PCA9633DP1,118 Description

The PCA9633 is a 4-bit LED driver operated by the I2C bus that is designed for Red, Green, Blue, and Amber (RGBA) color mixing applications. To enable the LED to be set to a specified brightness level, each LED output has its own 8-bit resolution (256 steps) fixed frequency Individual PWM controller that runs at 97 kHz with a duty cycle that is changeable from 0% to 99.6%. A fifth 8-bit resolution (256 steps) Group PWM controller is used to dim or blink all LEDs with the same value. It has a fixed frequency of 190 Hz and an adjustable frequency range of 24 Hz to once every 10.73 seconds. It also has an adjustable duty cycle range of 0% to 99.6%.

PCA9633DP1,118 Features

Software Reset feature (SWRST Call) allows the device to be reset through the I2C-bus

25 MHz internal oscillator requires no external components

Internal power-on reset

Noise filter on SDA/SCL inputs

Edge rate control on outputs

No glitch 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

PCA9633DP1,118 Applications

RGB or RGBA LED drivers

LED status information

LED displays

LCD backlights

Keypad backlights for cellular phones or handheld devices