LNK6408K-TL

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The LNK6408K-TL is a integrated power management IC that can be used in a variety of applications, such as DC/DC converters, offline switchers, and AC/DC converters. This device can provide improved efficiency, enhanced reliability, and decreased design complexity. It also provides a higher degree of integrate flexibility over existing solutions.

Product Overview

The LNK6408K-TL integrates a controller, a power MOSFET, a startup regulator, Advanced Power Source Detection (APSD), a low-power standby regulator, soft-start slew rate control, under-voltage lockout (UVLO), frequency jittering, and a wide variety of features that are designed to keep switch-mode power supplies running properly. The LNK6408K-TL also features a specialized start-up stage mode and quiescent current that is suitable for low-power applications. This IC is designed to deliver exceptionally high efficiency, operating from a low-voltage power source.

Application field

The LNK6408K-TL is ideal for a variety of power management applications. It is particularly suitable for:

• Offline AC/DC converters
• Flyback and forward converters
• Integrated appliance SMPS
• Offline dimmable power supplies
• Battery chargers
• Serial Port Power Supplies

Working Principle

The LNK6408K-TL is designed to convert an AC voltage into a regulated DC voltage. The regulator is based on a switching circuit that operates at the high frequency, usually beyond 100kHz. This allows for very efficient power conversion and is suitable for low-power applications such as laptop adapters and digital circuit boards. The regulator consists of two main components, a metal–oxide–semiconductor field–effect transistor (MOSFET) and a pulse–width modulated (PWM) controller. The MOSFET is used as a switch while the PWM controller is used to regulate the output voltage. The PWM controller can be used to set the maximum output power through the use of an external sense resistor. The sense resistor measures the output current and adjusts the pulse–width accordingly.

The LNK6408K-TL also integrates a startup regulator, Advanced Power Source Detection (APSD) and a low-power standby regulator to provide enhanced reliability and power efficiency of the power supply. The startup regulator is used to provide a stable output voltage during start-up and the APSD is used to detect the power source and automatically switch between the input voltage and the output voltage. The low-power standby regulator ensures a low power consumption and improved efficiency when the power supply is not in use. The device also has a wide range of functions including under-voltage lockout, frequency jittering, over-voltage protection, peak current control, and slew rate control.

In summary, the LNK6408K-TL is an integrated power-management IC that offers a high degree of integration and flexibility in the design of AC/DC converters and other switch-mode power supplies. It is ideal for applications that require high efficiency, reliability, and improved design complexity.

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