Overview
The PCA9532D,118 from NXP USA Inc. is a 16-bit I2C-bus and SMBus I/O expander specifically optimized for dimming LEDs in various applications. This component is designed to control LED brightness with high precision, making it ideal for Red/Green/Blue (RGB) color mixing and backlighting. The PCA9532D features an internal oscillator with two user-programmable blink rates and duty cycles, allowing for flexible LED control without the need for external components.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 16 |
| I2C-bus Interface | Compatible with SMBus |
| Blink Rates | Two selectable, fully programmable (0.591 Hz to 152 Hz) |
| Brightness Steps | 256 discrete steps |
| Output Current | Up to 25 mA per LED |
| Power Supply Voltage | 2.3 V to 5.5 V |
| Clock Frequency | 0 Hz to 400 kHz |
| Package Options | SO24, TSSOP24, HVQFN24 |
| Operating Temperature | -40°C to +85°C |
| ESD Protection | Exceeds 2000 V HBM, 150 V MM, 1000 V CDM |
Key Features
- 16 LED drivers with programmable on, off, and blinking at two different rates
- Internal oscillator eliminates the need for external components
- 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 and active LOW reset input
- I/O pins not used as LED drivers can be used as general-purpose I/Os (GPIOs)
- Three hardware address pins allowing up to eight devices on the same bus
Applications
The PCA9532D is widely used in various applications including:
- RGB color mixing and backlighting
- LED dimming and control in automotive, industrial, and consumer electronics
- ACPI power switches, sensors, push-buttons, alarm monitoring, and fan control
Q & A
- What is the PCA9532D used for?
The PCA9532D is used for controlling and dimming LEDs, particularly in RGB color mixing and backlight applications. - How many brightness steps does the PCA9532D support?
The PCA9532D supports 256 discrete brightness steps. - What is the range of the 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 are the package options for the PCA9532D?
The PCA9532D is available in SO24, TSSOP24, and HVQFN24 packages. - What is the operating temperature range of the PCA9532D?
The operating temperature range is -40°C to +85°C. - Does the PCA9532D support hot insertion?
Yes, the PCA9532D supports hot insertion. - Can unused I/O pins be used as GPIOs?
Yes, I/O pins not used as LED drivers can be used as general-purpose I/Os (GPIOs). - How many devices can be operated on the same bus?
Up to eight devices can operate on the same bus using the three hardware address pins. - What is the ESD protection level of the PCA9532D?
The ESD protection exceeds 2000 V HBM, 150 V MM, and 1000 V CDM.
