How do DC AC power inverters create 50 hz?

I saw like 5 IC's inside my 400 watt power inverter is that how? Why would you possibly need IC's in an inverter? What should I never run off a power inverter to avoid risk of damage to appliance? What is the 40 amp fuse in the back of it for? Is it in case their is a fault so I dint get killed? PS It... show more I saw like 5 IC's inside my 400 watt power inverter is that how?
Why would you possibly need IC's in an inverter?
What should I never run off a power inverter to avoid risk of damage to appliance?
What is the 40 amp fuse in the back of it for? Is it in case their is a fault so I dint get killed?
PS It takes DC 12v to AC 117-126v.
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