LNK4115D-TL

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The LNK4115D-TL application field and working principle provide a powerful and versatile solution for AC/DC power conversion, offline switching and more. The device works in a buck-boost configuration to provide a highly efficient, power source tailored to the needs of the application.
The AC/DC conversion of the device is based on a synchronous buck-boost converter topology that allows for a wide range of input voltages and an output voltage that is adjustable from 0V to 42V. The device operates in a fixed frequency mode of up to 2MHz and offers a wide range of line and load regulation for many types of applications. The device also has an integrated overvoltage protection circuit that protects against overvoltage conditions by preventing additional current from flowing into the output when the voltage exceeds the predefined level.
The LNK4115D-TL also offers an integrated synchronous rectifier that improves efficiency by maximizing the output current and minimizing conduction losses. This enables the device to achieve efficiencies of up to 95% while still providing high performance and reliable operation. Additionally, the device includes an active bridge rectifier, which can be configured to boost the input rectification when working in a high frequency mode, increasing the output current and enabling the device to support a wide range of applications that require a high current output.
In terms of offline switching, the LNK4115D-TL provides a high-efficiency low power startup current, typically at 2mA with certain boost output voltages, in order to allow a fast, economical and efficient source of power on power down. This eliminates the need for large capacitors, which reduces system cost. The device is also equipped with a load-dependent standby current feature, which reduces power dissipation when the load is disconnected by allowing the device to enter a low current Idle mode and thus reducing the energy consumption of the system.
Another example of the versatility of the device is its flexibility in controlling external components. Its startup/power-down sequencing, low offset current source, and various fault management options allow for optimized power up and power down sequencing. Additionally, the device features a wide range of protection features to ensure safe operation, including output-overvoltage protection, output-undervoltage protection and thermal shutdown.

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