L6562ADTR is a current-mode PFC (Power Factor Correction) controller launched by STMicroelectronics.

I. Core Functions

1. Power Factor CorrectionOperating in Transition Mode (TM), it reduces AC input current distortion via a high-linearity multiplier, enabling operation across a wide mains voltage range with ultra-low Total Harmonic Distortion (THD) and improving the power factor of power supplies.

2. Output Voltage ControlIt controls the output voltage using a voltage-mode error amplifier and a precise internal reference voltage (1% accuracy at 25°C), ensuring output voltage stability.

3. Protection FunctionsIt features an effective two-step Over-Voltage Protection (OVP) to safely handle overvoltage conditions caused by startup or load disconnection. It also integrates Over-Current Protection (OCP), over-temperature protection, and Under-Voltage Lockout (UVLO) functions.

4. Driving CapabilityThe totem-pole output stage delivers a source current of 600mA and a sink current of 800mA, suitable for driving high-current MOSFETs or IGBTs.

5. Disable FunctionThe Error Amplifier (E/A) input pin is equipped with a disable function. Applying a low voltage to this pin can shut down the IC to reduce power consumption, facilitating remote ON/OFF control of the device.

II. Main Application Fields

1. Consumer ElectronicsIt is suitable for switching power supplies compliant with the IEC61000-3-2 standard, such as power supply sections of flat-panel TVs, monitors, desktop computers, and game consoles.

2. Power AdaptersIt can be used in high-end AC-DC adapters/chargers with a maximum power rating of up to 400W.

3. Electronic BallastsIt plays a role in electronic ballasts to achieve high-efficiency power factor correction.

4. ServersIt is applicable to power supply systems of entry-level servers and network servers.

III. Technical Advantages

1. Low Power ConsumptionWith a maximum start-up current of 60μA, an operating current of less than 5mA, and a quiescent current of 2.5mA, it boasts low power consumption and can easily meet energy-saving requirements.

2. High PrecisionThe high-accuracy internal reference voltage (1% at 25°C) enables precise voltage control and current detection.

3. Simplified DesignHoused in an SO-8 package, it features a compact size and fixed-frequency operation, facilitating filter design and EMI control. It eliminates the need for an auxiliary winding, reducing the number of peripheral components and simplifying circuit design.

4. Strong StabilityBuilt-in slope compensation effectively prevents subharmonic oscillation issues. It supports cycle-by-cycle current limiting, enhancing system reliability.

IV. Summary

As a high-performance PFC controller, L6562ADTR is widely used in consumer electronics, power adapters and other fields, thanks to its core functions including power factor correction, precise voltage control and multiple protection mechanisms. With technical advantages such as low power consumption, high precision, simplified design and strong stability, it provides an efficient and reliable solution for power supply systems, helping to improve power supply efficiency and stability to meet the requirements of different application scenarios.