barjaktar
Junior Member level 1
Hello.
I need to give pulses of above mentioned voltages on one line. Of course, at different times. For example, 2us I need the voltage to be 5V, then 2us 12V, and then 2us it goes to 7V. For now, I am trying to get 12V and 5V levels working. All this is to be driven by a MCU pin, which is 5V. This makes it the simplest thing for 5V level, but at 12V it gets a bit more complicated. For some reason, even though I get fine on/off pulses at the gate of the 12V-PMOS, it's drain never gives me 12V. Vds voltage goes up to 4 or 5V...
Why is this happening? Is my approach wrong?
If you would need me to upload the project file or the simulation results, just let me know. I am using this MOS because we have those in the lab...
Thank you.
I need to give pulses of above mentioned voltages on one line. Of course, at different times. For example, 2us I need the voltage to be 5V, then 2us 12V, and then 2us it goes to 7V. For now, I am trying to get 12V and 5V levels working. All this is to be driven by a MCU pin, which is 5V. This makes it the simplest thing for 5V level, but at 12V it gets a bit more complicated. For some reason, even though I get fine on/off pulses at the gate of the 12V-PMOS, it's drain never gives me 12V. Vds voltage goes up to 4 or 5V...
Why is this happening? Is my approach wrong?
If you would need me to upload the project file or the simulation results, just let me know. I am using this MOS because we have those in the lab...
Thank you.