Project Hub /Basic Analog & Power Electronics/Inverters & Converters/High Power DC-DC Boost Converter Using TL494

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₹500 – ₹1,500

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High Power DC-DC Boost Converter Using TL494

Design, build, and test a high-efficiency DC-DC boost converter circuit driven by the TL494 PWM controller and IRFP250 MOSFET.

Originally published on CircuitDigest

View original tutorial

Parts You'll Need

This project is sourced from another site, not written by us — this list is our best match of their components against what we stock, not a verified bill of materials. Always check the original blog (linked above) for the actual parts list before buying.

10pcs - 220 ohm 1/4 W Resistor Set Rs. 39.00
DC Motor Plastic Fan Blade Rs. 19.00
Jumper Wire 10 Pin Male To Male 20cm Rs. 45.00
400 Points Mini Solderless Prototype PCB Breadboard High Quality Rs. 89.00
MB102 Adjustable Breadboard Power Supply Module (3.3V & 5V) for Arduino & Raspberry Pi Rs. 139.00
Jumper Wire 10 Pin Male To Female 20cm Rs. 45.00

Selected: Rs. 0.00

This list includes a generic resistor set as a placeholder — it is not matched to the exact value or part number this circuit needs. The correct one is specified on the original source page linked above; check it before buying.

We don't carry yet: Microcontroller IC (DIP) / Chip
Transistors (BC547 / 2N2222 / TIP / MOSFET)
Thyristor / SCR / Triac / Varistor / Fuse
Capacitors
Diodes (1N4007 / 1N4148 / Schottky / Zener)
Inductors / Coils / Ferrite
Potentiometer / Trimpot
Clad Board Generic 50x50mm - 1

Browse all components

How It Works

The boost converter operates by using a switching MOSFET to control energy storage in an inductor. When the MOSFET turns ON, the inductor charges and stores energy in a magnetic field. When the MOSFET turns OFF, the magnetic field collapses, forcing current through a Schottky diode to charge the output capacitor at a higher voltage than the input. The TL494 PWM controller modulates the duty cycle and monitors voltage and current feedback loops to maintain a stable regulated output.

Why Build This

Step up a low DC input voltage to a higher regulated output voltage efficiently

Learn the internals of PWM generation and feedback loop design using the TL494

Capable of delivering high power outputs exceeding 100 watts

Real-World Application

High-power boost converters are widely used in renewable energy systems, electric vehicles, battery-powered equipment, and audio amplifiers requiring stepped-up DC voltages.

Skills You'll Learn

Understanding switch-mode power supply (SMPS) principles | Configuring the TL494 PWM controller internal architecture | Calculating inductor and capacitor values for boost converters | Implementing feedback loops for voltage and current regulation

Safety Precautions

Ensure proper heat sinking on the IRFP250 MOSFET and diodes, as high-power switching generates significant heat. Double-check all polarity connections for input and output capacitors to prevent explosions or damage. Handle high output voltages and heavy load testing with caution to avoid electrical shock.

Technology Tags

TL494

IRFP250

MOSFET

PWM CONTROLLER

SCHOTTKY DIODE

INDUCTOR

DC-DC BOOST CONVERTER

Frequently Asked Questions

Why use the TL494 instead of a ready-made DC-DC module?

The TL494 provides full control over PWM generation, duty cycle, and feedback loops, making it highly flexible and ideal for learning power electronics design.

How do I choose the right MOSFET?

Select a MOSFET with a voltage rating greater than your output voltage, a current rating exceeding your maximum load, and low RDS(on) resistance.

Can I achieve a higher output voltage or current?

Output voltage can be increased by adjusting the duty cycle while respecting component ratings, whereas current capacity depends on the inductor core size, MOSFET limits, and PCB trace thickness.

Gallery

This page is part of Kitkraft's Project Hub — a curated collection of electronics & robotics projects gathered from the maker community to help students and hobbyists discover and learn to build. Kitkraft does not claim authorship of the original project, and makes no representation as to the accuracy, completeness or safety of third-party source material. The summary and "How It Works" explanation above are AI-generated, rewritten with reference to the original tutorial — not a reproduction of it. Full credit and a direct link to the original source are provided above. If you're the original creator and have a concern about how your work is represented here, please contact us and we'll address it promptly.

Kitkraft Project Hub — curated from the maker community, credited at the source.

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