LM3552SDX/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: The LM3552SDX/NOPB is a versatile integrated circuit designed for controlling and driving light-emitting diodes (LEDs). It provides efficient and precise control of LED brightness, making it suitable for various applications such as backlighting in LCD displays, automotive lighting, and general illumination.

Characteristics: - High efficiency LED driver - Wide input voltage range - Adjustable current sink - PWM dimming control - Over-temperature protection - Low dropout voltage

Package: The LM3552SDX/NOPB is available in a small outline package (SOP) with 8 pins. This compact package ensures easy integration into space-constrained designs.

Essence: The essence of the LM3552SDX/NOPB lies in its ability to provide accurate and efficient control of LED brightness, enabling optimal performance and energy savings in various lighting applications.

Packaging/Quantity: The LM3552SDX/NOPB is typically sold in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Maximum Output Current: 30mA
• Dimming Control: PWM (Pulse Width Modulation)
• Operating Temperature Range: -40°C to +85°C
• Package Type: SOP-8

Pin Configuration

The LM3552SDX/NOPB features the following pin configuration:

| Pin Number | Pin Name | Function | |------------|----------|----------| | 1 | VIN | Power Supply Input | | 2 | GND | Ground | | 3 | EN | Enable Control Input | | 4 | DIM | Dimming Control Input | | 5 | FB | Feedback Voltage Input | | 6 | ISET | Current Set Input | | 7 | LX | LED Cathode Connection | | 8 | VOUT | Output Voltage |

Functional Features

• Efficient LED driver with adjustable current sink
• Wide input voltage range for versatile applications
• PWM dimming control for precise brightness adjustment
• Over-temperature protection to prevent damage
• Low dropout voltage for improved energy efficiency

Advantages and Disadvantages

Advantages: - Precise and efficient LED brightness control - Wide input voltage range allows for flexible usage - PWM dimming control enables accurate brightness adjustment - Over-temperature protection ensures device safety - Low dropout voltage enhances energy efficiency

Disadvantages: - Limited maximum output current (30mA) - Requires external components for complete LED driving solution

Working Principles

The LM3552SDX/NOPB operates by regulating the current flowing through the connected LEDs. It uses a feedback mechanism to adjust the current sink, ensuring consistent brightness levels. The dimming control input allows for pulse width modulation (PWM) signals to adjust the LED brightness accurately.

Detailed Application Field Plans

The LM3552SDX/NOPB finds application in various fields, including:

1. LCD Backlighting: The IC can be used to control the brightness of LED backlights in LCD displays, ensuring optimal viewing experiences in different lighting conditions.

2. Automotive Lighting: The LM3552SDX/NOPB is suitable for driving LEDs in automotive lighting systems, such as headlights, taillights, and interior lighting. Its wide input voltage range and efficient operation make it ideal for automotive applications.

3. General Illumination: The IC can be utilized in general illumination applications, such as residential and commercial lighting. Its ability to provide precise brightness control and energy efficiency makes it a viable option for these applications.

Detailed and Complete Alternative Models

1. LM3553SDX/NOPB: Similar to the LM3552SDX/NOPB, this IC offers adjustable current sink and PWM dimming control. It has a higher maximum output current of 50mA, making it suitable for applications requiring higher LED currents.

2. LM3409HVMM/NOPB: This IC is designed specifically for high-voltage LED driver applications. It features a wide input voltage range and supports both analog and PWM dimming control.

3. LT3474EFE#PBF: This IC provides a complete LED driver solution with integrated boost converter and current sink. It offers high efficiency and precise dimming control, making it suitable for various lighting applications.

In conclusion, the LM3552SDX/NOPB is a versatile LED driver IC that offers efficient and precise control of LED brightness. Its wide input voltage range, adjustable current sink, and PWM dimming control make it suitable for a range of applications in LCD backlighting, automotive lighting, and general illumination. While it has some limitations in terms