LNK3771D-H004-TL

AC DC Converters, Offline Switchers Overview

The LNK3771D-H004-TL is a high-efficiency off-line constant voltage flyback switcher IC from Power Integrations. It integrates a 725 V / 900 V primary MOSFET and supports synchronous rectification for enhanced performance. The device operates at a switching frequency of 66 kHz and accepts an input supply voltage range of 85 V to 265 V. It delivers a maximum output power of 6.0 W in open-frame universal input configurations and up to 7.0 W at 230 VAC. This component is designed for isolated power management applications requiring low no-load power consumption.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a high-voltage primary MOSFET rated for 725 V or 900 V operation within a single package.
• Supports synchronous rectification topology to improve conversion efficiency and reduce thermal stress.
• Features optimized control circuitry for low no-load power consumption in standby modes.

AC DC Converters, Offline Switchers Applications

• Isolated AC-DC power supplies
• Offline flyback converter designs
• Secondary side synchronous rectification circuits

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix (H004) against official datasheets to confirm pinout and electrical characteristics, as variations exist within the LinkSwitch-XT2SR family. Ensure compatibility with the required isolation voltage and thermal management requirements for the target application. Cross-reference ordering information with authorized distributors to avoid counterfeit components.

AC DC Converters, Offline Switchers Selection Notes

Select this IC for applications requiring high efficiency and low no-load power in small form-factor power supplies. The integrated MOSFET simplifies design by reducing component count. Consider the 66 kHz switching frequency for EMI filtering requirements. Verify that the 725 V/900 V rating meets the peak voltage stresses of the specific transformer design.

AC DC Converters, Offline Switchers Part Context

This part belongs to the LinkSwitch-XT2SR family, which combines advanced control logic with integrated power MOSFETs. It is designed for cost-effective, high-performance offline power conversion. The series targets consumer electronics and appliance adapters where size and efficiency are critical constraints.

AC DC Converters, Offline Switchers Replacement Considerations

Check for direct substitutes within the same LinkSwitch-XT2SR family, such as the LNK3771D-H006-TL, ensuring voltage ratings and power capabilities match the design requirements. Verify pin-to-pin compatibility before substitution.