LNK6415D

AC DC Converters, Offline Switchers Overview

The LNK6415D is a LinkSwitch-3 AC/DC converter from Power Integrations, designed for low-power constant voltage and constant current charger applications. It integrates a 725V power MOSFET, an ON/OFF control state machine, and a high-voltage switched current source into a single package. The device eliminates the need for optocouplers and secondary circuitry while providing accurate output voltage regulation and current flow control. It features a programmable switching frequency of up to 85 kHz to minimize transformer size and compensates for transformer inductance tolerances, input line variations, and cable voltage drops.

AC DC Converters, Offline Switchers Feature Summary

• Eliminates optocoupler and secondary circuitry requirements through integrated primary-side regulation
• Provides accurate output voltage regulation and controlled current flow via novel ON/OFF control state machine
• Compensates automatically for transformer inductance tolerances, input line voltage variations, and cable voltage drop

AC DC Converters, Offline Switchers Applications

• Low power CV/CC charger designs
• Universal input AC/DC conversion systems
• Applications requiring compact transformer sizes

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'D' corresponds to the required tape-and-reel packaging configuration. Confirm that the 725V MOSFET rating and 85 kHz maximum switching frequency align with the target transformer design constraints. Ensure the application does not require isolated feedback, as this device operates without an optocoupler.

AC DC Converters, Offline Switchers Selection Notes

Select the LNK6415D when designing low-power chargers that benefit from reduced component count by removing secondary side components. Consider this part for applications where transformer size reduction is critical due to the programmable frequency capability. Verify that the load requirements fit within the constant voltage and constant current operating modes supported by the internal control state machine.

AC DC Converters, Offline Switchers Part Context

This component belongs to the LinkSwitch-3 family from Power Integrations. The family utilizes a proprietary control technique to simplify AC/DC converter designs. Unlike previous generations, LinkSwitch-3 devices integrate the power switch and controller on a single chip, enabling high reliability and reduced board space usage in low-power offline applications.

AC DC Converters, Offline Switchers Replacement Considerations

Check official substitution lists for other LinkSwitch-3 variants such as LNK6406D or LNK6416D if pin compatibility or specific power levels differ. Verify that any replacement maintains the 725V breakdown voltage and similar control architecture.