STMicroelectronics L6562ADT - Power Factor Correction Controller

The L6562ADT from STMicroelectronics is a state-of-the-art Transition-Mode PFC (Power Factor Correction) controller, designed for driving PFC pre-regulators. This advanced controller is part of the L6562 family and is optimized for use in a variety of applications, including but not limited to adapters, LCD and PDP TV sets, and power supplies for printers and audio amplifiers.

With its highly integrated design, the L6562ADT offers a multitude of features that enhance system reliability and performance. It incorporates a fixed off-time control method that regulates an almost constant operating frequency, significantly improving the effectiveness of the PFC stage. The device's ability to operate in Transition Mode ensures that efficiency is maximized while the power factor is maintained close to unity, leading to compliance with international power quality standards such as EN61000-3-2.

The L6562ADT also features a proprietary multiplier design, which ensures minimal THD (Total Harmonic Distortion) and precise input voltage feedforward, further optimizing performance. Its totem-pole output stage, capable of 600mA source and 800mA sink current, is suitable for a wide range of MOSFETs, ensuring flexibility in your design choices.

Protection features are a cornerstone of the L6562ADT's design, with the inclusion of an effective two-level OVP (Over Voltage Protection) that prevents output voltage runaway during transient conditions. Additionally, the device boasts brownout protection, soft-start for a smoother startup, and a disable function that reduces power consumption in standby mode. The L6562ADT also integrates a low (≤70µA) start-up current and a low (≤4mA) quiescent current, optimizing power usage during both startup and normal operation.

Available in a compact SO-8 package, the L6562ADT is a versatile solution for designers looking to implement efficient PFC solutions in their power supply designs. Its robust feature set and high level of integration make it an ideal choice for modern, energy-conscious applications where power efficiency and reliability are paramount.