LNK501P

AC DC Converters, Offline Switchers Overview

The LNK501P is a LinkSwitch family AC/DC converter IC from Power Integrations, designed for low-cost offline applications. It integrates a high-voltage MOSFET and control circuitry in an 8-pin DIP package. The device supports universal input voltages ranging from 85 VAC to 265 VAC. It delivers up to 3 W of output power at 85-265 VAC input and 4 W at 230 VAC input. Key electrical parameters include a fixed 5.6 V output voltage, a maximum output current of 267 mA, and a switching frequency of 42 kHz. The component operates within a temperature range of -40°C to +150°C.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a high-voltage power MOSFET and controller into a single monolithic chip.
• Provides constant voltage and constant current regulation with tight tolerance.
• Includes system-level protection features such as thermal shutdown and cycle-by-cycle current limiting.

AC DC Converters, Offline Switchers Applications

• Battery chargers for mobile phones, PDAs, and digital cameras
• Adapters for portable audio equipment and electric razors
• Standby power supplies for televisions and consumer electronics

AC DC Converters, Offline Switchers Procurement Notes

Verify the suffix 'P' indicates the DIP-8 package variant when ordering. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors. Ensure the specific revision level matches design requirements. Cross-reference the Mouser part number 869-LNK501P for accurate sourcing details. Validate humidity sensitivity classification prior to assembly.

AC DC Converters, Offline Switchers Selection Notes

Select this component for cost-sensitive designs requiring simple circuit configuration. It serves as a direct replacement for linear solutions in applications under 4 W. The integrated nature reduces secondary side component count significantly. Ideal for systems where EMI filtering is already present. Suitable for adapters requiring precise CV/CC characteristics.

AC DC Converters, Offline Switchers Part Context

This part belongs to the LinkSwitch family, which consolidates power switching and control functions. The LNK501 variant specifically targets battery charging applications with defined CC tolerances. It differs from other family members by its optimized performance for standard adapter requirements without bias winding feedback.

AC DC Converters, Offline Switchers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify pin compatibility and thermal characteristics if considering alternative manufacturers.

AC DC Converters, Offline Switchers FAQ

What is the output voltage tolerance for the LNK501P?

The LNK501P offers a constant voltage tolerance of ±20%.

Does the LNK501P require an auxiliary winding?

No, it utilizes primary-side regulation and does not require an auxiliary bias winding.