E-L6561: English Editing Encyclopedia Entry

Product Overview

Category

E-L6561 belongs to the category of integrated circuits (ICs) used in power management applications.

Use

This IC is primarily used for controlling and regulating power factor correction (PFC) circuits in various electronic devices.

Characteristics

• E-L6561 is a highly efficient PFC controller that ensures optimal power utilization.
• It operates at high frequency, enabling compact and lightweight designs.
• The IC incorporates advanced protection features to safeguard against overvoltage, overcurrent, and overtemperature conditions.

Package and Quantity

E-L6561 is available in a standard 8-pin dual in-line package (DIP). It is typically sold in reels containing 250 units.

Specifications

• Input Voltage Range: 85V to 265V AC
• Output Voltage Range: 400V to 800V DC
• Operating Frequency: 100kHz to 200kHz
• Maximum Output Power: 300W

Pin Configuration

The E-L6561 IC has the following pin configuration:

| Pin Number | Pin Name | Description | |------------|----------|-------------| | 1 | VCC | Power supply voltage input | | 2 | GND | Ground reference | | 3 | CS | Current sense input | | 4 | INV | Inverting input | | 5 | COMP | Compensation input | | 6 | RT/CT | Timing resistor/capacitor connection | | 7 | OUT | Output voltage | | 8 | FB | Feedback input |

Functional Features

• E-L6561 provides precise control over the power factor correction process, resulting in improved energy efficiency.
• It offers adjustable output voltage and current limits, allowing customization based on specific application requirements.
• The IC incorporates a soft-start function, preventing excessive inrush current during startup.
• It features an integrated error amplifier and voltage reference for accurate regulation.

Advantages and Disadvantages

Advantages

• High power factor correction efficiency leads to reduced energy consumption.
• Compact size and lightweight design enable space-saving integration into various electronic devices.
• Advanced protection features ensure reliable operation and prevent damage to the circuitry.

Disadvantages

• Limited output power capacity of 300W may not be suitable for high-power applications.
• Requires external components for complete power factor correction implementation.

Working Principles

E-L6561 operates based on the principle of continuous conduction mode (CCM) boost converter. It utilizes a feedback control loop to regulate the input current waveform, ensuring it follows the shape of the input voltage waveform. This results in improved power factor correction and reduced harmonic distortion.

The IC monitors the input current through the CS pin and compares it with the reference voltage generated by the FB pin. By adjusting the duty cycle of the internal oscillator, E-L6561 controls the switching of the power MOSFET connected to the boost converter. This enables precise control over the output voltage and power factor correction process.

Application Field Plans

E-L6561 finds extensive application in various power management scenarios, including:

1. Switch-mode power supplies (SMPS)
2. LED lighting systems
3. Motor drives
4. Industrial automation equipment
5. Consumer electronics

Alternative Models

For power factor correction applications, alternative IC models that can be considered include:

1. E-L6900: Offers higher output power capacity of up to 600W.
2. E-L4981: Suitable for low-power applications with an output power range of up to 100W.
3. E-L6668: Provides advanced protection features and supports higher operating frequencies.

These alternative models offer different specifications and features, allowing designers to choose the most suitable option based on their specific requirements.

In conclusion, E-L6561 is a highly efficient PFC controller used in power management applications. Its compact size, advanced protection features, and precise control capabilities make it an ideal choice for various electronic devices requiring power factor correction.

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