TL494 SMD IC – PWM Controller Chip for SMPS, Inverters & DC-DC Converters

Description

The TL494 SMD IC is a powerful and versatile pulse-width modulation (PWM) controller chip widely used in switch-mode power supplies (SMPS), inverters, DC-DC converters and other power electronics applications. It brings full PWM generation capability—oscillator, error amplifiers, dead-time control, and output driver transistors—all integrated into a single SMD package. TI+2onsemi+2

This makes the TL494 an ideal choice for engineers, technicians and hobbyists designing or repairing circuits that require precise control over duty-cycle, switching frequency and output power. Whether you’re building an inverter system, solar charger, power supply for appliances or a custom electronics project, this IC offers robust control features and flexible implementation.

⚙️ Key Features

• Complete PWM control circuit: includes oscillator, two error amplifiers, dead-time control, output transistors and built-in 5 V reference. onsemi+1

• Wide supply voltage range: operates from about 7 V to 40 V (depending on variant) and supports full power-supply design. onsemi+1

• Dual outputs with push-pull or single-ended configuration allowing flexible driver topology. Octopart+1

• Adjustable oscillator frequency via external RT/CT (timing resistor + timing capacitor) allowing control of switching frequency. onsemi+1

• Dead-time control pin (DTC) allows setting minimum off-time between output pulses, which enhances safety and reduces overlap in push-pull or half-bridge topologies. onsemi

• SMD form-factors make it suitable for modern PCB layouts where space is limited.

🧪 Technical Specifications (Highlights)

• Package: 16-pin SMD (SOIC-16, TSSOP-16, etc) TI+1

• Supply Voltage (VCC): Up to ~40 V max; recommended ~7 V to 40 V. onsemi

• Output transistors: capable of ~200 mA sink/source each (depending on variant) Octopart

• Built-in 5 V reference for feedback circuits. onsemi+1

• Oscillator frequency and duty-cycle controlled via external components (RT and CT) Octopart+1

• Dead-time control: allows minimum off time to avoid simultaneous conduction in power devices. flywing-tech.com

📋 Applications

• Switch-mode power supplies (SMPS) for computers, appliances and industrial modules

• Solar inverters and battery charging controllers

• DC-DC converters (buck, boost, fly-back)

• Motor drive switching circuits

• Audio amplifiers and power supply modules where PWM control is required

🛠 Why Choose TL494 SMD IC?

If you’re designing or repairing a circuit that demands fine control over switching behavior, duty-cycle variation, safe driver topology and compact form-factor, the TL494 SMD IC is an excellent choice. Its versatility means you can use it not only for power supplies, but for inverters, solar applications, motor drivers and more. Because it includes key features such as dead-time control and dual error amplifiers, your design will benefit from enhanced reliability and controllability.

🏪 About Rafiq Electronics

At Rafiq Electronics, we supply genuine, high-quality SMD components like the TL494 SMD IC. Every unit is verified to meet specification, ensuring that your design or repair job uses reliable parts. Whether you’re a hobbyist or a professional, you’ll find trusted components and support at Rafiq Electronics.