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CAT9532

Part Number	CAT9532
Manufacturer	ON Semiconductor
Description	16-bit Programmable LED Dimmer
Published	Aug 9, 2010
Detailed Description	CAT9532 16-bit Programmable LED Dimmer with I2C Interface Description The CAT9532 is a CMOS device that provides 16−bit...
Datasheet	CAT9532 PDF File

Overview

CAT9532 16-bit Programmable LED Dimmer with I2C Interface Description The CAT9532 is a CMOS device that provides 16−bit parallel input/output port expander optimized for LED dimming control.
The CAT9532 outputs can drive directly 16 LEDs in parallel.
Each individual LED may be turned ON, OFF, or blinking at one of two programmable rates.
The device provides a simple solution for dimming LEDs in 256 brightness steps for backlight and color mixing applications.
The CAT9532 is suitable in I2C and SMBus compatible applications where it is necessary to limit the bus traffic or free−up the bus master’s timer.
The CAT9532 contains an internal oscillator and two PWM signals that drive the LED outputs.
The user can program the period and duty cycle for each individual PWM signal.
After the initial set−up command to program the Blink Rate 1 and Blink Rate 2 (frequency and duty cycle), only one command from the bus master is required to turn each individual open drain output ON, OFF, or cycle at...

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