AS3693AA

Product Brief

www.austriamicrosystems.com (mpa)

Revision 1.0 / 2007-11-25

1 - 3

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General Description

The AS3693A is a 16 cannels high precision LED

driver with build in PWM generators for building

backlight panels in LCD-TV-sets.

External clock and synchronizing inputs allow the

synchronization of the LCD backlight with the TV

picture. Local dimming and scan dimming is

supported by 16 independent PWM generators with

programmable delay, period and duty cycle. Three

free configurable dynamic power feedback circuits

make the device usable for white LED as well as

RGB backlights. Build in safety features include

thermal shutdown as well as open and short LED

detection. All circuit parameters are programmable

via I2C or SPI interface.

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Key Features

16 independent LED channels

Output current 70mA

Output voltage up to 50V

Absolute current accuracy ±0.5%

Output slew rate limited to reduce EMI

Current programmable with external resistor

16 independent PWM generators with 12 bit

resolution

H-Sync, F-Sync inputs to synchronize with TV-

set

Three independent power feedback for R-, G-,

B-supply regulation

Build in 5V shunt regulator

I2C or SPI interface with 6 bit address

Fault interrupt output

Open LED detection

Short LED detection

Temperature shutdown

Package epTQFP64

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Application

LED Backlighting for LCD – TV Sets and Monitors

AS3693A

16 channel high precision LED driver for LCD backlight

Product Brief