LM2514GR/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: LM2514GR/NOPB is a high-performance step-up switching regulator designed for driving white LEDs. It provides a constant current output to ensure uniform brightness and extend LED lifespan.

Characteristics: - High efficiency - Wide input voltage range - Adjustable output current - Over-temperature protection - Under-voltage lockout

Package: LM2514GR/NOPB is available in a small outline package (SOP) with 8 pins.

Essence: This IC is specifically designed to drive white LEDs efficiently and reliably, making it suitable for various lighting applications.

Packaging/Quantity: The LM2514GR/NOPB is typically sold in reels containing 2500 units per reel.

Specifications

• Input Voltage Range: 3V to 40V
• Output Current Range: Up to 1A
• Switching Frequency: 500kHz
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM2514GR/NOPB has the following pin configuration:

```

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| | --| VIN | --| GND | --| FB | --| EN | --| SW | --| LX | --| VOUT | |___________| ```

Functional Features

1. High Efficiency: The LM2514GR/NOPB utilizes a high-efficiency step-up switching regulator topology, ensuring minimal power loss during operation.

2. Wide Input Voltage Range: With an input voltage range of 3V to 40V, this IC can be used in a wide range of applications.

3. Adjustable Output Current: The output current can be adjusted using the feedback (FB) pin, allowing for precise control of LED brightness.

4. Over-temperature Protection: The IC incorporates over-temperature protection, which safeguards the device and LEDs from damage during high-temperature conditions.

5. Under-voltage Lockout: The LM2514GR/NOPB features under-voltage lockout, preventing operation when the input voltage falls below a specified threshold.

Advantages and Disadvantages

Advantages: - High efficiency results in reduced power consumption. - Wide input voltage range allows for versatile application. - Adjustable output current enables precise control of LED brightness. - Over-temperature protection ensures device and LED longevity. - Under-voltage lockout protects against low input voltage conditions.

Disadvantages: - Limited to driving white LEDs only. - Requires external components for proper operation.

Working Principles

The LM2514GR/NOPB operates on the principle of a step-up switching regulator. It converts the input voltage to a higher regulated output voltage suitable for driving white LEDs. The switching frequency of 500kHz ensures efficient power conversion. The adjustable output current is achieved by controlling the duty cycle of the internal switch.

Detailed Application Field Plans

The LM2514GR/NOPB can be applied in various lighting applications, including: 1. Automotive interior lighting 2. Backlighting for LCD displays 3. Architectural and decorative lighting 4. Portable devices with LED indicators 5. Emergency lighting systems

Alternative Models

1. LM3414 - Step-up switching regulator for driving white LEDs with similar specifications.
2. LT3474 - High-efficiency step-up switching regulator with adjustable output current.
3. TPS61165 - Integrated LED driver with boost converter functionality.

These alternative models offer similar features and can be considered as substitutes for the LM2514GR/NOPB.

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