PCA9685 16-Channel 12-Bit PWM/Servo Driver I2C Interface

Product Description

• If you’re building a robot with numerous moving parts or need to control multiple LEDs using PWM outputs, you may find the limited PWM channels on your microcontroller to be a significant hurdle. The solution is simple: use a 16-Channel 12-Bit PWM/Servo Driver.
• This driver allows you to manage 16 free-running PWM outputs with just 2 pins. Plus, you can daisy-chain up to 62 of these drivers, enabling control of a total of 992 PWM outputs.
• As an I2C-controlled PWM driver with a built-in clock, it operates independently without requiring constant signals from your microcontroller, allowing for greater flexibility in your project.
• It’s 5V compliant, so you can use it with a 3.3V microcontroller while safely driving outputs up to 6V. This is particularly useful for powering white or blue LEDs that have forward voltages of 3.4V or higher. With 6 address select pins, you can easily connect up to 62 drivers on a single I2C bus, giving you a total of 992 outputs at your disposal.

Features 

• This board/chip uses I2C 7-bit address between 0x60-0x80, selectable with jumpers
• Terminal block for power input (or you can use the 0.1″ breakouts on the side)
• Reverse polarity protection on the terminal block input
• Green power-good LED
• 3 pin connectors in groups of 4 so you can plug in 16 servos at once (Servo plugs are slightly wider than 0.1″ so you can only stack 4 next to each other on 0.1″ header
• “Chain-able” design
• A spot to place a big capacitor on the V+ line (in case you need it)
• 220 ohm series resistors on all the output lines to protect them, and to make driving LEDs trivial
• Solder jumpers for the 6 address select pins
• i2c-controlled PWM driver with a built in clock. Unlike the TLC5940 family, you do not need to continuously send it signal tying up your microcontroller, its completely free running!
• It is 5V compliant, which means you can control it from a 3.3V microcontroller and still safely drive up to 6V outputs (this is good for when you want to control white or blue LEDs with 3.4+ forward voltages)
• 6 address select pins so you can wire up to 62 of these on a single i2c bus, a total of 992 outputs – that’s a lot of servos or LEDs
• Adjustable frequency PWM up to about 1.6 KHz
• 12-bit resolution for each output – for servos, that means about 4us resolution at 60Hz update rate
• Configurable push-pull or open-drain output
• Output enable pin to quickly disable all the outputs

Specifications: