EEWORLDEEWORLDEEWORLD

Part Number

Search

AAT2405ISF-P1

Description
6ch edge lighting led 44lqfp
Categorysemiconductor    Analog mixed-signal IC   
File Size234KB,3 Pages
ManufacturerSkyworks
Websitehttp://www.skyworksinc.com
Environmental Compliance  
Download Datasheet View All

AAT2405ISF-P1 Overview

6ch edge lighting led 44lqfp

PRODUCT SUMMARY
AAT2405
Six-Channel White LED Driver for LCD TV Edge Lighting
General Description
The AAT2405 is a highly integrated, high efficiency white
LED backlight solution for large size LCD panels used in
LCD TVs. This device operates from a wide 10.8V to 28V
DC power source, making it ideal for operation with com-
mon 12V to 24V AC-DC power supplies used in LCD TV
panels.
By controlling external power MOSFETs (such as the
Skyworks' AAT2490 high-voltage TrenchDMOS array),
the AAT2405 facilitates 6 current sink channels to pro-
vide precision constant-current drive for strings of white
LEDs, where the number of series-connected LEDs per
string is only limited by the system LED voltage supply.
Current in each backlight string and string-to-string
matching is controlled using I-Precise™ sensing and con-
trol circuitry, a novel on-chip method to accurately con-
trol drain current in external discrete power MOSFETs
independent of their construction and without the need
for precision sense resistors.
LED string dimming is achieved by applying an external
PWM signal to the AAT2405's PWMIN input pin. An inter-
nal clock and programmable phase delay function allow
accurate PWM phase adjustment to each current sink or
selectable banks of current sinks. The AAT2405 has sig-
nal feed through function outputs for PWM dimming and
the internal clock signals allow cascaded AAT2405 devic-
es to successively synchronize for both channel phase
and timing. The AAT2405's constant current sinks may
be set for phase delays individually or in banks of 2 or 3
LED strings.
The AAT2405 provides a current sense feedback input
and output feed through function so the LED string volt-
age level can be fed back to an external high voltage
boost converter. This function permits as many AAT2405s
as needed to be cascaded from a single power source.
An additional ICSFB output enables accurate feedback
using generic SMPS converters.
An IC enable pin is provided as a master LED on/off
function that may be toggled by an external system con-
troller.
The AAT2405 provides an active low fault output. If an
LED short or open circuit is detected or if an over-temper-
ature condition arises, the fault is reported on the FAULT
pin. Thermal protection circuitry shuts down the current
sinks in the event of an over-temperature condition.
The AAT2405 is available in the Pb-free 44 pin 10x10mm
E-LQFP package with exposed pad.
Features
V
IN
Range: 10.8V – 28V
6 LED Current Sinks up to 250mA/ch
±1.5% Accuracy @ 25°C (100mA)
±1.5% Matching @ 25°C (100mA)
Maximum LED Current Set Resistor
Linear Current Sink Calibration Input
External PWM Dimming
PWM Input Defined Period
50Hz to 20kHz PWM Input Frequency Range
Wide PWM Dimming Range
Cascade Multiple ICs:
PWM Signal Feed Through: PWMIN / PWMOUT
Chip to Chip Phase Delay Tracking
PWM Clock SYNC Function
Regulated Sink Voltage Feedback: CSFBI / CSFBO
Programmable PWM Phase Delay
0° to 180° User Set by Resistor
Typical ±10% Accuracy
IC/LED On/Off Enable
Integrated Fault Detection
Open LED (<0.3V)
Short Circuit LED (>6V)
Over-Temperature Protection
Soft-Start to Minimize Inrush Current
44 Pin E-LQFP10 Package
-40°C to +85°C Temperature Range
Applications
Converting LCD TV CCFL to LED Backlighting
Large Size LCD TV Panels
LCD Monitors
Multiple String White LED Drive Applications
White LED Backlighting
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202188A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 18, 2012
1
MSP430F5529 multi-channel PWM output control servo and motor
MSP430F5529 has rich timer resources. This time I bring you a multi-channel PWM wave output, which can control the servo. Of course, after simple modification, it can also control the motor. The exper...
火辣西米秀 Microcontroller MCU
What is the relationship between filter capacitor inductance and voltage and current?
What is the calculation formula? Thanks!...
hjbb Discrete Device
About vector conversion tools!
Hello everyone: I would like to know if there is any new vector conversion tool, similar to VTRAN, Testinsight, which can convert simulation vectors into vector formats suitable for ATE equipment. Ple...
firstyf FPGA/CPLD
Why can't the file sent by SSCOM32 be larger than 512K?
Recently I used SSCOM32 to send a 1M BIN file to ARM. It turned out that the file could only be sent to 0X80000 (512K) and then stopped. If the file was smaller than 512K, it would be normal. This mea...
msy2009 Embedded System
[Code Download] AD7949 Code
AD7949 code...
dontium ADI Reference Circuit
LaunchPad Flash is not enough
Some time ago, a classmate asked me to use LaunchPad to help with a graduation project. I finally overcame the problem of insufficient pins (the graduation project required 1602 for display, Sht11 to ...
renzhejiajia Microcontroller MCU

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 1248  2487  2729  432  526  26  51  55  9  11 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号