Interleaved Buck Converter Design & Simulation
Budget: ₹600 – ₹1,500 INR
This project requires the design and simulation of a 2-leg interleaved buck converter, followed by the creation of its corresponding PCB layout. The primary goal is to develop a system that steps down a 48V DC input to a stable 12V DC output. The converter will be digitally controlled by a virtual Arduino microcontroller programmed in C. A key feature of this project is the use of optocouplers for isolated gate driving of the power MOSFETs.
Functional Description
Power Stage: The core of the circuit is a two-phase (2-leg) interleaved buck converter. This topology uses two buck converter circuits operating in parallel and out of phase. This approach helps to reduce the input and output current ripple, decrease the size of required magnetic components, and improve transient response compared to a single-phase converter.
Control Unit: A virtual Arduino Uno board will serve as the brain of the system. You will need to load your custom C code onto this virtual microcontroller to generate the precise Pulse Width Modulation (PWM) signals required to control the converter's duty cycle and maintain the desired 12V output.
Gate Driver Interface: To ensure electrical isolation and provide robust gate signals to the power MOSFETs, the design will incorporate optocouplers like the HCPL-3120 or TLP250. The Arduino's PWM outputs will be fed into these optocouplers, which will then drive the gates of the MOSFETs in each leg of the buck converter. This isolation is crucial for protecting the low-voltage control circuitry from the high-voltage power stage.
Project Deliverables
The final deliverables for this project are:-
Proteus Simulation File: A complete, functional simulation file that accurately models the entire circuit, including the virtual Arduino, optocouplers, and the interleaved buck converter. The simulation should allow for direct loading of C code onto the microcontroller.
Gerber Files: A full set of Gerber files for the PCB layout derived from the Proteus schematic. These files are the industry standard for PCB manufacturing and should be ready for production.
Functional Description
Power Stage: The core of the circuit is a two-phase (2-leg) interleaved buck converter. This topology uses two buck converter circuits operating in parallel and out of phase. This approach helps to reduce the input and output current ripple, decrease the size of required magnetic components, and improve transient response compared to a single-phase converter.
Control Unit: A virtual Arduino Uno board will serve as the brain of the system. You will need to load your custom C code onto this virtual microcontroller to generate the precise Pulse Width Modulation (PWM) signals required to control the converter's duty cycle and maintain the desired 12V output.
Gate Driver Interface: To ensure electrical isolation and provide robust gate signals to the power MOSFETs, the design will incorporate optocouplers like the HCPL-3120 or TLP250. The Arduino's PWM outputs will be fed into these optocouplers, which will then drive the gates of the MOSFETs in each leg of the buck converter. This isolation is crucial for protecting the low-voltage control circuitry from the high-voltage power stage.
Project Deliverables
The final deliverables for this project are:-
Proteus Simulation File: A complete, functional simulation file that accurately models the entire circuit, including the virtual Arduino, optocouplers, and the interleaved buck converter. The simulation should allow for direct loading of C code onto the microcontroller.
Gerber Files: A full set of Gerber files for the PCB layout derived from the Proteus schematic. These files are the industry standard for PCB manufacturing and should be ready for production.