ISL6721AB-T

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management IC for Switching Power Supplies

Characteristics: - High efficiency - Low power consumption - Wide input voltage range - Overcurrent protection - Thermal shutdown protection

Package: 8-Lead SOIC (Small Outline Integrated Circuit)

Essence: The ISL6721AB-T is a power management IC designed for use in switching power supplies. It provides high efficiency and low power consumption, making it suitable for various applications.

Packaging/Quantity: The ISL6721AB-T is available in a standard 8-Lead SOIC package. It is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 4.5V to 14V
• Output Voltage Range: 0.8V to 5.5V
• Maximum Output Current: 2A
• Switching Frequency: 200kHz to 600kHz
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The ISL6721AB-T has the following pin configuration:

1. VCC - Power supply voltage input
2. GND - Ground reference
3. COMP - Compensation pin for feedback control loop
4. FB - Feedback voltage input for output regulation
5. CS - Current sense input for overcurrent protection
6. RT/CLK - External resistor or clock input for setting switching frequency
7. SS/TR - Soft-start/tracking pin for controlled startup and tracking
8. OUT - Power supply output

Functional Features

• Voltage mode control with adjustable compensation
• Overcurrent protection with adjustable threshold
• Soft-start function for controlled startup
• Thermal shutdown protection to prevent overheating
• Error amplifier for precise voltage regulation

Advantages and Disadvantages

Advantages: - High efficiency leads to energy savings - Wide input voltage range allows for versatile applications - Overcurrent protection ensures system safety - Thermal shutdown protection prevents damage from overheating

Disadvantages: - Limited maximum output current of 2A - Requires external components for proper operation

Working Principles

The ISL6721AB-T operates based on a voltage mode control scheme. It regulates the output voltage by comparing it with a reference voltage and adjusting the duty cycle of the switching signal. This control loop is stabilized using adjustable compensation to ensure stable and accurate output regulation.

The IC also incorporates overcurrent protection, which monitors the current flowing through the power supply and shuts down the system if it exceeds a set threshold. Additionally, the thermal shutdown feature protects the IC from excessive heat by disabling the switching operation when the temperature reaches a critical level.

Detailed Application Field Plans

The ISL6721AB-T is commonly used in various applications, including: 1. Switching power supplies for computer systems 2. Industrial power supplies 3. LED lighting drivers 4. Telecom and networking equipment 5. Consumer electronics

Detailed and Complete Alternative Models

1. ISL6721AA-T
2. ISL6721AC-T
3. ISL6721AD-T
4. ISL6721AE-T
5. ISL6721AF-T

These alternative models are part of the same product family and offer similar functionality with slight variations in specifications or package options.

In conclusion, the ISL6721AB-T is a power management IC designed for switching power supplies. With its high efficiency, low power consumption, and various protection features, it is suitable for a wide range of applications in different industries.