Hi,
I've been trying to use a MOSFET (model PSMN8R2-80YS) to drive 50A current at 50us pulse width into 7 parallel LED load, but I realized the current can only rise at a rather slow speed (about 10us to get 40A).
What can be the cause of this and how can I improve it? The wire loop length was about 10cm so I don't think inductance is the problem problem.
I attached the circuit diagram. My power supply can not generate 50A so a big capacitor was used and the voltage was adjusted for 50A.
In the oscillograph, the yellow line is current (10A/1V), the blue line is the drain voltage and the red line is the gate voltage.
Thank you very much for your help(^^)
I've been trying to use a MOSFET (model PSMN8R2-80YS) to drive 50A current at 50us pulse width into 7 parallel LED load, but I realized the current can only rise at a rather slow speed (about 10us to get 40A).
What can be the cause of this and how can I improve it? The wire loop length was about 10cm so I don't think inductance is the problem problem.
I attached the circuit diagram. My power supply can not generate 50A so a big capacitor was used and the voltage was adjusted for 50A.
In the oscillograph, the yellow line is current (10A/1V), the blue line is the drain voltage and the red line is the gate voltage.
Thank you very much for your help(^^)
Attachments
-
88.4 KB Views: 56
-
306.4 KB Views: 51