LNK6775K-TL

AC DC Converters, Offline Switchers Overview

The LNK6775K-TL is a LinkSwitch-HP AC/DC converter IC from Power Integrations, designed for high-efficiency offline power supplies. It integrates a primary-side regulation controller and a high-voltage power MOSFET 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 an input voltage range of 85 VAC to 265 VAC, delivering up to 26 W output power. The quiescent supply current is 1.1 mA, and it functions within a temperature range of -40°C to +125°C.

AC DC Converters, Offline Switchers Feature Summary

• Integrates primary-side regulation (PSR) controller and high-voltage power MOSFET to eliminate optocouplers and secondary control circuits.
• Features multi-mode control for EcoSmart efficiency, achieving low no-load power consumption and high efficiency across the entire load range.
• Includes comprehensive protection mechanisms such as output short-circuit protection (SCP), over-current protection (OCP), and over-temperature protection (OTP).
• Supports programmable current limit points and offers selectable hysteresis or latching options for overvoltage and overtemperature protection.

AC DC Converters, Offline Switchers Applications

• LCD monitors and televisions
• External adapters and chargers
• Appliances and embedded power supplies
• Industrial control systems

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'K' indicates the selected current limit point configuration, as this parameter varies by part number variant. Confirm the 'TL' suffix corresponds to the tape and reel packaging format required for automated assembly processes. Ensure the eSOP-12B package compatibility matches the target PCB footprint and thermal management design specifications.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring precise constant voltage regulation without secondary feedback loops. The 132 kHz switching frequency allows for reduced transformer size compared to lower-frequency alternatives. Consider the available current limit programming options to match the specific overload requirements of the application while maintaining system reliability under varying line conditions.

AC DC Converters, Offline Switchers Part Context

This device belongs to the LinkSwitch-HP family, which focuses on high-power density and high-efficiency AC/DC conversion. Unlike standard LinkSwitch parts, the HP series offers tighter CV accuracy and enhanced protection features. It serves as a cost-effective solution for replacing complex discrete switcher designs in medium-power applications.

AC DC Converters, Offline Switchers Replacement Considerations

Direct replacements within the same family include LNK6776K and LNK6777K, which share similar pinouts but offer different current limit settings. Verify that any substitute maintains the eSOP-12B package and compatible thermal characteristics to ensure seamless integration into existing hardware layouts.

AC DC Converters, Offline Switchers FAQ

How does the LNK6775K-TL achieve regulation without an optocoupler?

It utilizes Primary-Side Regulation (PSR) technology, which senses the output voltage through an auxiliary winding on the transformer during the off-time of the power switch.

What is the purpose of the 'K' suffix in the part number?

The 'K' suffix denotes a specific internal current limit point setting, allowing designers to program the overload power capability for different application requirements.