PCA9674BS,118

Product Overview

Category

PCA9674BS,118 belongs to the category of integrated circuits (ICs).

Use

This product is commonly used for controlling and driving LEDs in various applications.

Characteristics

• The PCA9674BS,118 is a 16-bit I2C-bus LED driver.
• It provides 16 open-drain, constant-current-sinking outputs.
• Each output can sink up to 25 mA.
• The device operates from a supply voltage range of 2.3 V to 5.5 V.
• It is compatible with both 2.5 V and 3.3 V logic levels.
• The PCA9674BS,118 offers individual LED brightness control through PWM (Pulse Width Modulation).
• It has built-in power-on reset and software reset functions.

Package

The PCA9674BS,118 is available in a small outline package (SO) with 24 pins.

Essence

The essence of PCA9674BS,118 lies in its ability to efficiently control and drive multiple LEDs using the I2C-bus interface.

Packaging/Quantity

The PCA9674BS,118 is typically sold in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Supply Voltage Range: 2.3 V to 5.5 V
• Logic Compatibility: 2.5 V and 3.3 V
• Number of Outputs: 16
• Maximum Output Current: 25 mA per channel
• Interface: I2C-bus
• Package Type: SO-24
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The PCA9674BS,118 features a total of 24 pins. The pin configuration is as follows:

1. SDA - Serial Data Input/Output
2. SCL - Serial Clock Input
3. A0 - Address Input Bit 0
4. A1 - Address Input Bit 1
5. A2 - Address Input Bit 2 6-21. O0-O15 - LED Output Channels
6. VDD - Supply Voltage
7. GND - Ground
8. RESET - Reset Input

Functional Features

• Individual brightness control for each LED output.
• High sink current capability of up to 25 mA per channel.
• Compatibility with both 2.5 V and 3.3 V logic levels.
• Power-on reset and software reset functions for reliable operation.
• I2C-bus interface for easy integration into various systems.

Advantages and Disadvantages

Advantages

• Efficient control and driving of multiple LEDs.
• Individual brightness control allows for versatile lighting effects.
• Wide supply voltage range enables compatibility with different power sources.
• Compact package size for space-constrained applications.
• Easy integration into systems using the I2C-bus interface.

Disadvantages

• Limited maximum output current per channel (25 mA).
• Requires external resistors for setting LED currents.
• Not suitable for high-power LED applications.

Working Principles

The PCA9674BS,118 operates by receiving commands and data through the I2C-bus interface. It utilizes PWM to control the brightness of individual LEDs connected to its output channels. The device sinks current from the LEDs, allowing them to be driven at a constant current level. By adjusting the duty cycle of the PWM signal, the brightness of each LED can be controlled independently.

Detailed Application Field Plans

The PCA9674BS,118 finds applications in various fields, including but not limited to:

1. Automotive lighting systems
2. Display backlighting
3. Signage and advertising displays
4. Decorative lighting
5. Consumer electronics
6. Industrial control panels
7. Medical equipment

Detailed and Complete Alternative Models

1. PCA9685PW,118 - 16-channel I2C-bus controlled LED driver
2. TLC5940NT - 16-channel constant-current LED driver
3. MAX7219ENG+ - 8-digit LED display driver with I2C interface
4. AS1130-BQFT - 132 LED matrix driver with integrated keypad scanner

These alternative models offer similar functionality and can be considered as alternatives to the PCA9674BS,118 depending on specific requirements.

In conclusion, the PCA9674BS,118 is a versatile LED driver IC that provides efficient control and driving of multiple LEDs. With its individual brightness control, wide supply voltage range, and easy integration through the I2C-bus interface, it finds applications in various fields such as automotive lighting, display backlighting, and consumer electronics. While it has limitations in terms of maximum output current and suitability for high-power LED applications, there are alternative models available to suit different needs.