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16 Channel 12bit PWM Servo Driver I2C Interface PCA9685 for Arduino


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  1. PCA9685 16 Channel
  2. PWM PCA9685 16-Channel
  3. 12-bit PWM Servo motor Driver
  4. I2C Module
  5. For Arduino Robot in Pakistan

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PCA9685 16 Channel PWM

The PCA9685 16 Channel PWM is an I2C-bus controlled 16-channel LED controller optimize for LCD Red/Green/Blue/Amber (RGBA) color backlighting applications. Each LED output has its own 12-bit resolution (4096 steps) fix frequency individual PWM controller that operates at a programmable frequency from a typical of 40 Hz to 1000 Hz with a duty cycle that is adjustable from 0 % to 100 % to allow the LED to be set to a specific brightness value. All outputs are set to the same PWM frequency.

The PCA9685 allows stagger LED output on and off times to minimize current surges. The on and off time delay is independently programmable for each of the 16 channels. This feature is not available in PCA9635.
• The PCA9685 has 4096 steps (12-bit PWM) of individual LED brightness control. The PCA9635 has only 256 steps (8-bit PWM).
• When multiple LED controllers are incorporate in a system, the PWM pulse widths between multiple devices may differ if PCA9635s are use. The PCA9685 has a programmable presale to adjust the PWM pulse widths of multiple devices.

PCA9685 16 Channel PWM

25 MHz typical internal oscillator requires no external components
External 50 MHz (max.) clock input
Internal power-on reset
Noise filter on SDA/SCL inputs
Edge rate control on outputs
No output glitches on power-up
Supports hot insertion
Low standby current
Operating power supply voltage range of 2.3 V to 5.5 V
5.5 V tolerant inputs
40 C to +85 C operation
ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per
JESD22-A115 and 1000 V CDM per JESD22-C101

Packages offer: TSSOP28, HVQFN28

The PCA9685 allows stagger LED output on and off times to minimize current
surges. The on and off time delay is independently programmable for each of the
16 channels. This feature is not available in PCA9635.

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• The PCA9685 has 4096 steps (12-bit PWM) of individual LED brightness control. The
PCA9635 has only 256 steps (8-bit PWM). en.wikipedia.org

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