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PCA9530

Part Number	PCA9530
Manufacturer	NXP Semiconductors
Description	2-bit I2C-bus LED dimmer
Published	Jul 17, 2010
Detailed Description	www.DataSheet4U.com PCA9530 2-bit I2C-bus LED dimmer Rev. 03 — 26 February 2009 Product data sheet 1. General descript...
Datasheet	PCA9530 PDF File

Overview

www.
DataSheet4U.
com PCA9530 2-bit I2C-bus LED dimmer Rev.
03 — 26 February 2009 Product data sheet 1.
General description The PCA9530 is a 2-bit I2C-bus and SMBus I/O expander optimized for dimming LEDs in 256 discrete steps for Red/Green/Blue (RGB) color mixing and backlight applications.
The PCA9530 contains an internal oscillator with two user programmable blink rates and duty cycles coupled to the output PWM.
The LED brightness is controlled by setting the blink rate high enough (> 100 Hz) that the blinking cannot be seen and then using the duty cycle to vary the amount of time the LED is on and thus the average current through the LED.
The initial setup sequence programs the two blink...

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