LNK615DG

AC DC Converters, Offline Switchers Overview

The LNK615DG is a LinkSwitch-II family AC/DC converter IC designed for off-line flyback power supplies. It integrates a high-voltage MOSFET and controller in an SO-8C package. Key electrical parameters include a maximum output power of 5.1 W, a switching frequency of 65 kHz, and a drain-source breakdown voltage of 700 V. The device operates with a supply voltage range of -300 mV to 9 V and supports a maximum duty cycle of 55%. It delivers an output current of 504 mA and features a quiescent operating current of 480 uA. The component functions within a temperature range of -40°C to +150°C.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a high-voltage power MOSFET and control logic into a single compact package.
• Provides constant voltage and constant current regulation capabilities for isolated flyback converters.
• Includes proprietary Cycle-by-Cycle Current Limiting and thermal shutdown protection mechanisms.

AC DC Converters, Offline Switchers Applications

• Adapters and chargers for consumer electronics
• Standby power supplies for appliances
• General-purpose low-power offline power conversion

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix (e.g., DG) against the manufacturer's datasheet to confirm the package type and tape-and-reel specifications. Ensure the ordering part number matches the required RoHS compliance status and marking changes documented in recent Product Change Notices. Cross-reference the manufacturer's official catalog to confirm current production status and availability channels.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring integrated high-voltage switching without external gate drivers. The fixed 65 kHz switching frequency simplifies transformer design compared to variable-frequency alternatives. Consider the 700 V drain rating when selecting primary side components for higher input voltage ranges or transient conditions. Evaluate thermal performance requirements given the 5.1 W power capability in the SO-8C package.

AC DC Converters, Offline Switchers Part Context

This device belongs to the LinkSwitch-II series from Power Integrations, which combines a 700 V MOSFET with intelligent control circuitry. It is engineered for cost-sensitive, high-volume applications where board space and component count are critical constraints. The series is widely used in low-power offline switcher designs that require minimal external parts while maintaining regulatory compliance.

AC DC Converters, Offline Switchers Replacement Considerations

Consult the manufacturer's official substitution guide for verified equivalents. Direct pin-compatible replacements may exist within the same LinkSwitch-II family or newer generations such as LinkSwitch-TN2, provided electrical parameters and thermal characteristics align with the original design requirements.