LNK305GN-TL

AC DC Converters, Offline Switchers Overview

The LNK305GN-TL is an AC-DC converter from the LinkSwitch-TN family, designed for offline flyback, buck, and buck-boost topologies. It integrates a 700V power switch with a high-voltage current source for startup and operation. Key electrical parameters include a maximum input voltage of 374V DC, a switching frequency of 66 kHz, and a maximum duty cycle of 72%. The device supports output currents of 175 mA in MDCM and 280 mA in CCM modes. It operates within a junction temperature range of -40°C to 150°C and features built-in protection against overcurrent, open-loop, overtemperature, and short-circuit conditions.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a 700V power switch with a high-voltage current source for simplified design
• Includes proprietary Cycle-by-Cycle Current Limit and thermal shutdown for robust protection
• Supports multiple operating modes including MDCM and CCM for optimized efficiency
• Features fixed switching frequency to minimize EMI filter requirements

AC DC Converters, Offline Switchers Applications

• Adapters and chargers for consumer electronics
• Standby power supplies for appliances
• General-purpose isolated DC-DC converters

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'TL' indicates tape-and-reel packaging when sourcing components. Confirm RoHS compliance status as per the latest manufacturer documentation, as environmental standards may update. Ensure the ordering part number matches the required package variant, typically SMD-8, to guarantee physical compatibility with existing PCB footprints.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring low standby power and minimal external component count. It is suitable for applications where cost-sensitive, high-volume production demands integrated protection features. Consider the 66 kHz switching frequency for balancing EMI performance and transformer size. Evaluate thermal management requirements given the 150°C junction temperature limit.

AC DC Converters, Offline Switchers Part Context

The LNK305GN-TL belongs to the LinkSwitch-TN family, which replaces traditional PWM controllers and discrete power switches. This integration reduces bill-of-materials costs and board space. It is the active replacement for the discontinued LNK305G, offering improved availability and updated packaging options while maintaining similar electrical characteristics and pinout compatibility.

AC DC Converters, Offline Switchers Replacement Considerations

The LNK305GN-TL serves as a direct replacement for the obsolete LNK305G. Verify that the legacy part was non-RoHS compliant if environmental regulations apply to the new assembly.