Overview
The PCA9532BS,118 is a 16-bit I²C-bus and SMBus I/O expander designed by NXP USA Inc. This component is optimized for dimming LEDs in 256 discrete steps, making it ideal for Red/Green/Blue (RGB) color mixing and backlight applications. It features an internal oscillator and supports programmable blink rates and duty cycles, allowing for precise control over LED brightness and behavior.
Key Specifications
| Specification | Value |
|---|---|
| Number of Bits | 16 |
| Interface | I²C-bus and SMBus |
| LED Drivers | 16 (on, off, flashing at programmable rates) |
| Brightness Steps | 256 |
| Blink Rates | Two selectable, fully programmable (0.591 Hz to 152 Hz) |
| Output Current | Up to 25 mA per LED |
| Power Supply Voltage | 2.3 V to 5.5 V |
| Package Type | HVQFN-16 |
| Operating Temperature | -40°C to +85°C |
| ESD Protection | Exceeds 2000 V HBM, 150 V MM, 1000 V CDM |
Key Features
- Internal oscillator with no external components required
- Two user-programmable blink rates and duty cycles
- 256 brightness steps for precise LED control
- Input/outputs not used as LED drivers can be used as regular GPIOs
- I²C-bus interface logic compatible with SMBus
- Internal power-on reset (POR) and active LOW hardware reset pin
- No glitch on power-up and controlled edge rates to minimize ground bounce
- Supports hot insertion and low standby current
- Noise filter on SCL/SDA inputs
Applications
The PCA9532BS,118 is suitable for various applications including:
- RGB color mixing and backlight control
- LED dimming in automotive, industrial, and consumer electronics
- ACPI power switches, sensors, push-buttons, alarm monitoring, and fan control
- General-purpose I/O expansion in embedded systems
Q & A
- What is the PCA9532BS,118 used for?
The PCA9532BS,118 is used for dimming LEDs in 256 discrete steps, particularly for RGB color mixing and backlight applications. - What interfaces does the PCA9532BS,118 support?
The PCA9532BS,118 supports I²C-bus and SMBus interfaces. - How many LED drivers does the PCA9532BS,118 have?
The PCA9532BS,118 has 16 LED drivers. - What is the range of programmable blink rates?
The blink rates are programmable between 0.591 Hz and 152 Hz. - What is the maximum output current per LED?
The maximum output current per LED is up to 25 mA. - What is the operating voltage range of the PCA9532BS,118?
The operating voltage range is from 2.3 V to 5.5 V. - What type of package does the PCA9532BS,118 come in?
The PCA9532BS,118 comes in an HVQFN-16 package. - Does the PCA9532BS,118 have internal power-on reset?
Yes, the PCA9532BS,118 has an internal power-on reset (POR). - Is the PCA9532BS,118 ESD protected?
Yes, it exceeds 2000 V HBM, 150 V MM, and 1000 V CDM. - Can the PCA9532BS,118 be used for general-purpose I/O expansion?
Yes, the PCA9532BS,118 can be used for general-purpose I/O expansion in embedded systems.
