LNK6777E

AC DC Converters, Offline Switchers Overview

The LNK6777E is a LinkSwitch-HP AC/DC converter IC from Power Integrations, designed for high-performance offline power supplies. It integrates a 700 V MOSFET and control circuitry in an eSOP-12B package. The device supports flyback topology with a switching frequency of 132 kHz and a maximum duty cycle of 66%. It operates on a wide input voltage range of 85 VAC to 265 VAC. Key electrical parameters include a maximum output voltage of 50 V, a typical operating supply current of 1.4 mA, and a maximum output current capability of 2.5 A. The component functions within a temperature range of -40 °C to +150 °C.

AC DC Converters, Offline Switchers Feature Summary

• Integrates primary-side regulation to eliminate the need for optocouplers and auxiliary windings.
• Employs enhanced peak current mode PWM control with multi-mode operation for high efficiency.
• Features a built-in 700 V MOSFET and comprehensive protection mechanisms including overvoltage and thermal shutdown.

AC DC Converters, Offline Switchers Applications

• High-efficiency isolated flyback power supplies
• Adapters and chargers requiring strict transient response
• General-purpose AC/DC conversion systems

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'E' against the manufacturer's official datasheet to confirm pinout and functional specifications. Confirm RoHS compliance status and moisture sensitivity level prior to ordering. Ensure the selected package variant matches the intended PCB footprint requirements.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs prioritizing high power density and reduced bill-of-materials count by removing secondary feedback components. Suitable for applications demanding improved transient response without optocoupler latency. Verify that the required output power falls within the device's thermal and electrical limits for the target enclosure.

AC DC Converters, Offline Switchers Part Context

The LNK6777E belongs to the LinkSwitch-HP family, which offers advanced features compared to standard LinkSwitch devices. This series targets high-performance applications where efficiency and transient response are critical. It represents a evolution in integrated AC/DC solutions by combining high-voltage power switching with sophisticated control logic.

AC DC Converters, Offline Switchers Replacement Considerations

Consult official substitution guides for compatible LinkSwitch-HP variants. Verify pin compatibility and thermal performance when considering alternatives from other manufacturers.

AC DC Converters, Offline Switchers FAQ

Does the LNK6777E require an optocoupler for regulation?

No, it utilizes primary-side regulation technology to maintain output voltage accuracy without an optocoupler or auxiliary winding.

What is the maximum drain voltage rating for the internal MOSFET?

The internal MOSFET is rated for a breakdown voltage of 700 V.