How to Make a Pure Sine Wave Inverter Using EG8010 + IR2110S | Step-by-Step Guide

If you are looking for a reliable way to make your own inverter at home, this guide will help you build a low-frequency pure sine wave inverter using the EG8010 ASIC SPWM controller, IR2110S driver ICs, and MOSFETs. This design is widely used for 220V AC output inverters suitable for home appliances, fans, lights, computers, and more.

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In this post, we will explain the circuit diagram, working principle, PCB conversion, and connections so you can easily make your own inverter.

🔧 Components Required

EG8010 – SPWM Controller IC
IR2110S – High/Low side MOSFET driver IC
MOSFETs (IRF3205 / RFP260N / similar) – Power switching
LM393 – Comparator for protection
7805 Regulator – For 5V supply
NTC Thermistor – Temperature sensing for cooling fan
Power Transformer (12V to 220V) – Step-up transformer
Diodes (FR107 / IN4148) – Fast recovery and switching
Capacitors (10µF, 100µF, 4.7µF, etc.) – Filtering
Resistors (4.7Ω, 100k, etc.) – Gate & bias resistors
Cooling Fan – Automatic temperature control

⚡ Circuit Diagram Explanation

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The above circuit is based on the EG8010 + IR2110S Sinusoidal Inverter Design.

SPWM Generation
- The EG8010 IC generates pure sine wave PWM signals.
- These signals are sent to the IR2110S driver ICs which amplify them to drive the MOSFET gates.
MOSFET Full-Bridge
- Four MOSFETs (Q1–Q4) form an H-Bridge.
- The SPWM signals switch these MOSFETs alternately to produce AC at the transformer input.
Step-Up Transformer
- The transformer converts 12V DC to 220V AC output.
- Since it’s low frequency, it is highly efficient for household loads.
Cooling and Protection
- An NTC temperature sensor automatically controls the fan.
- The LM393 comparator monitors feedback and protects against over-current.

📐 How the Inverter Works

When 12V DC is applied, the EG8010 controller generates a sinusoidal PWM signal.
The IR2110S driver amplifies the signals and drives the MOSFETs.
The MOSFETs alternately pass current through the transformer primary, creating an AC waveform.
At the secondary, you get 220V pure sine wave output suitable for home use.

🖥️ Converting Circuit into PCB

To make this project more professional:

Draw the circuit in PCB design software (EasyEDA, KiCad, Altium).
Use thick copper traces for the MOSFET and transformer lines (high current path).
Keep gate driver traces short for better switching.
Add heat sinks for MOSFETs and ensure good ventilation.

You can easily order the PCB from manufacturers like JLCPCB or PCBWay.

🔌 Practical Connection Guide

Battery Input: Connect 12V battery to +12V and GND.
AC Output: Connect transformer secondary to output terminals for 220V AC.
Cooling Fan: Connect to the thermistor-controlled output for auto ON/OFF.
Load: Plug in fan, lights, or other appliances (up to design rating).

Video Reference:

$5 10pcs 1-2 layer PCB Order from PCBWay: https://www.pcbway.com/?from=technology4power

✅ Advantages of This Design

Pure sine wave output (safe for sensitive electronics)
Low frequency transformer – reliable & durable
Automatic cooling fan control
High efficiency with MOSFET H-Bridge
Easy PCB conversion for compact design

🏆 Conclusion

With the EG8010 + IR2110S based pure sine wave inverter, you can easily design a reliable and efficient power backup system. This inverter provides stable 220V AC output, making it perfect for home appliances, computers, and other electronics. By converting the schematic into a PCB, you can make your own professional inverter for long-term use.