LNK500G

AC DC Converters, Offline Switchers Overview

The LNK500G is a LinkSwitch-IC from Power Integrations, designed as an extremely simple circuit configuration for primary-side regulated AC-DC converters. It integrates a high-voltage switching MOSFET with a precision controller to provide a complete CV/CC solution in a single package. This integration reduces the secondary side component count by 10 to 20 parts, significantly lowering system costs and enabling compact form factors. The device supports full input voltage ranges for global use and offers system-level overheat protection and current limiting.

AC DC Converters, Offline Switchers Feature Summary

• Integrates primary-side control and high-voltage switching into a single low-pin-count package
• Eliminates the need for optocouplers and secondary-side feedback components
• Provides precise constant voltage and constant charging regulation
• Includes built-in system-level thermal protection and current limiting

AC DC Converters, Offline Switchers Applications

• Mobile phone and wireless telephone chargers
• PDA and digital camera power adapters
• MP3 player and portable audio equipment chargers
• Razor and small appliance power supplies
• TV standby and auxiliary power supplies

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix (e.g., G) against the manufacturer's official datasheet to confirm pinout compatibility and lead-free status. Ensure the ordering part number matches the required package type and tape/reel specifications. Cross-reference the date code and lot traceability requirements with your supply chain standards before finalizing procurement orders.

AC DC Converters, Offline Switchers Selection Notes

Select the LNK500G for cost-sensitive applications requiring a linear-like CC tolerance of ±25%. It serves as a direct replacement for linear solutions in systems under 4W. Consider this part when minimizing bill-of-materials complexity is prioritized over tight voltage regulation tolerances found in higher-end LinkSwitch variants.

AC DC Converters, Offline Switchers Part Context

The LNK500G belongs to the LinkSwitch family, which combines a high-voltage power MOSFET with a precision controller in a single surface-mount package. This series targets low-power offline flyback converters, offering a highly integrated alternative to discrete controller and switch combinations. The family emphasizes simplicity and reduced component count for consumer electronics.

AC DC Converters, Offline Switchers Replacement Considerations

No direct pin-to-pin replacement exists for the TOP414GN according to public records; however, the LNK500G is not a substitute for that specific legacy part. For existing LNK500 designs, verify if newer LinkSwitch-III or LinkSwitch-TN families offer improved efficiency or tighter tolerances while maintaining compatible footprints.