Overview
The PCA9634D, produced by NXP USA Inc., is an 8-bit Fast-mode Plus (Fm+) I²C-bus LED driver. This device is optimized for Red/Green/Blue/Amber (RGBA) color mixing applications, making it ideal for various lighting and display systems. The PCA9634D operates with a supply voltage range of 2.3 V to 5.5 V and features outputs that are 5.5 V tolerant, allowing LEDs to be directly connected or controlled with external drivers for larger current or higher voltage requirements.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltage Range | 2.3 V to 5.5 V |
| Output Voltage Tolerance | Up to 5.5 V |
| Output Current per Channel | 25 mA |
| Number of Outputs | 8 |
| Package Type | 20-SOIC (0.295", 7.50mm Width) |
| Operating Temperature Range | -40°C to +85°C |
| I²C-Bus Frequency | Up to 1 MHz |
| Internal Oscillator Frequency | 25 MHz |
| Dimming Control | I²C |
| Lead Free Status / RoHS Status | Lead free / RoHS Compliant |
Key Features
- 8-bit Fm+ I²C-bus LED driver optimized for RGBA color mixing applications.
- Each LED output has its own 8-bit brightness control, allowing for precise dimming and color mixing.
- Active LOW Output Enable input pin (OE) for asynchronous control of LED outputs and external PWM control.
- Software programmable LED Group and three Sub Call I²C-bus addresses for flexible addressing and control.
- Seven hardware address pins allowing up to 126 devices to be connected to the same I²C-bus.
- Internal power-on reset and noise filter on SDA/SCL inputs.
- Edge rate control on outputs.
- Software Reset feature (SWRST Call) for resetting the device through the I²C-bus.
Applications
- Backlighting systems for displays and signage.
- RGBA color mixing for LED lighting and display applications.
- Automotive lighting systems.
- Industrial and consumer electronics requiring precise LED control.
Q & A
- What is the supply voltage range of the PCA9634D?
The supply voltage range of the PCA9634D is 2.3 V to 5.5 V.
- How many outputs does the PCA9634D have?
The PCA9634D has 8 outputs.
- What is the maximum output current per channel?
The maximum output current per channel is 25 mA.
- What is the operating temperature range of the PCA9634D?
The operating temperature range is -40°C to +85°C.
- Is the PCA9634D RoHS compliant?
Yes, the PCA9634D is lead free and RoHS compliant.
- What is the maximum I²C-bus frequency supported by the PCA9634D?
The PCA9634D supports I²C-bus frequencies up to 1 MHz.
- Does the PCA9634D have internal power-on reset and noise filtering?
Yes, the PCA9634D features internal power-on reset and noise filtering on SDA/SCL inputs.
- Can the PCA9634D be reset through the I²C-bus?
Yes, the PCA9634D has a Software Reset feature (SWRST Call) for resetting the device through the I²C-bus.
- 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 Output Enable (OE) pin?
The Output Enable (OE) pin allows asynchronous control of the LED outputs and can be used for external PWM control.
