PCA9635PW/Q900,118

Product Summary

The PCA9635PW/Q900,118 is an I2C-bus controlled 16-bit LED driver optimized for Red/Green/Blue/Amber (RGBA) color mixing applications. Each LED output has its own 8-bit resolution (256 steps) fixed frequency individual PWM controller that operates at 97 kHz with a duty cycle that is adjustable from 0 % to 99.6 % to allow the LED to be set to a specific brightness value. An additional 8-bit resolution (256 steps) group PWM controller has both a fixed frequency of 190 Hz and an adjustable frequency between 24 Hz to once every 10.73 seconds with a duty cycle that is adjustable from 0 % to 99.6 % that is used to either dim or blink all LEDs with the same value. The applications of the PCA9635PW/Q900,118 are (1)RGB or RGBA LED drivers; (2)LED status information; (3)LED displays; (4)LCD backlights; (5)Keypad backlights for cellular phones or handheld devices.

Parametrics

PCA9635PW/Q900,118 absolute maximum ratings: (1)VDD supply voltage: -0.5 to +6.0 V; (2)VI/O voltage on an input/output pin VSS: - 0.5 to 5.5 V; (3)IO(LEDn) output current on pin LEDn: - 25 mA; (4)ISS ground supply current: 400 mA; (5)Ptot total power dissipation: 400 mW; (6)Tstg storage temperature: -65 to +150℃; (7)Tamb ambient temperature operating: -40 to +85℃.

Features

PCA9635PW/Q900,118 features: (1)1 MHz Fast-mode Plus compatible I2C-bus interface with 30 mA high drive capability on SDA output for driving high capacitive buses; (2)256-step (8-bit) linear programmable brightness per LED output varying from fully off (default) to maximum brightness using a 97 kHz PWM signal; (3)256-step group brightness control allows general dimming (using a 190 Hz PWM signal) from fully off to maximum brightness (default); (4)256-step group blinking with frequency programmable from 24 Hz to 10.73 s and duty cycle from 0 % to 99.6 %; (5)Sixteen totem-pole outputs (sink 25 mA and source 10 mA at 5 V) with software; (6)programmable open-drain LED outputs selection (default at totem-pole). No input function.

Diagrams