L6561D

Product Overview

Category: Integrated Circuit (IC)
Use: Power Factor Correction (PFC) controller
Characteristics:
- High-performance current-mode PFC controller
- Suitable for offline applications
- Enables high power factor and low total harmonic distortion
Package: SO-8 (Small Outline 8-pin package)
Essence: Efficient power factor correction for improved energy efficiency
Packaging/Quantity: Available in reels of 2500 units

Specifications

Input Voltage Range: 85V to 265V AC
Output Voltage Range: 10V to 20V DC
Operating Frequency: Adjustable from 50kHz to 500kHz
Maximum Duty Cycle: 95%
Total Harmonic Distortion: Less than 5%
Operating Temperature Range: -40°C to +125°C

Pin Configuration

The L6561D IC has the following pin configuration:

Vref: Reference voltage input
COMP: Compensation pin for loop stability
CS: Current sense input
INV: Inverting input of the error amplifier
VCC: Supply voltage input
GND: Ground reference
OUT: Output pin
FB: Feedback pin for voltage regulation

Functional Features

High accuracy in sensing and processing line voltage information
Precise control of the boost converter's duty cycle
Overvoltage protection and brownout detection
Soft-start function for smooth power-up
Built-in leading-edge blanking for improved noise immunity

Advantages and Disadvantages

Advantages: - High power factor and low total harmonic distortion - Wide input voltage range for versatile applications - Excellent line and load regulation - Comprehensive protection features ensure system reliability

Disadvantages: - Requires external components for complete power factor correction implementation - Limited output voltage range

Working Principles

The L6561D is a current-mode PFC controller that operates by sensing the input line voltage and regulating the boost converter's duty cycle to achieve power factor correction. It uses a feedback loop to maintain a constant output voltage while ensuring high efficiency and low distortion.

Detailed Application Field Plans

The L6561D is commonly used in various applications, including:

Switched-mode power supplies (SMPS)
LED lighting systems
Motor drives
Industrial equipment
Consumer electronics

Alternative Models

Other alternative models that can be considered for power factor correction include:

L4981A
UCC28070
FAN7529
MC33262
NCP1653

These models offer similar functionality and can be suitable replacements depending on specific requirements.

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Listen Sie 10 häufige Fragen und Antworten im Zusammenhang mit der Anwendung von L6561D in technischen Lösungen auf

Sure! Here are 10 common questions and answers related to the application of L6561D in technical solutions:

Q1: What is L6561D? A1: L6561D is a power factor corrector (PFC) controller IC used in power supply applications.

Q2: What is the purpose of using L6561D in a power supply? A2: L6561D helps improve the power factor of the power supply, resulting in more efficient energy usage and compliance with power quality standards.

Q3: How does L6561D achieve power factor correction? A3: L6561D uses a boost converter topology along with control algorithms to shape the input current waveform and align it with the input voltage, thus achieving power factor correction.

Q4: What is the maximum operating frequency of L6561D? A4: The maximum operating frequency of L6561D is typically around 100 kHz.

Q5: Can L6561D be used in both single-phase and three-phase power supplies? A5: Yes, L6561D can be used in both single-phase and three-phase power supplies.

Q6: Does L6561D provide overvoltage protection? A6: No, L6561D does not have built-in overvoltage protection. External circuitry may be required for overvoltage protection.

Q7: Is L6561D suitable for high-power applications? A7: Yes, L6561D can be used in high-power applications, but additional considerations such as thermal management and component selection need to be taken into account.

Q8: Can L6561D operate in continuous conduction mode (CCM)? A8: Yes, L6561D can operate in both continuous conduction mode (CCM) and discontinuous conduction mode (DCM), depending on the application requirements.

Q9: What are the typical applications of L6561D? A9: L6561D is commonly used in power supplies for LED lighting, consumer electronics, industrial equipment, and other applications requiring power factor correction.

Q10: Are there any evaluation boards or reference designs available for L6561D? A10: Yes, several manufacturers offer evaluation boards and reference designs for L6561D, which can help simplify the design process and accelerate development.

Please note that these answers are general and may vary depending on specific application requirements and manufacturer's recommendations.