LNK6418E

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PMIC (Power Management Integrated Circuit) devices are used to control and regulate the power supply in a variety of applications. LNK6418E is a new type of PMIC that harnesses the power of AC-DC conversion, allowing it to power applications of all sorts in both online and offline scenarios. LNK6418E is a single-switch ac-dc buck (step down) converter with constant current, constant voltage and skip-mode circuitry that makes it an energy-efficienct device.

The IC is designed for offline, wide-range ac-dc conversion circuit applications, such as in battery chargers, SMPS (Switched-Mode Power Supplies), adapters, telecommunication equipment, computing systems, automation equipment and more. It has a nominal start up voltage range of 1.6V-97VAC and can sustain an input voltage up to 400VAC, making it suitable for most input voltage requirements. It also has built-in PFC (Power Factor Correction) and burst mode circuits, allowing it to achieve a high power factor level (over 0.9) and reduce stand-by power consumption.

LNK6418E\'s operating principle is based on a standard buck converter. Whenever an AC current is input, the IC works in two stages. In the first stage, an internal PFC circuit will convert the input voltage and current into a near-constant DC output. This is then passed through the Buck converter to get the desired regulated output voltage and current. The second stage uses the Skip-Mode circuit, which regulates and maintains the current so that it does not exceed a preset value in order to protect the device and the load from any over-current.

LNK6418E\'s PWM control circuit is based on a hysteretic control principle, which works by controlling the duration of the pulses from the control and driver circuits. This control method allows the IC to maintain constant current and voltage regulation with minimal acoustic noise and better EMI performance than other linear or switching voltage regulators. In addition, the IC also features advanced protection functions such as overload protection (OLP), short circuit protection (SCP), Thermal shutdown protection (TSD) and Under Voltage Lock Out (UVLO). These protection functions ensure a safe and reliable operation of the IC, protecting both the device and the load from potential damage.

Overall, LNK6418E is a powerful, versatile and efficient PMIC device which is designed to provide high power conversion, PFC and Skip-Mode functioning for wide-range ac-dc applications. Its hysteretic PWM control circuit and advanced protection features make it an ideal choice for a wide range of industrial and consumer applications.

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