LP8552TLX-E04/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: LED Driver
• Characteristics: High Efficiency, Programmable Dimming, Wide Input Voltage Range
• Package: 20-Pin WQFN
• Essence: This IC is designed to drive LEDs in backlighting applications for LCD displays.
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 4.5V to 24V
• Output Current Range: Up to 120mA
• Number of Channels: 2
• Dimming Control: PWM (Pulse Width Modulation)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

1. VCC: Power supply voltage input
2. GND: Ground reference
3. EN: Enable pin for turning on/off the device
4. DIM1: Dimming control input for channel 1
5. DIM2: Dimming control input for channel 2
6. ISET1: Current setting pin for channel 1
7. ISET2: Current setting pin for channel 2
8. OUT1: Output pin for channel 1
9. OUT2: Output pin for channel 2
10. FB1: Feedback pin for channel 1
11. FB2: Feedback pin for channel 2
12. AGND: Analog ground reference
13. SDA: I2C data input/output
14. SCL: I2C clock input
15. ADDR: Address selection pin for I2C communication
16. INT: Interrupt output
17. FAULT: Fault indication output
18. NC: No connection
19. NC: No connection
20. VCC: Power supply voltage input

Functional Features

• High efficiency LED driver with integrated power MOSFETs
• Programmable dimming control through PWM signals
• Wide input voltage range allows for versatile applications
• Integrated fault protection and diagnostic features
• I2C interface for configuration and control

Advantages

• Efficient LED driving, resulting in energy savings
• Flexible dimming options for precise brightness control
• Wide input voltage range enables usage in various systems
• Built-in fault protection enhances system reliability
• Easy configuration and control through the I2C interface

Disadvantages

• Limited to driving LEDs in backlighting applications
• Requires additional external components for proper operation
• Relatively high cost compared to simpler LED drivers

Working Principles

The LP8552TLX-E04/NOPB is a two-channel LED driver IC designed specifically for backlighting applications in LCD displays. It utilizes a high-efficiency architecture with integrated power MOSFETs to drive LEDs efficiently. The device accepts a wide input voltage range, allowing it to be used in different systems.

The dimming control of the LED channels is achieved through PWM signals applied to the DIM1 and DIM2 pins. This enables precise control of the LED brightness. The current flowing through the LEDs can be set using the ISET1 and ISET2 pins, providing flexibility in adjusting the overall brightness level.

The LP8552TLX-E04/NOPB also includes fault protection features such as overvoltage, undervoltage, and overtemperature protection. These safeguards enhance the reliability of the LED driver and protect the connected LEDs from potential damage.

The device can be configured and controlled through the I2C interface, which allows for easy integration into existing systems. This interface enables programming of various parameters, including dimming levels, fault thresholds, and other operational settings.

Detailed Application Field Plans

The LP8552TLX-E04/NOPB LED driver IC is primarily used in backlighting applications for LCD displays. It finds extensive use in various electronic devices such as smartphones, tablets, laptops, monitors, and televisions. The programmable dimming control and wide input voltage range make it suitable for different display sizes and power supply configurations.

Detailed and Complete Alternative Models

1. LP8550TLX-E04/NOPB: Similar to LP8552TLX-E04/NOPB but with a single LED channel.
2. LP8556TLX-E04/NOPB: Four-channel LED driver with additional features like RGB color mixing.
3. LP8548TLX-E04/NOPB: Two-channel LED driver with integrated boost converter for higher output voltage.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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