Overview
The L6562AD is a current-mode Power Factor Correction (PFC) controller from STMicroelectronics, operating in Transition Mode (TM). It retains the same pin-out as its predecessors, the L6561 and L6562, while offering improved performance. The device is designed to minimize AC input current distortion, enabling wide-range-mains operation with extremely low Total Harmonic Distortion (THD) across a large load range. It features a highly linear multiplier and a voltage-mode error amplifier with an accurate internal voltage reference of 1% at 25°C. The L6562AD is optimized for low power consumption, with a start-up current of 30µA and a quiescent current of less than 5 mA, making it compliant with various energy-saving standards such as Blue Angel, EnergyStar, and Energy2000.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 10.5 to 22.5 | V |
| Turn-on Threshold | 11.7 to 13.3 | V |
| Turn-off Threshold | 9.5 to 10.5 | V |
| Start-up Current | 30 to 60 | µA |
| Quiescent Current | 2.5 to 5 | mA |
| Gate Driver Peak Current | -600/+800 | mA |
| Operating Temperature Range | -40 to 150 | °C |
| Package | SO-8, DIP-8 |
Key Features
- Proprietary multiplier design for minimum THD of AC input current
- Very accurate adjustable output overvoltage protection
- Ultra-low start-up current (≤30µA)
- Low quiescent current (≤5 mA)
- Digital leading-edge blanking on current sense
- Disable function on E/A input for remote ON/OFF
- 1% (@ TJ = 25°C) internal reference voltage
- -600/+800mA totem pole gate driver with active pull-down during UVLO and voltage clamp
- DIP-8 and SO-8 packages
Applications
- PFC pre-regulators for IEC61000-3-2 compliant Switch-Mode Power Supplies (SMPS) such as those used in flat TVs, monitors, desktop PCs, and gaming consoles
- High-end AC-DC adapters and chargers up to 400W
- Electronic ballasts
- Entry-level servers and web servers
Q & A
- What is the primary function of the L6562AD?
The L6562AD is a current-mode Power Factor Correction (PFC) controller operating in Transition Mode (TM), designed to improve the power factor and reduce harmonic distortion in AC-DC power supplies.
- What are the key benefits of the proprietary multiplier design in the L6562AD?
The proprietary multiplier design minimizes the Total Harmonic Distortion (THD) of the AC input current, allowing for wide-range-mains operation with extremely low THD.
- What is the start-up current of the L6562AD?
The start-up current of the L6562AD is typically 30µA and can be up to 60µA.
- What is the quiescent current of the L6562AD?
The quiescent current of the L6562AD is less than 5 mA.
- What types of packages are available for the L6562AD?
The L6562AD is available in DIP-8 and SO-8 packages.
- What is the operating temperature range of the L6562AD?
The operating temperature range of the L6562AD is from -40°C to 150°C.
- How does the L6562AD handle overvoltages?
The L6562AD features an effective two-step overvoltage protection (OVP) to safely handle overvoltages occurring at start-up or resulting from load disconnection.
- What is the gate driver capability of the L6562AD?
The totem-pole output stage of the L6562AD can source up to 600 mA and sink up to 800 mA, making it suitable for driving high current MOSFETs or IGBTs.
- What are some typical applications of the L6562AD?
The L6562AD is used in PFC pre-regulators for IEC61000-3-2 compliant SMPS, high-end AC-DC adapters, electronic ballasts, and entry-level servers and web servers.
- How does the L6562AD comply with energy-saving standards?
The L6562AD includes a disable function suitable for IC remote ON/OFF, which helps in complying with energy-saving requirements such as Blue Angel, EnergyStar, and Energy2000.
