as3693b austriamicrosystems, as3693b Datasheet

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as3693b

Manufacturer Part Number
as3693b
Description
16 Channel High Precision Led Controller For Lcd Backlight
Manufacturer
austriamicrosystems
Datasheet

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1 General Description
The AS3693B is a 16 cannels high precision LED
controller with build in PWM generators for driving
external FETs in LCD-backlight panels.
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
www.austriamicrosystems.com (mpa)
AS3693B
16 channel high precision LED controller for LCD backlight
( External FET )
Product Brief
AS3693AB
16 independent LED channels
External FET control and current sensing
Output voltage sense up to 50V
Absolute current accuracy ±0.5%
Revision 1.0 / 2008-06-26
3 Application
LED Backlighting for LCD – TV Sets and Monitors
Output slew rate limited to reduce EMI
Current programmable with external resistor
16 independent PWM generators with 12 bit
resolution
H-Sync, V-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 5 bit device address
Fault interrupt output
Open LED detection
Short LED detection
Temperature shutdown
Package epTQFP64
Product Brief
1 - 3

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as3693b Summary of contents

Page 1

... General Description AS3693B 16 channel high precision LED controller for LCD backlight ( External FET ) The AS3693B cannels high precision LED controller with build in PWM generators for driving external FETs in LCD-backlight panels. External clock and synchronizing inputs allow the synchronization of the LCD backlight with the TV picture ...

Page 2

... AS3693AB Product Brief www.austriamicrosystems.com (mpa) Block Diagram Vsupply Reference, PWM PWM DAC Fault detectors PWM PWM SMPS feedback PWM PWM PWM PWM AS3693B PWM PWM PWM PWM 86 byte PWM PWM registers PWM PWM SPI / I2C Interface Revision 1.0 / 2008-06-26 V2_5 ...

Page 3

... The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein ...

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