LNK6778K-TL

AC DC Converters, Offline Switchers Overview

The LNK6778K-TL is an offline switch from the LinkSwitch-HP family, designed for flyback topology AC/DC converters. It integrates a primary-side regulation controller and a high-voltage power MOSFET in a single package. The device supports an input voltage range of 85 VAC to 265 VAC and delivers up to 68 W at 230 VAC. Key electrical parameters include a switching frequency of 120 kHz to 136 kHz, a maximum duty cycle of 64%, and a breakdown voltage of 725 V. It operates within a temperature range of -40°C to +150°C TJ.

AC DC Converters, Offline Switchers Feature Summary

• Integrates primary-side regulation with +/-5% constant voltage accuracy
• Includes comprehensive protection against overvoltage, overcurrent, and overheating
• Features EcoSmart technology for high efficiency across load ranges
• Utilizes frequency modulation to reduce EMI filter component costs

AC DC Converters, Offline Switchers Applications

• LCD monitors and televisions
• External adapters and chargers
• Appliances and embedded power supplies
• Industrial control systems

AC DC Converters, Offline Switchers Procurement Notes

Verify the suffix TL indicates tape and reel packaging when sourcing. Confirm the K suffix denotes RoHS compliance and halogen-free status. Check current availability as distribution channels may vary. Ensure design inputs match the specified 725V breakdown rating for adequate derating margins.

AC DC Converters, Offline Switchers Selection Notes

Select this model for designs requiring up to 68 W output power with tight voltage regulation. The integrated 725V MOSFET simplifies design compared to lower-rated alternatives. Consider the eSOP-12B package for surface mount applications requiring thermal conduction through the exposed pad.

AC DC Converters, Offline Switchers Part Context

This component belongs to the LinkSwitch-HP series by Power Integrations. It represents an evolution in offline converter ICs, combining control logic and power switching in one compact solution. The series targets high-power applications previously requiring discrete controllers.

AC DC Converters, Offline Switchers Replacement Considerations

Public confirmed substitutes include LNK6778E and LNK6778V. These variants share the same core functionality but differ in package type, specifically eSIP-7C and eDIP-12 respectively.