LM3561TMX/NOPB

Product Overview

Category: Integrated Circuits (ICs)

Use: The LM3561TMX/NOPB is a high-efficiency white LED driver designed for backlight applications in LCD displays. It provides a constant current output to drive up to 10 LEDs in series, making it suitable for use in smartphones, tablets, and other portable electronic devices.

Characteristics: - High efficiency: The LM3561TMX/NOPB features a high-efficiency boost converter that allows for maximum power transfer to the LEDs, resulting in reduced power consumption. - Wide input voltage range: It can operate from a wide input voltage range of 2.7V to 5.5V, making it compatible with various power sources. - Adjustable current: The device allows for adjustable LED current through an external resistor, providing flexibility in controlling the brightness of the LEDs. - Over-voltage protection: It incorporates over-voltage protection to safeguard the LEDs from excessive voltage levels.

Package: The LM3561TMX/NOPB is available in a small 16-pin thermally enhanced WQFN package, which helps in dissipating heat efficiently.

Essence: The essence of the LM3561TMX/NOPB lies in its ability to efficiently drive and control the brightness of white LEDs used in LCD backlighting applications.

Packaging/Quantity: The LM3561TMX/NOPB is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Maximum Output Current: 30mA
• Number of LEDs: Up to 10 in series
• Operating Temperature Range: -40°C to +85°C
• Efficiency: Up to 90%
• Dimming Control: Analog or PWM

Pin Configuration

The LM3561TMX/NOPB has the following pin configuration:

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| | | LM3561TMX/NOPB | |_______________________________________| | | | 1 2 3 4 5 6 7 8 9 10| |_______________________________________|

Pin 1: VIN (Input Voltage) Pin 2: EN (Enable) Pin 3: GND (Ground) Pin 4: FB (Feedback) Pin 5: DIM (Dimming Control) Pin 6-15: LEDx (LED Cathode) Pin 16: SW (Switch Node) ```

Functional Features

• High-efficiency boost converter for maximum power transfer to LEDs.
• Adjustable LED current through an external resistor for brightness control.
• Over-voltage protection to prevent damage to LEDs.
• Enable pin for easy on/off control.
• Dimming control input for analog or PWM dimming.

Advantages and Disadvantages

Advantages: - High efficiency results in reduced power consumption. - Wide input voltage range allows compatibility with various power sources. - Adjustable LED current provides flexibility in controlling brightness. - Over-voltage protection safeguards LEDs from excessive voltage levels.

Disadvantages: - Limited to driving up to 10 LEDs in series, may not be suitable for applications requiring more LEDs.

Working Principles

The LM3561TMX/NOPB operates as a boost converter, converting the input voltage to a higher voltage required to drive the series-connected LEDs. The device regulates the output current to maintain a constant brightness level. The LED current can be adjusted by selecting an appropriate external resistor value. The enable pin allows for easy on/off control, while the dimming control input enables analog or PWM dimming of the LEDs.

Detailed Application Field Plans

The LM3561TMX/NOPB is primarily used in LCD backlighting applications, such as smartphones, tablets, and portable electronic devices. Its high efficiency and adjustable LED current make it suitable for achieving optimal brightness levels while minimizing power consumption. The device's small package size and wide input voltage range further enhance its applicability in various portable devices.

Detailed and Complete Alternative Models

• TPS61165: High-efficiency white LED driver with integrated boost converter.
• LT3479: Synchronous boost LED driver with adjustable output current.
• AP3031: High-efficiency boost converter with integrated LED driver.

These alternative models offer similar functionality to the LM3561TMX/NOPB and can be considered as alternatives based on specific application requirements.

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