Overview
The PCA9531PW112, produced by NXP USA Inc., is an 8-bit I²C-bus and SMBus I/O expander specifically designed for LED dimming applications. This component is optimized for controlling LEDs in various configurations, including Red/Green/Blue (RGB) color mixing and backlighting. It offers a versatile solution for expanding the I/O capabilities of microcontrollers in a wide range of applications.
Key Specifications
| Parameter | Value |
|---|---|
| Number of I/O Bits | 8 |
| Interface | I²C-bus, SMBus |
| Dimming Steps | 256 discrete steps |
| LED Control | RGB color mixing, backlighting |
| Operating Voltage | 2.3 V to 5.5 V |
| Package Type | TSSOP16 |
| Clock Frequency | 0 Hz to 400 kHz |
| ESD Protection | Exceeds 2000 V HBM, 200 V MM, 1000 V CDM |
Key Features
- 8-bit I/O expander with I²C-bus and SMBus interface
- 256 discrete dimming steps for precise LED control
- Optimized for RGB color mixing and backlighting applications
- Operating voltage range of 2.3 V to 5.5 V
- 5 V tolerant I/Os
- Low standby current and internal power-on reset
- No glitch on power-up and noise filter on SCL/SDA inputs
Applications
- LED backlighting in displays and signage
- RGB LED lighting systems for various color effects
- Automotive lighting systems
- Consumer electronics such as TVs, monitors, and mobile devices
- Industrial control panels and human-machine interfaces
Q & A
- What is the PCA9531PW112 used for? The PCA9531PW112 is used for expanding the I/O capabilities of microcontrollers, particularly for LED dimming and control in RGB and backlighting applications.
- How many dimming steps does the PCA9531PW112 support? It supports 256 discrete dimming steps.
- What is the operating voltage range of the PCA9531PW112? The operating voltage range is from 2.3 V to 5.5 V.
- What interface does the PCA9531PW112 use? It uses the I²C-bus and SMBus interface.
- Is the PCA9531PW112 5 V tolerant? Yes, the I/Os are 5 V tolerant.
- What is the clock frequency range of the PCA9531PW112? The clock frequency range is from 0 Hz to 400 kHz.
- Does the PCA9531PW112 have ESD protection? Yes, it exceeds 2000 V HBM, 200 V MM, and 1000 V CDM.
- What package type is the PCA9531PW112 available in? It is available in a TSSOP16 package.
- What are some common applications of the PCA9531PW112? Common applications include LED backlighting, RGB LED lighting systems, automotive lighting, and industrial control panels.
- Does the PCA9531PW112 have an internal power-on reset? Yes, it has an internal power-on reset.
