LNK6427K

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The LNK6427K is an integrated and high performance off-line switching regulator that features a low power standby mode, adjustable output, and high efficiency. This device combines all primary functions required in an AC-DC converter: pre-regulated PWM controller, Universal inputs, power MOSFETs, Start-up circuitry, Frequency Jitter, Over-current protection, Internal compensation, and Cycle-by-Cycle Current Limit. It is applicable to most of the AC/DC or DC/DC converter applications, such as: computers, TVs, Washing Machine, Air Conditioner etc. The LNK6427K is an offline switcher IC that can be used in AC to DC and DC to DC converter designs. It is a flexible and cost effective component for applications in the industrial, commercial, and consumer area.

The working principle of LNK6427K is highly efficient, low component count, cost effective, and easy to use solution. The device comprises a main power switch controller with an integrated 600V, 3A MOSFET and undervoltage lockout, allowing it to generate an optimized and efficient regulation of an output voltage, making it suitable for medium power applications. When an input voltage is applied, the integrated low-side MOSFET will start the power supply and switch the current to the output stage, which is regulated in order to achieve the desired output voltage. At the same time, an integrated Frequency Jitter (periodic switching at up to 60kHz) reduces EMI/RFI noise. When the output load is low, the device is switched to stand-by mode and the power consumption is reduced to a minimum.

The LNK6427K device offers a high-efficiency solution that is ideal for cost-sensitive offline switching applications. It features multiple protections, small foot print, low component count and support for both fixed and adjustable output voltage implementation. The device is designed to meet the stringent requirements of modern AC/DC and DC/DC applications, such as computers, TVs, Washing Machine, Air Conditioner etc. Furthermore, this device supports an innovative start-up circuitry to reduce the risk of output overvoltage and to ensure a reliable start-up. An integrated power slave can be used to control the power output of the IC, and the IC can be connected to a microcontroller or processor for further enhanced functionality. For example, it can be used to quickly switch on and off the power output, or adjust the output voltage to suit the load requirements.

The LNK6427K is a highly efficient, integrated and simple to use offline switching regulator that provides low component count and cost effective solutions for commercial, industrial and consumer applications. This device provides various protection functions, flexible output voltage, and many integration features to simplify the design and make it suitable for a wide range of AC/DC and DC/DC offline systems. It is the ideal choice for low power offline switching applications.

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