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AS3693A QFN48
austria micro systems
Product Specification, Confidential
AS3693A –16 Channel high precision LED driver for
LCD Backlight
1 General Description
The AS3693A is a 16 channels 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 Channel LED driver
Output current 70mA (150mA) per channel
Output voltage 0.4V to 50V
Absolute current accuracy +/- 0.5%
Output slew rate programmable
Current programmable with external resistor
Linear current control with 8 - bit DAC
Linear current control with external analog
Free programmable 12 bit resolution ( period,
high time and delay )
Overvoltage detection ( short LED )
Undervoltage detection ( open LED )
Temperature shutdown
Fault interrupt output
H-Sync, V-Sync inputs to synchronize with TV-
set
Internal or external PWM – clock
I2C interface
SPI interface
5 bit device - address (sets device address
and interface mode)
Automatic supply regulation feedback
Each output can be assigned to red, green or
blue feedback.
Package QFN48 6x6mm, 0.4mm pitch,
QFN48 7x7mm, 0.5mm pitch
voltage
Digital current control with 16 independent
PWM generators
3 Applications
?
LED backlighting for LCD – TV sets and
monitors
www.austriamicrosystems.com
Revision 1.14 / 2010
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