I need to supply 10-15A at variable voltage without anything getting too hot. Is it good practice to use several MOSFETs to handle larger currents?
I am currently using an IRF9630 P-FET with an Rds_ON of 0.5-0.8 ohms, but will likely use something better for my finished device.
I am aware that FETs aren’t 100% identical, but I’ll check to make sure they output the same voltage down to two decimal points. A quartet handling 15A would each have a W_dissipate of 3, assuming a terrible Rds_ON of 0.8 ohms.
Edit: Olin has schooled me, but I need more schooling. My FET absolutely must not fail closed, or some things will be destroyed. How do you guys protect hardware from this kind of malady?
Cluebats... my skull is thick.