LNK4003D-TL

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LNK4003D-TL Application Field and Working Principle

The LNK4003D-TL is an energy-efficient flyback switcher IC that can be used in many power requirements. This flyback switcher is used to provide power to both AC and DC solutions while also providing protection besides efficient energy usage. In this article we\'ll discuss the application fields and the working principle of this IC.

Application Fields

The LNK4003D-TL is mostly used for applications such as AC-DC off-line converters and low-power AC-DC circuits. It is widely used in home appliances, lighting solutions, industrial power supplies, and ITE applications. It is designed to fit small size solutions, and it has a low profile due to its small size and complete integration which makes it ideal for IoT solutions. It also has a strictly limited no-load consumption which maximizes efficiency. Moreover, it has a wide voltage range from 8 to 25V, so it can be used in different solutions. It has a low start-up cost and ripple current and also provides a high degree of immunity against EMI.

Working Principle

The working principle of the LNK4003D-TL is based on a floating source topology. The output voltage is managed by the internal error amplifier and the opto-coupler current pulse-width modulation (PWM). The IC will provide an output current sense circuit to monitor the magnitude of the output current and manage it to ensure the load is simultaneously supplied without power losses. The IC has an active and a no-load stand option to minimize power consumption when not in use.

The IC also comes with safety features such as auto restart, thermal shutdown, and short-circuit protect. Its integrated OTP circuit ensures that the IC activates itself for maximum safety in the event of any fault. The fast EMI filter makes it safe for use in AC solutions, and its wide operating temperature range allows for a variety of operations.

Conclusion

The LNK4003D-TL is an efficient and integrated flyback switcher IC that is suitable for solution where AC and DC power is required. It has a comprehensive set of protection features, low start-up cost and ripple current. Its active and no-load power stand by help to minimize energy output while providing exceptional protection. The IC is ideal for ITE, small home appliances and industrial power supplies, making it a great power solution.

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