Texas Instruments
Bild kan vara representation.
Se specifikationer för produktinformation.
LP55231SQX/NOPB
Visa detalj Datablad

LP55231SQX/NOPB

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: LED Driver
  • Characteristics: Programmable, Low Power Consumption
  • Package: 20-WQFN (3x3)
  • Essence: Control and drive multiple LEDs
  • Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

  • Supply Voltage Range: 2.7V to 5.5V
  • Number of Channels: 3 Independent Channels
  • Maximum Output Current: 25mA per Channel
  • Communication Interface: I2C-Compatible
  • Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The LP55231SQX/NOPB has a 20-pin WQFN package with the following pin configuration:

  1. VLED1: LED Channel 1 Anode
  2. GND: Ground
  3. SDA: I2C Data Line
  4. SCL: I2C Clock Line
  5. VDD: Power Supply Voltage
  6. VLED2: LED Channel 2 Anode
  7. VLED3: LED Channel 3 Anode
  8. GND: Ground
  9. GND: Ground
  10. GND: Ground
  11. GND: Ground
  12. GND: Ground
  13. GND: Ground
  14. GND: Ground
  15. GND: Ground
  16. GND: Ground
  17. GND: Ground
  18. GND: Ground
  19. GND: Ground
  20. VLED4: LED Channel 4 Anode

Functional Features

  • Programmable LED current sinks
  • Independent control of each LED channel
  • Built-in PWM generator for dimming control
  • Flexible LED sequencing and blinking patterns
  • Internal voltage reference for accurate current control
  • Low power consumption in idle mode

Advantages and Disadvantages

Advantages: - Programmable LED current allows flexibility in driving different types of LEDs - Independent control of each channel enables dynamic lighting effects - Low power consumption extends battery life in portable applications - Small package size saves board space

Disadvantages: - Limited number of channels (3) may not be sufficient for complex LED configurations - Requires I2C communication interface, which may add complexity to the design

Working Principles

The LP55231SQX/NOPB is an integrated LED driver IC that controls and drives multiple LEDs. It operates by receiving commands through the I2C interface from a microcontroller or other master device. The IC features programmable LED current sinks, allowing precise control of the brightness of each LED channel.

The LP55231SQX/NOPB includes a built-in PWM generator, which enables dimming control by adjusting the duty cycle of the LED current. This feature allows for smooth fading and dynamic lighting effects.

The IC also provides flexible LED sequencing and blinking patterns, making it suitable for various lighting applications. Its low power consumption in idle mode ensures energy efficiency, particularly in battery-powered devices.

Detailed Application Field Plans

The LP55231SQX/NOPB finds applications in various fields, including:

  1. Portable Electronics: LED indicators, backlighting for displays, keypad illumination.
  2. Automotive: Interior and exterior lighting, dashboard indicators.
  3. IoT Devices: Smart home lighting, wearable devices, connected sensors.
  4. Industrial Automation: Status indicators, machine vision lighting.
  5. Medical Equipment: Surgical lighting, diagnostic instruments.

Detailed and Complete Alternative Models

  1. LP55280SQ/NOPB: 9-channel LED driver with higher current capability.
  2. LP5562TMX/NOPB: 4-channel LED driver with integrated color mixing capability.
  3. LP8501SQE/NOPB: 8-channel LED driver with integrated ambient light sensor.

These alternative models offer different channel counts, current capabilities, and additional features to suit specific application requirements.

Word count: 511 words

Lista 10 Vanliga frågor och svar relaterade till tillämpningen av LP55231SQX/NOPB i tekniska lösningar

  1. Question: What is the maximum current output of LP55231SQX/NOPB?
    Answer: The maximum current output of LP55231SQX/NOPB is 25mA per channel.

  2. Question: Can LP55231SQX/NOPB be used in automotive applications?
    Answer: Yes, LP55231SQX/NOPB is suitable for automotive applications due to its wide operating temperature range and AEC-Q100 qualification.

  3. Question: What is the typical input voltage range for LP55231SQX/NOPB?
    Answer: The typical input voltage range for LP55231SQX/NOPB is 2.7V to 5.5V.

  4. Question: Does LP55231SQX/NOPB support I2C communication?
    Answer: Yes, LP55231SQX/NOPB supports I2C communication for easy integration into digital systems.

  5. Question: Can LP55231SQX/NOPB be used for RGB LED control?
    Answer: Yes, LP55231SQX/NOPB can be used for controlling RGB LEDs with its three independent channels.

  6. Question: What is the thermal shutdown temperature of LP55231SQX/NOPB?
    Answer: The thermal shutdown temperature of LP55231SQX/NOPB is typically 150°C.

  7. Question: Is LP55231SQX/NOPB suitable for handheld device applications?
    Answer: Yes, LP55231SQX/NOPB is suitable for handheld devices due to its small package size and low power consumption.

  8. Question: Can LP55231SQX/NOPB be cascaded for controlling more than three LEDs?
    Answer: Yes, LP55231SQX/NOPB can be cascaded to control additional LEDs by connecting multiple devices together.

  9. Question: What is the dimming control range of LP55231SQX/NOPB?
    Answer: The dimming control range of LP55231SQX/NOPB is typically from 0% to 100%.

  10. Question: Does LP55231SQX/NOPB have built-in LED current matching?
    Answer: Yes, LP55231SQX/NOPB features built-in LED current matching to ensure uniform brightness across multiple LEDs.