300W UPS circuit diagram with Automatic Cutoff Battery Charger.

CD4047 inverter circuits can convert 12VDC to 220VAC 50HZ we use IC-4047 for oscillator and mosfet driver the transformers to output. 

• 300 watts Inverter using IC-4047, IRF3205.
• This is the inverter 300W circuit, use IC 4047  I use MOSFET IRF3205.
• It good Idae, power output 300W from transformer 30A.

How it works

The 12V battery comes into the circuit. The IC1 will work as astable multivibrator circuit. Makes it products the square wave frequency, 50Hz out of both pin 10 and pin 11.

We use CD4047 because the output is 50% duty cycle. .

This is AC Inverter. Input 12VDC from car battery to output 220V AC 50Hz or 60Hz at Square wave signal.

• The main part is CD4047 (or IC 4047 Series) and MOSFET IRF3205.
• The transformer is 10V-CT-10V, Primary : 220V Secondary. and 
• Current 25A up for power output than 300W.

Note:

• C1 = 0.01uf metalized-film capacitor, 5% tolerance.
• R6 = 47K for 50Hz output, 39K for 60Hz output.
• 300 watts DC to AC converters circuit using IC-4047.
  

Automatic Cutoff Battery Charger.

10k RVI for setting cuttoff voltage.

D5 LED for showing full charged.

D7 LED for showing charging.