LNK3205D-TL

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The LNK3205D-TL belongs to the family of AC DC converter, offline switchers. It is a high efficiency switched-mode power supply (SMPS) controller with a few additional features making it capable of more advanced applications than basic SMPS controllers. This makes it ideal for applications such as external power supplies, battery chargers, high frequency SMPS, off-line SMPS and solar powered applications.

LNK3205D-TL is specifically designed for high efficiency applications, achieving up to 95% efficiency and coming fully integrated with features such as high voltage startup circuit, line under-voltage and over-voltage lockout, current limit, over-temperature protection, line regulation, over-temperature protection, constant current and constant voltagelimits, as well as integrated freewheeling diode.

LNK3205D-TL can accept an input of up to 100V under normal conditions. For higher voltage applications, a line voltage start-up circuit allows for it to work at up to 370V AC. A safety-enable pin is available and connected to the AC input to ensure full safety. The operating temperature range is from -40ºC to 125ºC, allowing for the device to be used in extreme environments.

The LNK3205D-TL uses a few operation principles that enables it to achieve its outstanding performance. First is its two-stage topology, which consists of an AC-to-DC rectified-bridge-based input DC/DC converter and a high-frequency current mode DC/DC converter and an output driver. This two-stage topology allows for a wide range of input pulse-width modulation duty cycle and a wide output power range.

The device also has a few protection features that help ensure its performance over a wide range of conditions. Over-temperature protection will disconnect the output automatically to prevent any damage to the device or overloading, while the over-current protection will limit the output current to a predetermined amount if the current is too high.

The output voltage is controlled by sensing current, which is switched between the output and a feedback pin. The device also has a built-in frequency oscillator and duty cycle generator, which can be adjusted to adjust the output power. The duty cycle can be controlled with a duty cycle adjustment pin.

Other features of the LNK3205D-TL include bi-directional current sensing, current limiting, and short-circuit protection. The device is designed for use in applications such as battery chargers, external power supplies, high frequency SMPS, off-line SMPS and solar powered applications.

In conclusion, the LNK3205D-TL is a great choice for applications requiring high efficiency and advanced features. Its two-stage topology, safety-enable pin, adaptive frequency and duty cycle generator, over-temperature protection and other features make it an ideal option for many types of high efficiency power converters.

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