LNK408EG

LED Driver IC Overview

The LNK408EG is a high-voltage integrated switch from the LinkSwitch-2 family, designed for offline flyback power supplies. It integrates a 700 V MOSFET, high-voltage current source, oscillator, and control circuitry. The device operates at a fixed switching frequency of 132 kHz with frequency jitter to reduce EMI. It supports universal AC input ranges from 85 VAC to 265 VAC. Key electrical parameters include an output power capability up to 15 W, a breakdown voltage of 700 V, and an operating temperature range from -40 °C to +150 °C.

LED Driver IC Feature Summary

• Integrates a 700 V silicon MOSFET with advanced protection features including overcurrent limiting and thermal shutdown.
• Utilizes proprietary EcoSmart technology to achieve ultra-low standby power consumption in compliance with global energy efficiency standards.
• Features a fixed-frequency operation with inherent frequency jitter to minimize electromagnetic interference without requiring complex filtering components.

LED Driver IC Applications

• Adapters and chargers for mobile phones and portable electronics
• Low-power consumer appliances and household devices
• Battery chargers for cordless tools and toys

LED Driver IC Procurement Notes

Verify the specific package variant (e.g., DIP-7 or SO-8) against the required PCB footprint and thermal management strategy. Confirm that the selected revision matches the design requirements for line regulation and load regulation performance. Ensure compatibility with the intended transformer design parameters before finalizing procurement orders.

LED Driver IC Selection Notes

Select this component for designs requiring a minimal external component count and robust protection mechanisms. It is suitable for applications where cost-effective implementation of isolated flyback topologies is prioritized. Consider the thermal dissipation capabilities of the chosen package when determining maximum power output limits under varying ambient conditions.

LED Driver IC Part Context

This part belongs to the LinkSwitch-2 family, which represents a generation of highly integrated offline switcher ICs. These devices are engineered to simplify power supply design by combining power switching and control logic into a single monolithic structure. The family is widely recognized for its reliability and ease of use in low-to-medium power applications.

LED Driver IC Replacement Considerations

Compatible substitutes within the same manufacturer's portfolio include the LNK404DG through LNK407DG series for lower power requirements, or the LNK409DG for higher power needs. Cross-family replacements such as the TOP244YN may be considered but require redesign of the control loop and transformer specifications due to differences in control architecture.