LNK4323D-TL

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PMIC (Power Management Integrated Circuits) is an electronic device which is mainly used to control the electrical power going to a device. A PMIC is usually used with integrated circuits and is sometimes called a power chip. AC/DC converters, offline switchers, and other power-management components are included in PMICs. Virtually all modern electronics use PMICs.

The LNK4323D-TL is a PMIC optimized for off-line isolated AC/DC applications. It provides a comprehensive solution with internal MOSFETS, X-Cap, and active clamp circuit. The device includes a hysteretic control scheme to provide power savings, and offers over-voltage, over-temperature, and over-current protection features.

The LNK4323D-TL is suitable for applications that require a wide input and output voltage range, such as medical equipment, industrial/commercial systems, and appliances. The device\'s low cost and ease of integration makes it suitable for parts in high volumes of applications.

The working principle of the LNK4323D-TL is based on a hysteretic control theory. This is a closed-loop control method which relies on a setting of target voltage. The topology is then compared to the target voltage, and when the difference is above the hysteresis threshold an output is triggered.

The LNK4323D-TL works on a fixed 810 kHz switching frequency which reduces the inductor size, helps reduce emissions, and reduces the ripple of the output voltage. The device also has a peak current mode which provides excellent performance and improved line/load regulation.

The LNK4323D-TL comes with features such as an enable (EN) pin, an over-voltage protection (OVP) pin, an over-temperature protection (OTP) pin, and a frequency synchronization (FSYNC) pin. The EN pin is used to enable or disable the device, the OVP pin is used to detect an over-voltage condition, and the OTP pin is used to detect an over-temperature situation. The FSYNC pin is used to synchronize the device with an external signal.

The device also has an active clamp feature which helps reduce the risk of failure by limiting the output voltage and reducing the voltage stress on the MOSFET. The active clamp feature reduces the overall power dissipation, which provides better system-level reliability.

The LNK4323D-TL is a cost effective solution for off-line AC/DC applications. Its hysteretic control scheme provides high power efficiency, and it has various protection features. Its low cost and ease of integration makes it a suitable choice for high volume applications.

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