My design is using MPM3683GQN-7 to convert 12v to 3.3v. I want to protect the circuit from wrong setting on dps(direct power supply), like the previous value is 24v or 48v and someguy may accidentally power on that setting.
As the datasheet mentioned there is already integrated ovp; but I’m uncertain whether the integrated ovp can deal with my problem.
Hello Louis, apologies for the delayed response.
The MPM3683-7 is not recommended for new designs. I would first suggest switching over to the following part as it has the same voltage capabilities and a higher continuous current threshold of 10A.
Package pinout and dimensions are also nearly identical:
As for someone erroneously plugging in 24V or 48V, you would be correct that it is likely that the OVP on this module would not be enough to completely protect this module.
You may even need something like an E-Fuse or a Load Switch to protect the input of this power supply. What is your expected input current? I know your output can’t be any more than 7A, but just wanted to gauge.
For now, I can recommend the following: MP5048A | 60V, 4A, 14mΩ RDS(ON), Hot-Swap Intelli-Fuse Solution | MPS
Let us know if there have been any updates since it has been some time.
Best,
Krishan
