AS3693E-16 Datasheet, PDF (1/33 Pages) ams AG – 16 Channel LED driver

AS3693E
austriamicrosystems
Product Specification, Confidential
AS3693E–16 Channel high precision LED driver for
LCD Backlight
1 General Description
The AS3693E is a 16 channels high precision LED
controller with build in PWM generators for driving
external FETs in LCD-backlight panels.
The output current can be controlled either by an
external PWM signal or by 16 build in 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 only limited by external
transistor
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
voltage
Digital current control with external PWM signal
Digital current control with 16 independent
PWM generators
Free programmable 12 bit resolution ( period,
high time and delay )
Overvoltage detection ( short LED )
Undervoltage detection ( open LED )
Temperature shutdown
Fault interrupt output
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 epTQFP64 and QFN64
3 Applications
• LED backlighting for LCD – TV sets and
monitors
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Revision 1.5 / 2009-12-21
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