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AS3693A Datasheet, PDF (1/3 Pages) ams AG – 16 channel high precision LED driver for LCD backlight | |||
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AS3693AA
Product Brief
1 General Description
Product Brief
 Output slew rate limited to reduce EMI
AS3693A
16 channel high precision LED driver for LCD backlight
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.
2 Key Features
 16 independent LED channels
 Output current 70mA
 Output voltage up to 50V
 Absolute current accuracy ±0.5%
 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
3 Application
LED Backlighting for LCD â TV Sets and Monitors
www.austriamicrosystems.com (mpa)
Revision 1.0 / 2007-11-25
1-3
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