Overview
The PCA9532PW,118 is a 16-bit I2C-bus and SMBus I/O expander produced 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 with two user-programmable blink rates and duty cycles, allowing for precise control over LED brightness.
Key Specifications
| Attribute | Value |
|---|---|
| Interface Type | I2C/SMBus |
| Clock Frequency - Max | 400 kHz |
| No of I/O Lines | 16 |
| Supply Voltage - Nominal | 2.3 V to 5.5 V |
| Supply Current | 350 µA (nominal), 550 µA (max) |
| Package Style | TSSOP-24 |
| Mounting Method | Surface Mount |
| Operating Temperature | -40°C to 85°C |
| Output Current per Channel | 25 mA |
| RoHS Compliance | Yes |
Key Features
- 16 LED drivers with programmable on, off, and flashing modes
- Two selectable, fully programmable blink rates (frequency and duty cycle)
- 256 brightness steps for precise LED dimming
- Input/outputs not used as LED drivers can be used as regular GPIOs
- Internal oscillator requires no external components
- I2C-bus interface logic compatible with SMBus
- Internal power-on reset and active LOW reset input
- 16 open-drain outputs directly drive LEDs to 25 mA
- Controlled edge rates to minimize ground bounce
- No glitch on power-up and supports hot insertion
- Low standby current
Applications
The PCA9532PW,118 is particularly suited for applications involving LED dimming, such as:
- RGB color mixing for display backlighting
- Backlight control in LCD displays
- General LED lighting control in various consumer and industrial devices
- ACPI power switches, sensors, push-buttons, alarm monitoring, and fan control
Q & A
- What is the PCA9532PW,118 used for?
The PCA9532PW,118 is used for dimming LEDs in 256 discrete steps, particularly for RGB color mixing and backlight applications.
- What is the maximum clock frequency of the PCA9532PW,118?
The maximum clock frequency is 400 kHz.
- How many I/O lines does the PCA9532PW,118 have?
The PCA9532PW,118 has 16 I/O lines.
- What is the supply voltage range of the PCA9532PW,118?
The supply voltage range is from 2.3 V to 5.5 V.
- Can the PCA9532PW,118 be used as a GPIO expander?
Yes, input/outputs not used as LED drivers can be used as regular GPIOs.
- Does the PCA9532PW,118 require external components for its internal oscillator?
No, the internal oscillator requires no external components.
- What is the maximum output current per channel of the PCA9532PW,118?
The maximum output current per channel is 25 mA.
- Is the PCA9532PW,118 RoHS compliant?
Yes, the PCA9532PW,118 is RoHS compliant.
- What is the operating temperature range of the PCA9532PW,118?
The operating temperature range is from -40°C to 85°C.
- Does the PCA9532PW,118 support hot insertion?
Yes, the PCA9532PW,118 supports hot insertion.
