LP55281RLX/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: LED Driver
• Characteristics: Programmable, Multi-channel, Low Power Consumption
• Package: QFN (Quad Flat No-Lead)
• Essence: Efficiently drives and controls multiple LEDs
• Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

• Number of Channels: 3 independent channels
• LED Current: Up to 25mA per channel
• Supply Voltage Range: 2.7V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Interface: I2C compatible
• Dimming Control: PWM (Pulse Width Modulation)
• Programmability: Allows custom programming of LED patterns and behaviors
• Protection Features: Over-temperature shutdown, open/shorted LED detection

Pin Configuration

The LP55281RLX/NOPB IC has a total of 20 pins. The pin configuration is as follows:

1. VDD: Power supply voltage
2. GND: Ground
3. SDA: I2C data line
4. SCL: I2C clock line
5. INT: Interrupt output
6. EN: Enable input
7. REXT: External resistor for current setting
8. OUT1: Channel 1 output
9. OUT2: Channel 2 output
10. OUT3: Channel 3 output
11. NC: No connection
12. NC: No connection
13. NC: No connection
14. NC: No connection
15. NC: No connection
16. NC: No connection
17. NC: No connection
18. NC: No connection
19. NC: No connection
20. NC: No connection

Functional Features

• Independent control of each channel
• Programmable LED patterns and behaviors
• Efficient power management for low power consumption
• Over-temperature shutdown protection
• Open/shorted LED detection for fault handling
• I2C interface for easy integration with microcontrollers

Advantages and Disadvantages

Advantages

• Flexibility in programming LED patterns and behaviors
• Low power consumption for energy efficiency
• Compact QFN package for space-saving designs
• Reliable over-temperature shutdown protection
• Fault detection for improved system reliability

Disadvantages

• Limited to driving LEDs with a maximum current of 25mA per channel
• Requires external resistor for current setting

Working Principles

The LP55281RLX/NOPB is an integrated LED driver IC that efficiently drives and controls multiple LEDs. It operates on a supply voltage range of 2.7V to 5.5V and communicates with a microcontroller through the I2C interface. The IC allows independent control of each channel, enabling custom programming of LED patterns and behaviors.

The LP55281RLX/NOPB uses PWM dimming control to adjust the brightness of the LEDs. It also incorporates protection features such as over-temperature shutdown and open/shorted LED detection to ensure safe operation and fault handling.

Detailed Application Field Plans

The LP55281RLX/NOPB LED driver IC finds applications in various fields, including:

1. Automotive Lighting: Used in interior and exterior lighting systems of automobiles.
2. Portable Devices: Integrated into smartphones, tablets, and wearable devices for LED notifications and indicators.
3. Signage and Displays: Enables dynamic and programmable LED displays for advertising and information boards.
4. Gaming and Entertainment: Provides customizable LED effects in gaming peripherals and entertainment devices.
5. Industrial Automation: Used for status indicators and visual feedback in industrial control systems.

Detailed and Complete Alternative Models

1. LP55280RLX/NOPB: Similar to LP55281RLX/NOPB, but with 2 independent channels instead of 3.
2. LP55282RLX/NOPB: Similar to LP55281RLX/NOPB, but with 4 independent channels instead of 3.
3. IS31FL3733: LED driver IC with 3 independent channels and additional features like audio synchronization.
4. PCA9685: PWM LED controller IC with 16 channels, suitable for driving multiple LEDs simultaneously.

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