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Should the over voltage protection circuit placed after the TVS diode? What is the general way of placing the protection blocks? Am I missing anything apart from these protection blocks?


No like this, the fastest device should be nearer to the input. In general the OV/OC protection is slower than the TVS so an overvoltage peak at the input will trigger the TVS first and maybe blow the fuse, protecting the (more expensive !) OV/OC circuit.

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  • \$\begingroup\$ According to thisApplication Note FUSE should come before the TVS. Althoughh I agree with you about protecting the " more expensive" part, I want to ensure the safety of the entire circuit \$\endgroup\$ – mic Nov 6 '15 at 15:17
  • \$\begingroup\$ OK, I was not suggesting to move the fuse anywhere else ! The fuse must where it is in your schematic. The fuse protects against overcurrent which will flow when the TVS triggers. I actually see the TVS and the fuse as ONE protection. Only a TVS by itself is not enough. \$\endgroup\$ – Bimpelrekkie Nov 6 '15 at 15:33
  • \$\begingroup\$ Sorry about that @FakeMoustache . I misinterpreted it \$\endgroup\$ – mic Nov 7 '15 at 3:09
  • \$\begingroup\$ No worries :-) As long as it is clear to you now. \$\endgroup\$ – Bimpelrekkie Nov 8 '15 at 12:20

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