LM2574-12YN

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - Input Voltage Range: 4.5V to 40V - Output Voltage: 12V - Output Current: Up to 0.5A - Efficiency: Up to 90% - Package Type: TO-220 - Essence: Step-Down Switching Regulator - Packaging/Quantity: Tube/50 pieces per tube

Specifications

The LM2574-12YN is a step-down switching regulator IC designed for efficient voltage regulation applications. It operates with an input voltage range of 4.5V to 40V and provides a fixed output voltage of 12V. The maximum output current supported by this IC is 0.5A. With its high efficiency of up to 90%, it minimizes power dissipation and ensures reliable performance.

Pin Configuration

The LM2574-12YN has the following pin configuration:

1. VIN: Input Voltage Pin
2. GND: Ground Pin
3. FB: Feedback Pin
4. VOUT: Output Voltage Pin
5. ON/OFF: On/Off Control Pin

Functional Features

• Wide input voltage range allows for versatile applications.
• Fixed output voltage simplifies circuit design.
• High efficiency reduces power dissipation and improves overall system performance.
• Built-in protection features such as thermal shutdown and current limiting enhance reliability.
• Adjustable frequency allows optimization for different applications.

Advantages and Disadvantages

Advantages: - Wide input voltage range enables compatibility with various power sources. - Fixed output voltage eliminates the need for external voltage regulation components. - High efficiency reduces energy waste and prolongs battery life. - Compact TO-220 package facilitates easy integration into circuits. - Built-in protection features enhance system reliability.

Disadvantages: - Limited output current may not be suitable for high-power applications. - Non-adjustable output voltage restricts flexibility in certain scenarios. - Requires external components for proper operation, increasing circuit complexity.

Working Principles

The LM2574-12YN operates as a step-down switching regulator. It utilizes a pulse-width modulation (PWM) control scheme to regulate the output voltage. The input voltage is first stepped down to a lower voltage level using an internal power switch and an inductor. The PWM control adjusts the duty cycle of the power switch to maintain the desired output voltage. This switching action allows for efficient voltage conversion with minimal power loss.

Application Field Plans

The LM2574-12YN finds applications in various fields, including: 1. Power supply modules for industrial equipment 2. Battery-powered devices 3. Automotive electronics 4. Telecommunications equipment 5. LED lighting systems

Alternative Models

Other alternative models that can be considered for similar applications include: - LM2596-12V: Adjustable output voltage version of LM2574-12YN - LM2575-12: Higher output current version of LM2574-12YN - LM317: Linear voltage regulator with adjustable output voltage

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

In conclusion, the LM2574-12YN is a versatile voltage regulator IC designed for efficient voltage regulation applications. With its wide input voltage range, fixed output voltage, and high efficiency, it offers reliable performance in various fields. However, its limited output current and non-adjustable output voltage may restrict its use in certain high-power or flexible applications. Users can also consider alternative models to meet their specific needs.