LP5521TM/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: LED Driver
• Characteristics: Programmable, Low Power Consumption
• Package: 20-TSSOP
• Essence: Control and drive multiple LEDs
• Packaging/Quantity: Tape & Reel (2500 units per reel)

Specifications

• Operating Voltage: 2.7V to 5.5V
• Number of Channels: 3 Independent Channels
• LED Current Range: 0mA to 25mA
• Programmable PWM Frequency: 100Hz to 10kHz
• I2C Interface: Supports Fast Mode (400kHz) and Standard Mode (100kHz)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LP5521TM/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 Serial Data Input/Output
4. SCL: I2C Serial Clock Input
5. INT: Interrupt Output
6. EN: Enable Input
7. REXT: External Resistor for LED Current Setting
8. LED1: Channel 1 LED Output
9. LED2: Channel 2 LED Output
10. LED3: Channel 3 LED 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

• Programmable LED current and PWM frequency for each channel
• Independent control of three LED channels
• Integrated power-on reset and thermal shutdown protection
• Low power consumption in standby mode
• I2C interface for easy communication with microcontrollers

Advantages and Disadvantages

Advantages

• Flexibility in controlling LED current and PWM frequency
• Small package size allows for space-efficient designs
• Low power consumption extends battery life
• Integrated protection features enhance reliability

Disadvantages

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

Working Principles

The LP5521TM/NOPB is a programmable LED driver IC that controls and drives multiple LEDs. It operates on an input voltage ranging from 2.7V to 5.5V. The IC consists of three independent channels, each capable of driving an LED with a current range of 0mA to 25mA.

The LED current and PWM frequency for each channel can be programmed using the I2C interface. This allows for precise control over the brightness and modulation of the LEDs. The IC also includes integrated power-on reset and thermal shutdown protection mechanisms to ensure safe operation.

In standby mode, the LP5521TM/NOPB consumes very low power, making it suitable for battery-powered applications. Its small package size (20-TSSOP) enables compact and space-efficient designs.

Detailed Application Field Plans

The LP5521TM/NOPB LED driver IC finds applications in various fields, including:

1. Portable Electronics: Used in smartphones, tablets, and wearable devices to control and drive indicator LEDs.
2. Automotive Lighting: Enables efficient control of interior and exterior LED lighting systems in vehicles.
3. Gaming Consoles: Provides programmable LED control for gaming console accessories and peripherals.
4. Industrial Automation: Used in control panels and displays to drive status indicator LEDs.
5. Medical Devices: Enables precise control of LED-based indicators and displays in medical equipment.

Detailed and Complete Alternative Models

1. LP5523TM/NOPB: Similar to LP5521TM/NOPB, but with 4 independent channels instead of 3.
2. LP55231TM/NOPB: Offers 9 independent channels for driving multiple LEDs simultaneously.
3. LP55281TM/NOPB: Provides advanced features like color mixing and fading effects for RGB LEDs.

These alternative models offer expanded capabilities and options for different LED driving requirements.

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