Overview
The PCA9634BS,118 is an I²C-bus controlled 8-bit LED driver produced by NXP USA Inc. This component is specifically optimized for Red/Green/Blue/Amber (RGBA) color mixing applications, making it ideal for various lighting and display systems. The PCA9634 features individual and group PWM control, allowing for precise brightness and color adjustments of the LEDs.
Key Specifications
| Parameter | Description |
|---|---|
| Number of LED Outputs | 8 |
| PWM Resolution | 8-bit (256 steps) |
| Individual PWM Frequency | 97 kHz |
| Group PWM Frequency | Fixed: 190 Hz, Adjustable: 24 Hz to once every 10.73 seconds |
| PWM Duty Cycle | 0% to 99.6% |
| Output Current Capability | 25 mA sink, 10 mA source at 5 V |
| Supply Voltage Range | 2.3 V to 5.5 V |
| Output Voltage Tolerance | Up to 5.5 V |
| I²C-Bus Frequency | Up to 1 MHz (Fast-mode Plus) |
| Package Type | 20-pin HVQFN (5x5 mm) |
| Operating Temperature Range | -40°C to +85°C |
Key Features
- Individual and group PWM control for each LED output, allowing for precise brightness and color adjustments.
- Active LOW Output Enable (OE) input pin for hardware blinking and dimming of LEDs.
- Seven hardware address pins and four software programmable I²C-bus addresses, enabling up to 126 devices to be connected to the same I²C-bus.
- LED outputs can be configured as open-drain or totem-pole with current sink and source capabilities.
- Support for direct connection of LEDs or control with external drivers for larger current or higher voltage LEDs.
- Fast-mode Plus (Fm+) I²C-bus operation with higher frequency and more densely populated bus capability.
Applications
- RGBA color mixing applications such as LED lighting, displays, and signage.
- Automotive lighting systems, including dashboard and ambient lighting.
- Consumer electronics, such as TVs, monitors, and gaming consoles.
- Industrial lighting and control systems.
- Smart home and IoT devices requiring advanced LED control.
Q & A
- What is the primary function of the PCA9634BS,118?
The PCA9634BS,118 is an I²C-bus controlled 8-bit LED driver optimized for RGBA color mixing applications.
- How many LED outputs does the PCA9634BS,118 have?
The PCA9634BS,118 has 8 LED outputs.
- What is the resolution of the PWM control for each LED output?
Each LED output has an 8-bit PWM resolution (256 steps).
- What are the frequency ranges for the individual and group PWM controllers?
The individual PWM controller operates at 97 kHz, while the group PWM controller has a fixed frequency of 190 Hz and an adjustable frequency between 24 Hz to once every 10.73 seconds.
- What is the maximum current capability of each LED output?
Each LED output can sink up to 25 mA and source up to 10 mA at 5 V.
- What is the supply voltage range for the PCA9634BS,118?
The supply voltage range is from 2.3 V to 5.5 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 hardware and software address pins.
- What is the operating temperature range of the PCA9634BS,118?
The operating temperature range is from -40°C to +85°C.
- What package type is the PCA9634BS,118 available in?
The PCA9634BS,118 is available in a 20-pin HVQFN (5x5 mm) package.
- Can the PCA9634BS,118 be used for high-voltage LEDs?
