Full Bridge Inverter Design
Thought for 4 sec
You want to build a full-bridge inverter using IRFB4110 N-channel MOSFETs and IR2110 high/low-side gate driver ICs.
I can help design the schematic, but I’m currently unable to execute project changes because there are no available ACUs. Also, the current project appears to have been largely cleared recently: it shows 26 components of only
RouteBranchPoint type and 0 nets, so the ESP32 reference design circuitry is not currently intact.What remains to define before implementation:
- DC bus voltage and power target, e.g. 12 V / 24 V / 48 V and output watts
- Output type: square wave, modified sine, or SPWM sine inverter
- Load type: resistive, motor, transformer primary, AC output, etc.
- Switching frequency
- Control source: ESP32 PWM, SG3525/TL494, analog oscillator, or external MCU
- Required protections: fuse, current sense, undervoltage, overtemperature, shoot-through dead time
- Whether you want isolated AC output through a transformer or direct H-bridge output
Default architecture I’d recommend:
- 4× IRFB4110 MOSFETs in full bridge
- 2× IR2110 drivers, one per half-bridge
- Bootstrap diodes and capacitors for the high-side drivers
- 10–22 Ω gate resistors on each MOSFET
- 10 kΩ gate-source pulldowns
- DC-link bulk capacitors near the bridge
- Fast local ceramic decoupling on each IR2110
- Dead-time enforced by the PWM controller
- Current sensing and DC bus protection before testing under load
Once ACUs are available, I can create the full schematic in this project and verify the gate-driver wiring, bootstrap network, MOSFET bridge, power input, and protection circuitry.
Set inverter specs
Find required parts
Show driver wiring
Calculate gate values
Add protection requirements
