NXP USA Inc.
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PCA8550DB,118
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PCA8550DB,118

Product Overview

Category

PCA8550DB,118 belongs to the category of integrated circuits (ICs).

Use

This product is commonly used for driving LEDs in applications such as backlighting, displays, and indicators.

Characteristics

  • The PCA8550DB,118 is a low-voltage 16-bit I2C-bus LED driver.
  • It can drive up to 16 LEDs directly.
  • The device operates with a supply voltage range from 2.3V to 5.5V.
  • It offers a wide dimming range and adjustable current levels for each LED.
  • The PCA8550DB,118 supports both individual and group control of LEDs.

Package

The PCA8550DB,118 is available in a small outline package (SO) with 24 pins.

Essence

The essence of PCA8550DB,118 lies in its ability to efficiently drive multiple LEDs using the I2C-bus interface.

Packaging/Quantity

The PCA8550DB,118 is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

  • Supply Voltage Range: 2.3V to 5.5V
  • Maximum Output Current per Channel: 25mA
  • Number of Channels: 16
  • Dimming Control: Individual and Group
  • Communication Interface: I2C-bus
  • Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The PCA8550DB,118 has a total of 24 pins. The pin configuration is as follows:

  1. SDA - Serial Data Input/Output
  2. SCL - Serial Clock Input
  3. VDD - Power Supply
  4. GND - Ground
  5. OUT0 - LED Output 0
  6. OUT1 - LED Output 1
  7. OUT2 - LED Output 2
  8. OUT3 - LED Output 3
  9. OUT4 - LED Output 4
  10. OUT5 - LED Output 5
  11. OUT6 - LED Output 6
  12. OUT7 - LED Output 7
  13. OUT8 - LED Output 8
  14. OUT9 - LED Output 9
  15. OUT10 - LED Output 10
  16. OUT11 - LED Output 11
  17. OUT12 - LED Output 12
  18. OUT13 - LED Output 13
  19. OUT14 - LED Output 14
  20. OUT15 - LED Output 15
  21. VBAT - Battery Voltage Input
  22. VDD - Power Supply
  23. GND - Ground
  24. NC - No Connection

Functional Features

  • Individual and group control of LEDs.
  • Adjustable current levels for each LED.
  • Wide dimming range for precise brightness control.
  • Low-voltage operation for energy efficiency.
  • I2C-bus interface for easy integration into existing systems.
  • Compact package for space-constrained applications.

Advantages and Disadvantages

Advantages

  • Efficiently drives multiple LEDs.
  • Flexible control options.
  • Wide dimming range.
  • Energy-efficient operation.
  • Easy integration with I2C-bus interface.

Disadvantages

  • Limited to driving LEDs only.
  • Requires an external power supply.

Working Principles

The PCA8550DB,118 operates by receiving commands through the I2C-bus interface. It then translates these commands into appropriate current levels for each LED output. The device allows individual or group control of LEDs, enabling precise brightness adjustment. By adjusting the current levels, the PCA8550DB,118 achieves the desired illumination for various LED applications.

Detailed Application Field Plans

The PCA8550DB,118 finds applications in various fields, including: - Backlighting for LCD displays - Indicator lights in automotive systems - Illumination control in consumer electronics - LED matrix displays - Signage and advertising boards

Detailed and Complete Alternative Models

  1. PCA9550DB,118 - 8-bit I2C-bus LED driver with similar features but fewer output channels.
  2. PCA9685PW,118 - 16-channel I2C-bus controlled LED driver with higher current capability.
  3. TLC5940NT - 16-channel constant-current LED driver with grayscale control.

These alternative models offer different specifications and features, providing options based on specific application requirements.

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Énumérez 10 questions et réponses courantes liées à l'application de PCA8550DB,118 dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of PCA8550DB,118:

  1. Q: What is PCA8550DB,118? A: PCA8550DB,118 is a digital I/O expander with an I2C-bus interface, which allows for expanding the number of available I/O pins in a microcontroller-based system.

  2. Q: How many I/O pins does PCA8550DB,118 provide? A: PCA8550DB,118 provides 8 I/O pins that can be configured as inputs or outputs.

  3. Q: What is the operating voltage range of PCA8550DB,118? A: PCA8550DB,118 operates within a voltage range of 2.5V to 6V.

  4. Q: Can PCA8550DB,118 be used with both 3.3V and 5V microcontrollers? A: Yes, PCA8550DB,118 is compatible with both 3.3V and 5V microcontrollers.

  5. Q: How do I communicate with PCA8550DB,118 using the I2C-bus interface? A: You can communicate with PCA8550DB,118 by connecting it to the microcontroller's I2C bus and sending appropriate commands and data over the bus.

  6. Q: Can PCA8550DB,118 be used to drive high-current loads? A: No, PCA8550DB,118 is not designed to drive high-current loads directly. It is recommended to use external drivers or buffers for such applications.

  7. Q: Can I use multiple PCA8550DB,118 devices in the same system? A: Yes, you can use multiple PCA8550DB,118 devices in the same system by assigning unique I2C addresses to each device.

  8. Q: What is the maximum frequency of the I2C-bus interface supported by PCA8550DB,118? A: PCA8550DB,118 supports a maximum I2C-bus frequency of 400kHz.

  9. Q: Can PCA8550DB,118 be used in automotive applications? A: Yes, PCA8550DB,118 is suitable for automotive applications as it can operate within the specified temperature range and has ESD protection.

  10. Q: Are there any application examples or reference designs available for PCA8550DB,118? A: Yes, you can refer to the datasheet and application notes provided by the manufacturer for detailed application examples and reference designs using PCA8550DB,118.

Please note that these answers are general and may vary depending on the specific requirements and use cases. It's always recommended to refer to the datasheet and documentation provided by the manufacturer for accurate information.