Overview
The PCA9530DP, produced by NXP USA Inc., is a 2-bit I²C-bus and SMBus I/O expander specifically designed for dimming LEDs. This component is optimized for applications involving Red/Green/Blue (RGB) color mixing and backlight control. It features an internal oscillator and supports 256 discrete brightness steps, making it versatile for various lighting applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VDD) | 2.3 to 5.5 | V |
| Operating Temperature (Tamb) | -40 to +85 | °C |
| Clock Frequency | 0 Hz to 400 kHz | Hz |
| Brightness Steps | 256 | - |
| Blink Rates/Duty Cycles | 0.591 Hz to 152 Hz (1.69 seconds to 6.58 milliseconds) | Hz |
| Output Current per LED | Up to 25 mA | mA |
| ESD Protection | 2000 V HBM, 150 V MM, 1000 V CDM | V |
| Package Type | TSSOP-8 | - |
Key Features
- 2-bit I²C-bus and SMBus I/O expander optimized for LED dimming.
- 256 discrete brightness steps for RGB color mixing and backlight applications.
- Internal oscillator with two user-programmable blink rates and duty cycles.
- Active LOW hardware reset pin (RESET) and Power-On Reset (POR).
- One hardware address pin allows two devices to operate on the same bus.
- I²C-bus interface logic compatible with SMBus.
- Noise filter on SCL/SDA inputs.
- Edge rate control on outputs.
- No glitch on power-up.
- Supports hot insertion.
- Low standby current.
Applications
- RGB color mixing and backlight control in displays and lighting systems.
- LED dimming in automotive, industrial, and consumer electronics.
- Sensors, push buttons, alarm monitoring, and fan control.
- General-purpose I/O expansion in various embedded systems.
Q & A
- What is the PCA9530DP used for?
The PCA9530DP is used for dimming LEDs in 256 discrete steps, particularly for RGB color mixing and backlight applications.
- What is the operating voltage range of the PCA9530DP?
The operating voltage range is from 2.3 V to 5.5 V.
- How many brightness steps does the PCA9530DP support?
The PCA9530DP supports 256 discrete brightness steps.
- What are the programmable blink rates and duty cycles of the PCA9530DP?
The PCA9530DP has two user-programmable blink rates and duty cycles ranging from 0.591 Hz to 152 Hz (1.69 seconds to 6.58 milliseconds).
- What is the maximum output current per LED for the PCA9530DP?
The maximum output current per LED is up to 25 mA.
- Does the PCA9530DP support hot insertion?
- What type of package does the PCA9530DP come in?
The PCA9530DP comes in a TSSOP-8 package.
- What is the ESD protection level of the PCA9530DP?
The ESD protection level exceeds 2000 V HBM, 150 V MM, and 1000 V CDM.
- Can the PCA9530DP be used as a general-purpose I/O expander?
- How does the PCA9530DP handle power-on reset?
The PCA9530DP has an internal Power-On Reset (POR) that initializes the registers to their default states when power is applied.
