Overview
The L6562A, produced by STMicroelectronics, is a current-mode Power Factor Correction (PFC) controller operating in Transition Mode (TM). It maintains the same pin-out as its predecessors, the L6561 and L6562, but offers improved performance. The device is designed to minimize Total Harmonic Distortion (THD) of the AC input current, enabling wide-range-mains operation with high efficiency. It features a highly linear multiplier and an accurate voltage-mode error amplifier, making it suitable for various high-power applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 10.5 | - | 22.5 | V |
| Turn-on Threshold (VCC) | 11.7 | 12.5 | 13.3 | V |
| Turn-off Threshold (VCC) | 9.5 | 10 | 10.5 | V |
| Start-up Current | - | - | 60 | µA |
| Quiescent Current | - | - | 3.75 | mA |
| Gate Driver Peak Current | - | - | 600/800 | mA (source/sink) |
| Internal Reference Voltage | - | 2.5 | - | V |
| Junction Temperature Range | -40 | - | 150 | °C |
| Storage Temperature Range | -55 | - | 150 | °C |
Key Features
- Proprietary multiplier design for minimum THD of AC input current, allowing wide-range-mains operation with extremely low THD.
- Very accurate adjustable output overvoltage protection with a two-step OVP mechanism.
- Ultra-low start-up current (30µA) and low quiescent current (2.5mA).
- Digital leading-edge blanking on current sense.
- Disable function on E/A input for remote ON/OFF control, aiding in compliance with energy-saving regulations.
- 1% accurate internal reference voltage at TJ = 25°C.
- Totem-pole gate driver capable of -600/+800mA with active pull-down during UVLO and voltage clamp.
- Available in DIP-8 and SO-8 packages.
- Special THD optimizer circuit to reduce conduction dead-angle near the zero-crossings of the line voltage.
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/chargers up to 400W.
- Electronic ballasts.
- Entry-level server and web server power supplies.
Q & A
- What is the primary function of the L6562A?
The L6562A is a current-mode Power Factor Correction (PFC) controller operating in Transition Mode (TM).
- What are the key benefits of the proprietary multiplier design in the L6562A?
The proprietary multiplier design minimizes 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 L6562A?
The start-up current of the L6562A is 30µA.
- What is the quiescent current of the L6562A?
The quiescent current of the L6562A is 2.5mA.
- What is the gate driver capability of the L6562A?
The totem-pole gate driver is capable of -600/+800mA.
- What are the available packages for the L6562A?
The L6562A is available in DIP-8 and SO-8 packages.
- What is the purpose of the THD optimizer circuit in the L6562A?
The THD optimizer circuit reduces the conduction dead-angle near the zero-crossings of the line voltage, significantly reducing THD.
- What are some typical applications of the L6562A?
Typical applications include PFC pre-regulators for IEC61000-3-2 compliant SMPS, high-end AC-DC adapters/chargers, electronic ballasts, and entry-level server power supplies.
- How does the L6562A comply with energy-saving regulations?
The L6562A includes a disable function suitable for IC remote ON/OFF, which helps in complying with energy-saving regulations such as Blue Angel, EnergyStar, and Energy2000.
- What is the internal reference voltage accuracy of the L6562A?
The internal reference voltage of the L6562A is accurate to 1% at TJ = 25°C.
