TOP261EN

TOP261EN – High-Performance PWM Switcher IC (Power Integration TOPSwitch-JX Series)

TOP261EN is an advanced AC-DC offline switcher IC from Power Integrations, designed for compact, efficient, and highly reliable SMPS power supplies. It integrates a high-voltage MOSFET, PWM controller, and protection features into a single package, making it ideal for power supplies ranging from 15W to 120W without a heatsink and up to 300W with proper thermal design.

⭐ Key Features:

✔ Integrated MOSFET, PWM controller & control circuit
✔ Wide 85V–265V AC input operation (Universal input)
✔ Highly efficient – up to 90% efficiency possible
✔ Low EMI, low heat, and reduced external components
✔ Programmable current limit and soft start
✔ Adjustable switching frequency for EMI optimization
✔ Auto-restart for fault conditions
✔ Built-in protection:
 • Over-voltage Protection (OVP)
 • Under-voltage Lockout (UVLO)
 • Over-temperature Protection (OTP)
 • Short Circuit & Overload protection

🛠 Technical Specifications:

🎯 Typical Applications:

🔹 AC-DC SMPS (12V/24V/5V/48V)
🔹 Mobile and Laptop Chargers
🔹 Battery Chargers (Lead-Acid, Li-ion, SMPS)
🔹 Industrial Power Supplies
🔹 LED Drivers & Lighting SMPS
🔹 Set-Top Boxes, TV Power Modules
🔹 Communication & Networking Equipment

💡 Why Designers Prefer TOP261EN:

✔ Reduces external components (low BOM cost)
✔ High efficiency & low heat – fewer heatsinks required
✔ EMI-friendly design simplifies certification
✔ Excellent reliability for industrial and consumer applications
✔ Supports wide input for global usage (US, EU, India, etc.)