INN2104K-TL

AC DC Converters, Offline Switchers Overview

The INN2104K-TL is a LinkSwitch-III family AC/DC converter IC designed for offline flyback applications. It integrates a 700V power switch, high-voltage current source, oscillator, programmable constant voltage and constant current controllers, thermal shutdown, and cycle-by-cycle current limit. The device operates from an internal high-voltage current source, eliminating the need for a bias winding. It supports universal input voltages and offers fixed switching frequencies of 66 kHz or 132 kHz to optimize transformer size and EMI performance.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a 700 V power MOSFET with primary-side regulation for simplified design
• Includes programmable constant voltage and constant current control loops
• Features thermal shutdown and cycle-by-cycle current limiting for robust protection

AC DC Converters, Offline Switchers Applications

• Universal input adapters for consumer electronics
• Battery chargers for portable devices
• Standby power supplies for appliances

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix (e.g., K) against the manufacturer's latest datasheet to confirm the exact switching frequency option and package variant. Ensure the ordering part number matches the required pin configuration and thermal characteristics for your PCB layout. Cross-reference the manufacturer's official documentation for any recent revisions or obsolescence notices before finalizing procurement.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring high integration and minimal external components in low-to-medium power applications. The integrated 700 V switch and primary-side regulation reduce bill of materials cost. Consider the available switching frequency options to balance between transformer size and electromagnetic interference requirements for the target application.

AC DC Converters, Offline Switchers Part Context

This part belongs to the LinkSwitch-III family from Power Integrations, which focuses on highly integrated solutions for offline power supplies. The series is known for combining power switching and control functions into a single package, enabling compact designs for adapters and chargers without requiring optocouplers or secondary-side feedback circuits.

AC DC Converters, Offline Switchers Replacement Considerations

Check for direct replacements within the LinkSwitch-III family that may offer different switching frequencies or slightly adjusted power ratings. Verify pin compatibility and thermal performance if substituting with older LinkSwitch-TN or newer InnoSwitch families.