as3693 austriamicrosystems, as3693 Datasheet

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as3693

Manufacturer Part Number
as3693
Description
16 Channel High Precision Led Driver For Lcd Backlight
Manufacturer
austriamicrosystems
Datasheet
1.AS3693.pdf (3 pages)

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1 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.
2 Key Features
www.austriamicrosystems.com (mpa)
AS3693A
16 channel high precision LED driver for LCD backlight
Product Brief
AS3693AA
16 independent LED channels
Output current 70mA
Output voltage up to 50V
Absolute current accuracy ±0.5%
Revision 1.0 / 2007-11-25
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, 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
Product Brief
1 - 3

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as3693 Summary of contents

Page 1

... Product Brief 1 General Description AS3693A 16 channel high precision LED driver for LCD backlight The AS3693A 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 ...

Page 2

... AS3693AA Product Brief www.austriamicrosystems.com (mpa) Block Diagram Vsupply PWM PWM SMPS feedback Fault detectors PWM PWM Reference, DAC PWM PWM PWM PWM AS3693 PWM PWM PWM PWM 86 byte PWM registers PWM PWM PWM SPI / I2C Interface Revision 1.0 / 2007-11-25 V2_5 ...

Page 3

... AS3693AA Product Brief Copyright Copyright © 1997-2007, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria- Europe. Trademarks Registered ®. All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies. ...

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