LNK4215D-TL

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The LNK4215D-TL is a high-performance AC/DC converter from Power Integrations, offering good efficiency and long-term reliability. It is a cost-effective solution for the replacement of linear regulators and low-cost power supplies when the power consumption requirement is low. The integrated solution has been designed to provide a significant improvement over traditional approaches, reducing the number of external components, saving space and power, and reducing the overall cost of ownership.

The LNK4215D-TL operates as a flyback power supply, with an integrated bridge rectifier. Its primary purpose is to provide regulated DC power from an AC input. It is typically used in applications where a regulated DC voltage is required from an available AC line voltage. Examples of such applications include low-power, high-voltage AC/DC converters, such as those used in personal electronic devices, or in portable DC/AC inverters.

The primary application field for the LNK4215D-TL is for use as an offline switcher in applications requiring a small, low-cost, easy-to-implement power supply solution. The device can be used to generate either fixed or variable output voltages, and has a wide operating temperature range, making it well-suited for use in both conventional and extreme environmental conditions. The device is also designed to provide high efficiency over a wide load range, up to a maximum of 0.50mA.

The LNK4215D-TL offers very good performance with a minimal number of external components. It features an advanced, proprietary primary-side control scheme, eliminating the need for a secondary-side controller to regulate the output voltage. The integrated switch also has an integrated soft-start feature, ensuring a controlled output voltage start-up. In addition, the device also offers over-voltage, over-current and over-temperature protection, offering improved reliability for the power supply.

The operating principle of the LNK4215D-TL is as follows. When the AC line input is applied, the integrated bridge rectifier converts the input voltage to a DC voltage, which is then passed through a single switch to the primary winding of the transformer. The switch is then controlled by the integration primary side controller, which senses the voltages at the input and the output, and drives the switch for regulation. In this way, the output voltage is regulated to the desired value. The output voltage of the transformer is then rectified, filtered and regulated in order to obtain the required DC output voltage.

In conclusion, the LNK4215D-TL is a high-performance AC/DC converter from Power Integrations offering good efficiency and long-term reliability. It is designed to provide a significant improvement over traditional approaches, saving space, power, and reducing the overall cost of ownership. Its primary application field is for use as an offline switcher in applications requiring a small, low-cost, easy-to-implement power supply solution, and it can generate either fixed or variable output voltages with high efficiency. It operates using an advanced, proprietary primary-side control scheme, and is protected from over-voltage, over-current and over-temperature.

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