Trying to move on from optoisolators and relays to mosfets or IBGTs due to power consumption. I want apply to projects running on battery.
I am getting so confused with SOA charts.
I am just looking for a logic level IC (5v) that would be able to switch (no pwm) a battery recharger on or off. 28v max current flow for the recharger is 4.5A.
Would prefer SMD small form factor without the need for a heatsink
Also if optoisolators are made with these components why are their specs so much more straight forward - rated by max volts and amps? no heatsinks / heat issues, just max ratings…simple! why are rating mosfets so much more complicated (SOA, ,heat dissipation depending on voltage/current ratios, etc.?