I want to power 5 fans in parallel (12V 0.80A, each) using a adjustable power supply (DIY, made with an LTC 3780 connected to a 24V 15A PSU and mini Voltmetre). I read that a fan could destroy the LTC 3780 because of the induction effect. If I'm not mistaken, when it's ON, the fan store energy in a magnetic field (because of it's winding), which can create a reverse current when we turn it OFF.
So do you confirm that I should protect a circuit from the fans ? If yes, how can I modify the DIY setup to prevent burning my circuit ? The thread mention adding a Schottky Rectifier (the 1n5819). Is a Schottky diode (supporting the right amount of voltage and current) the best way to protect my circuit ? If yes, can I simply add it on the main wire that will power the 5 fans?
More generally, should I protect any circuit from any motors ? If no, what are the rule to follow ?