LNK574DG-TL

AC DC Converters, Offline Switchers Overview

The LNK574DG-TL is a LinkZero-LP family AC/DC converter IC from Power Integrations, designed for low-power offline applications. It integrates a high-voltage switch and control circuitry in an SO-8C package. The device supports universal input voltages of 85 V to 265 VAC. It delivers a maximum output power of 3 W with a minimum supply voltage of 50 V. The internal oscillator operates at a switching frequency of 100 kHz with a maximum duty cycle of 63%. Quiescent current is limited to 250 uA, and the output current capability reaches 375 mA. It functions within a temperature range of -40°C to +150°C.

AC DC Converters, Offline Switchers Feature Summary

• Integrates primary-side regulation for simplified design without optocouplers
• Features EcoSmart technology for ultra-low no-load power consumption
• Includes frequency jittering to reduce EMI filter costs
• Provides comprehensive protection including thermal shutdown and auto-restart

AC DC Converters, Offline Switchers Applications

• Mobile phone and PDA chargers
• Power supplies for cordless tools
• MP3 and portable audio device chargers
• Electric shaver adapters

AC DC Converters, Offline Switchers Procurement Notes

Verify that the component matches the specific manufacturer part number LNK574DG-TL and confirms compliance with RoHS standards. Ensure the supplier provides valid traceability documentation and original manufacturer packaging seals. Cross-reference the ordering suffix TL with official datasheets to confirm reel or cut tape specifications. Validate that the received units correspond to the specified SO-8C package and silicon technology before integration into production lines.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring minimal external components and strict standby power limits. It is suitable for cost-sensitive applications where transformer size reduction is prioritized. The integrated high-voltage switch simplifies layout compared to discrete solutions. Consider its 100 kHz frequency for balancing efficiency and electromagnetic interference requirements in compact enclosures.

AC DC Converters, Offline Switchers Part Context

This device belongs to the LinkZero-LP series, representing an evolution of the LinkSwitch-LP family. It incorporates advanced techniques to achieve near-zero no-load power consumption while maintaining precise voltage regulation. The series targets global energy efficiency regulations by eliminating the need for additional startup circuits and reducing system component count.

AC DC Converters, Offline Switchers Replacement Considerations

The LNK576DG-TL serves as a higher power alternative within the same LinkZero-LP family, offering up to 8 W output capability. Designers upgrading from older LinkSwitch-LP variants can utilize this part for improved no-load performance without significant topology changes.