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
|
Overview
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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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