PCA9634PW,118 LED照明驱动器

PCA9634PW,118

LED照明驱动器 8BIT I2C FM+ TP LED CON RST OE

8-bit Fm+ I2C-bus LED driver

General description  

The PCA9634PW PCA9634 is an I2C-bus controlled 8-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.

Features and benefits PCA9634PW

 1 MHz Fast-mode Plus compatible I2C-bus interface with 30 mA high drive capability

on SDA output for driving high capacitive buses

 256-step (8-bit) linear programmable brightness per LED output varying from fully off

(default) to maximum brightness using a 97 kHz PWM signal

 256-step group brightness control allows general dimming (using a 190 Hz PWM

signal) from fully off to maximum brightness (default)

 256-step group blinking with frequency programmable from 24 Hz to 10.73 s and duty

cycle from 0 % to 99.6 %

 Eight totem-pole outputs (sink 25 mA and source 10 mA at 5 V) with software

programmable open-drain LED outputs selection (default at totem-pole). No input

function.

Applications PCA9634PW

 RGB or RGBA LED drivers

 LED status information

 LED displays

 LCD backlights

 Keypad backlights for cellular phones or handheld devices