LNK615PG

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The LNK615PG is an Integrated Offline Switcher IC with a wide range of applications. It provides a complete power solution in applications such as AC/DC, isolated DC/DC converters, auxiliary power supplies, LED lighting and linear power supplies. The device offers a great balance of input voltage, output voltage, power, and efficiency.

The LNK615PG features a powerful, low-cost, efficient offline switcher with excellent circuit protection features. It includes high accuracy current limit, thermal shutdown and over voltage protection for the device and its associated electronic components. It also provides a comprehensive monitoring and control interface with the ability to detect load current, temperature and open/short conditions.

The LNK615PG is designed to convert AC mains voltage into stable DC output with very high efficiency and low ripple voltage. It has high power density, low component count, low cost and low power dissipation. It is capable of operating normally with a wide range of AC input voltages ranging from 85VAC to 264VAC with frequency range from 47Hz to 63Hz.

The basic working principle of the LNK615PG is quite simple. It consists of power factor correction (PFC) circuit, a primary switcher, a secondary switcher and its associated control circuitry. The PFC circuit is used to achieve a nearly perfect sine wave input current, while the primary switcher is used to convert AC input voltage into a high frequency output voltage. The secondary switcher takes this high frequency output voltage and rectifies it to form a DC output voltage.

The primary switcher performs its task by using MOSFETs and control circuitry. The MOSFETs are used to switch the voltage on and off at a high frequency. The control circuitry is responsible for the timing and the switching of the MOSFETs. The output is then filtered and stabilized by the secondary switcher. This switcher also contains the control circuit to regulate the output voltage and current.

The PFC circuit regulates the peak value of the current drawn from the input line and ensures that the output voltage follows the input voltage despite the fluctuation in input voltage. The PFC circuit is capable of operating up to 98% efficiency in some applications. This provides high efficiency and delivers high power density with minimal heat emission.

The LNK615PG also features a comprehensive monitoring and protection interface. This includes an over-voltage protection (OVP) circuit to monitor and shut down the output voltage if it rises above the normal operating voltage. It also includes an over-current protection (OCP) circuit to detect excessive current on each channel and then shut it down in order to prevent component damage. This feature helps to increase the life span of the device and its associated components.

The LNK615PG is a highly integrated device which enables a wide range of applications. It is designed to meet the specific requirements of AC/DC and DC/DC applications like LED lighting, portable power, UPS systems, auxiliary power supplies and linear power supplies. It offers the best combination of reliability, power density and cost effectiveness for high-power AC/DC offline applications.

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