Overview
The PCA9634PW/S910,118, produced by NXP USA Inc., is an I²C-bus controlled 8-bit LED driver optimized for Red/Green/Blue/Amber (RGBA) color mixing applications. This device is part of the Fast-mode Plus (Fm+) family, offering higher frequency and more densely populated bus operation. It is designed to provide precise control over LED brightness and color, making it suitable for a variety of lighting applications.
Key Specifications
| Parameter | Description |
|---|---|
| Number of LED Outputs | 8 |
| Resolution per LED Output | 8-bit (256 steps) |
| Individual PWM Frequency | 97 kHz |
| Group PWM Frequency | 190 Hz (adjustable from 24 Hz to once every 10.73 seconds) |
| Duty Cycle Range | 0% to 99.6% |
| Supply Voltage Range | 2.3 V to 5.5 V |
| Output Current Capability | 25 mA sink, 10 mA source at 5 V |
| Package Type | 20-TSSOP |
| Operating Temperature Range | -40°C to +85°C |
| I²C-Bus Frequency | Up to 1 MHz |
Key Features
- Individual and Group PWM control for precise brightness and color control.
- Each LED output has its own 8-bit resolution (256 steps) fixed frequency Individual PWM controller.
- Group PWM controller with adjustable frequency and duty cycle.
- Output drivers can be configured as open-drain or totem-pole with 25 mA current sink capability at 5 V.
- Active LOW Output Enable input pin (OE) for asynchronous control of LED outputs.
- Software programmable LED Group and three Sub Call I²C-bus addresses.
- Seven hardware address pins allowing up to 126 devices on the same I²C-bus.
- Internal power-on reset and noise filter on SDA/SCL inputs.
- 25 MHz internal oscillator requiring no external components.
Applications
- RGBA color mixing applications.
- LED lighting systems requiring precise color and brightness control.
- Automotive lighting systems.
- Display backlighting.
- General lighting applications where color and brightness need to be dynamically controlled.
Q & A
- What is the PCA9634PW/S910,118 used for?
The PCA9634PW/S910,118 is used for controlling LEDs in RGBA color mixing applications, providing precise control over brightness and color.
- What is the resolution of each LED output?
Each LED output has an 8-bit resolution (256 steps).
- What are the frequency ranges of the Individual and Group PWM controllers?
The Individual PWM controller operates at 97 kHz, while the Group PWM controller operates at 190 Hz (adjustable from 24 Hz to once every 10.73 seconds).
- What is the supply voltage range of the PCA9634PW/S910,118?
The supply voltage range is from 2.3 V to 5.5 V.
- What is the current capability of the output drivers?
The output drivers can sink up to 25 mA and source up to 10 mA at 5 V.
- How many devices can be connected to the same I²C-bus?
Up to 126 devices can be connected to the same I²C-bus using the seven hardware address pins.
- What is the purpose of the active LOW Output Enable input pin (OE)?
The active LOW Output Enable input pin (OE) allows asynchronous control of the LED outputs and can be used to externally PWM the outputs.
- Does the PCA9634PW/S910,118 require any external components for its internal oscillator?
No, the PCA9634PW/S910,118 has a 25 MHz internal oscillator that requires no external components.
- What are some common applications of the PCA9634PW/S910,118?
Common applications include RGBA color mixing, automotive lighting, display backlighting, and general lighting systems requiring dynamic color and brightness control.
- What is the operating temperature range of the PCA9634PW/S910,118?
The operating temperature range is from -40°C to +85°C.
