LNK4022S-TL Integrated Circuits (ICs)

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The LNK4022S-TL has a versatile range of applications and is a standard AC/DC converter. It is suitable for a wide range of offline switching or stand-alone applications and can easily be used in both hardwired and softwired applications. This makes the device suitable for various types of power supply applications, such as LED lighting, adaptive lighting, dimmers, and industrial motor control.

The LNK4022S-TL device can be used in either an AC input or a single ended DC input application, with the same AC output feature. The device features both single-ended and dual-ended output options, allowing for maximum flexibility in a wide range of applications. Additionally, the device features an integrated MOSFET gate driver stage and a high frequency PFC control circuit with a high efficiency DC-DC boost topology.

The LNK4022S-TL device has an active quasi-resonant (QR) operation, suitable for offline converters operating in the typical frequency range of 40 kHz to 100 kHz. This operation enables reduced switching losses, minimized EMC noise and optimized power dissipation. In addition, the LNK4022S-TL also has built in soft start and adjustable over-current protection, ensuring stable and safe operation within the specified operating conditions.

The device can also be used in an AC-to-AC application and is designed to control an AC load from a single-phase AC power source. The LNK4022S-TL device has the ability to perform both AC-to-AC voltage conversion, as well as AC-to-DC voltage conversion. This provides a cost-effective solution for applications requiring both AC and DC output voltage control and is suitable for applications such as LED display backlights, dimmers and motors.

The working principle of the LNK4022S-TL device is based on a standard closed loop control architecture. The device features an AC input stage with an overvoltage protection circuit and an active filter. The active filter suppresses unwanted input harmonics and delivers a clean source voltage to the rest of the stages. The device then features a quad-channel toggle rectifier-isolated, isolated high-frequency link between the input and output stages. This link enables the distribution of the output power across all four channels, allowing for efficient performance, high power density and low electromagnetic interference (EMI).

The output stage of the LNK4022S-TL device is controlled by an internal PWM control circuit, which is driven by a closed loop circuitry, using feedback from the voltage error amplifier. The PWM control circuit regulates the output voltage based on the set-point, which is programmed by a voltage reference circuit. This ensures accurate and stable output voltage, regardless of load and line variations.

The LNK4022S-TL is a highly versatile device suitable for a wide range of applications. Its ability to perform both AC-to-AC and AC-to-DC voltage conversion makes it suitable for solutions such as LED lighting, adaptive lighting, dimmers, industrial motor control and AC-to-DC applications. In addition, its high frequency QR operation and integrated MOSFET gate driver stage provide for reduced switching losses, high power efficiency, minimized EMC noise and optimized power dissipation.

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