LNK6668K

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The LNK6668K is a monolithic, high frequency switched-mode power supply (SMPS) controller intended as a cost-effective replacement for discrete solutions. It is designed to operate with a wide range of input power sources, typically 3V up to 72V, and suitable for low output power applications such as that of off-line, standby and low power computing and consumer applications. The LNK6668K belongs to the family of PMIC (Power Management ICs) - AC DC Converters, Offline Switchers.

The LNK6668K utilizes Pulse-width Modulation (PWM) Control which is an efficient way of controlling the power output of various electrical devices. In this type of control, the output voltage or current is varied by controlling the flow of pulses, which in turn control the frequency of the output voltage or current.

LNK6668K works on a simple principle. It features an on-chip oscillator that produces fixed or variable frequency output pulses. These pulses are then processed by an internal voltage regulator, thus providing an overall better power efficiency.

Additionally, the LNK6668K has a number of helpful features that help to optimize the performance and application of the device and provide an overall improved power efficiency. One of these features is the built-in current-mode PWM control circuit with frequency jittering. This helps reduce on-time distortion, which is an issue when controlling following the on-time of switching transistors. Reducing on-time distortion allows the LNK6668K to achieve high system reliability and better immunity to external interference such as noise, temperature, and load variation.

The LNK6668K also features an adjustable soft-start function, which is important for reducing inrush current at startup. This is beneficial for protecting the device from damage during long term operation. The LNK6668K also includes a Zero-voltage (ZVS) switching protection to reduce switching noise and RF interference. This is important for ensuring that the AC input is not over-loaded during startup.

The LNK6668K can be used in many applications including, but not limited to, LED (light-emitting diode) lighting, battery-powered equipment, telecommunications systems, industrial control systems, household appliances, and motor control equipment. It is also suitable for automotive, medical and telecom applications.

Overall, the LNK6668K is a highly efficient SMPS controller for use in a wide range of applications. It provides a cost-effective alternative to discrete solutions and can bring significant savings in energy costs. With its on-chip oscillator, current-mode PWM control circuit, adjustable soft-start function and built-in ZVS switching protection, the LNK6668K is an excellent choice for a range of low output power applications.

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