019 drain voltage of 20V in magnitude...as in the attached. This surprises us, as the hi side FET is a N-channel mosfet. (so it should have a diode with cathode connected to vin.)
Can you see any reason why we cannot place a super fast rectifier from Drain to vin of LM5019, in order to staunch this spike?
As you can also see, the inductor current is bi-directional (seen here in a 4R7 in series with the Buck inductor)
LM5019 monolithic synchronous buck converter datasheet:
https://www.ti.com/lit/ds/symlink/lm5019.pdf