The INN2004K-TL is an offline quasi-resonant flyback power supply IC from Power Integrations’ InnoSwitch3-EP family. This IC incorporates a primary-side controller, a secondary-side controller, and a high-voltage MOSFET in a single package. The InnoSwitch3-EP architecture employs FluxLink feedback technology, enabling highly accurate and reliable performance while maintaining reinforced isolation.

Applications:

• Adapters and chargers for mobile devices, set-top boxes, and appliances.
• Auxiliary power supplies in industrial equipment.
• Open frame power supplies.

Features:

• Quasi-Resonant (QR) Operation: Optimizes efficiency across the load range, reducing switching losses and improving thermal performance.
• Integrated High-Voltage MOSFET: Simplifies design and reduces component count.
• FluxLink Feedback Technology: Provides accurate secondary-side control with reinforced isolation, eliminating optocouplers.
• Precise Secondary-Side Regulation: Ensures stable output voltage regulation, even under varying load and line conditions.
• Advanced Protection Features: Includes over-voltage protection (OVP), over-current protection (OCP), over-temperature protection (OTP), and short-circuit protection (SCP) for enhanced system reliability.
• EcoSmart Energy Efficiency: Exceeds global energy efficiency standards.
• Frequency Jittering: Reduces EMI emissions for improved electromagnetic compatibility.

Benefits:

• High Efficiency: Quasi-resonant operation and integrated MOSFET contribute to high energy efficiency, reducing power consumption and heat generation.
• Simplified Design: Integration of multiple functions into a single package simplifies the power supply design process.
• Enhanced Reliability: FluxLink feedback technology and comprehensive protection features ensure reliable operation and long product lifespan.
• Reduced Component Count: Integrated components minimize the number of external components required, saving cost and board space.
• Improved EMI Performance: Frequency jittering reduces EMI emissions, simplifying compliance with regulatory standards.

Additional Details:

The INN2004K-TL is available in a compact surface-mount package. It is designed for applications requiring up to approximately 25W of output power, depending on input voltage and thermal conditions. The device is optimized for use with a wide range of input voltages, typically from 85 VAC to 265 VAC. It also features automatic restart capability in the event of a fault condition. Detailed specifications, including operating temperature range, switching frequency, and package dimensions, can be found in the official Power Integrations datasheet.