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I have very little experience with these type of things and I couldn't find the answer anywhere else. I want to use LTC3780 module with ATX PSU to primarily charge batteries (deep cycle battery and maybe lead acid batteries).

In the description it says that it does not have backflow protection. I assume if I were to charge batteries and then disconnect module from the input voltage, battery would kill the module? To prevent this I should use Schottky diode.

There are diodes like 20SQ045 which are rated at 45 V 20 A and would be more than enough, but in the description it says to use diodes in series? Can someone help me and tell me what diodes should I use? Do I really have to use more than 1? I am aware that more powerful diodes have a higher current leakage but how much is too much?

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    \$\begingroup\$ You should add links to the datasheets for the LTC3780 and 20SQ045 so people can help you. I assume by series, they mean as opposed to parallel, not that you need more than one. \$\endgroup\$ – evildemonic Oct 12 '18 at 17:27
  • \$\begingroup\$ Hey @evildemonic thanks for the reply, data sheets were added by Greenonline thanks to him. So do you think 20SQ045 is enough or maybe too much ? Should i use weaker ones ? \$\endgroup\$ – xPalis Oct 13 '18 at 14:57

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