Overview
The PCA9685BS,118 from NXP USA Inc. is a 16-channel, 12-bit PWM Fm+ I2C-bus LED controller, optimized for Red/Green/Blue/Amber (RGBA) color backlighting applications. This device is designed to provide precise control over LED brightness with its individual PWM controllers for each channel. It operates within a programmable frequency range and supports various addressing modes, making it versatile for complex lighting systems.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Channels | 16 |
| PWM Resolution | 12-bit (4096 steps) |
| PWM Frequency Range | 24 Hz to 1526 Hz |
| Output Type | Totem pole (sink 25 mA, source 10 mA at 5 V), software programmable open-drain |
| Output Enable (OE) | Active LOW |
| Hardware Address Pins | 6 pins, allowing up to 62 devices on the same I2C-bus |
| Internal Oscillator | 25 MHz typical |
| External Clock Input | Up to 50 MHz |
| Power Supply Voltage Range | 2.3 V to 5.5 V |
| Operating Temperature Range | -40°C to +85°C |
| Package Type | 28-VQFN Exposed Pad |
Key Features
- Individual 12-bit PWM controllers for each LED output with adjustable duty cycle from 0% to 100%.
- Programmable PWM frequency from 24 Hz to 1526 Hz.
- Output state change programmable on the Acknowledge or the STOP Command.
- Active LOW Output Enable (OE) input pin with programmable logic states.
- Software programmable I2C-bus addresses, including one LED All Call address and three LED Sub Call addresses.
- Software Reset feature through the I2C-bus.
- No output glitches on power-up and supports hot insertion.
- Low standby current and ESD protection exceeding 2000 V HBM.
Applications
The PCA9685BS,118 is ideal for various lighting applications, including RGBA color backlighting, LED strips, and other complex lighting systems. It is particularly useful in scenarios where precise control over multiple LEDs is required, such as in automotive lighting, consumer electronics, and industrial lighting solutions.
Q & A
- What is the PCA9685BS,118 used for? The PCA9685BS,118 is used as a 16-channel LED controller for precise control over LED brightness in various lighting applications.
- How many PWM channels does the PCA9685BS,118 have? The PCA9685BS,118 has 16 PWM channels.
- What is the PWM resolution of the PCA9685BS,118? The PWM resolution is 12-bit, providing 4096 steps.
- What is the frequency range of the PWM outputs? The PWM frequency range is from 24 Hz to 1526 Hz.
- What types of output configurations are supported? The device supports totem pole outputs (sink 25 mA, source 10 mA at 5 V) and software programmable open-drain outputs.
- How many devices can be connected to the same I2C-bus? Up to 62 devices can be connected using the 6 hardware address pins.
- What is the operating temperature range of the PCA9685BS,118? The operating temperature range is -40°C to +85°C.
- What is the power supply voltage range for the PCA9685BS,118? The power supply voltage range is 2.3 V to 5.5 V.
- Does the PCA9685BS,118 support hot insertion? Yes, it supports hot insertion.
- What kind of ESD protection does the PCA9685BS,118 have? The device has ESD protection exceeding 2000 V HBM, 200 V MM, and 1000 V CDM.
