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A8500EECTR-T PDF预览

A8500EECTR-T

更新时间: 2024-11-09 03:17:07
品牌 Logo 应用领域
急速微 - ALLEGRO 驱动器
页数 文件大小 规格书
16页 1221K
描述
Flexible WLED/RGB Backlight Driver for Medium Size LCDs

A8500EECTR-T 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Obsolete零件包装代码:QFN
包装说明:HQCCN, LCC28,.16SQ,16针数:26
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:7.9
数据输入模式:SERIAL显示模式:DOT MATRIX
接口集成电路类型:LIQUID CRYSTAL DISPLAY DRIVERJESD-30 代码:S-XQCC-N26
JESD-609代码:e3长度:4 mm
湿度敏感等级:2复用显示功能:NO
功能数量:1区段数:8
端子数量:26最高工作温度:85 °C
最低工作温度:-40 °C封装主体材料:UNSPECIFIED
封装代码:HQCCN封装等效代码:LCC28,.16SQ,16
封装形状:SQUARE封装形式:CHIP CARRIER, HEAT SINK/SLUG
峰值回流温度(摄氏度):NOT SPECIFIED电源:5 V
认证状态:Not Qualified座面最大高度:0.9 mm
子类别:Display Drivers最大供电电压:5.5 V
最小供电电压:4.2 V标称供电电压:5 V
表面贴装:YES温度等级:INDUSTRIAL
端子面层:Matte Tin (Sn)端子形式:NO LEAD
端子节距:0.4 mm端子位置:QUAD
处于峰值回流温度下的最长时间:NOT SPECIFIED宽度:4 mm
最小 fmax:2.2 MHzBase Number Matches:1

A8500EECTR-T 数据手册

 浏览型号A8500EECTR-T的Datasheet PDF文件第2页浏览型号A8500EECTR-T的Datasheet PDF文件第3页浏览型号A8500EECTR-T的Datasheet PDF文件第4页浏览型号A8500EECTR-T的Datasheet PDF文件第5页浏览型号A8500EECTR-T的Datasheet PDF文件第6页浏览型号A8500EECTR-T的Datasheet PDF文件第7页 
A8500  
Flexible WLED/RGB Backlight Driver for Medium Size LCDs  
Features and Benefits  
Description  
▪ꢀ ActiveꢀcurrentꢀsharingꢀbetweenꢀLEDꢀstringsꢀforꢀ±1.5%ꢀ  
typicalꢀcurrentꢀmatchingꢀandꢀ±1.2%ꢀtypicalꢀaccuracy  
▪ꢀ Driveꢀupꢀtoꢀ12ꢀseriesꢀ× 8 parallel = 96 LEDs  
(Vf = 3.2 V, If = 20 mA)  
TheA8500 is a multi-outputWLED driver for medium display  
backlighting.TheA8500integratesaboostconverterandeight  
current-sinks to provide a flexible WLED/RGB backlight  
driver. The boost converter can provide output voltage up to  
47 V. The flexible channel selection control and high voltage  
capability allow a wide range of LED backlight applications.  
The A8500 can support any application requiring 4 to 96  
WLEDs. The boost converter is a constant frequency current-  
mode converter.  
▪ꢀ Flexibleꢀdimming,ꢀusingꢀalternativeꢀmethods:  
▫ꢀ LED duty cycle control (PWM pin)  
▫ꢀ DC current using serial programming (EN pin)  
▫ꢀ DC current using external PWM signal (APWM pin)  
▫ꢀ An external resistor  
▪ꢀ Boostꢀconverterꢀwithꢀintegratedꢀ50ꢀV,ꢀ2ꢀAꢀDMOS  
▪ꢀ LEDꢀsinksꢀratedꢀforꢀ30ꢀmA  
▪ꢀ 200ꢀkHzꢀtoꢀ2ꢀMHzꢀswitchingꢀfrequency  
▪ꢀ OpenꢀLEDꢀdisconnect  
Each LED channel can sink 30 mA, and channels can be  
paralleled for higher currents. Flexible dimming allows output  
channels to either run at an adjustable DC value or with  
externally controlled PWM duty cycles.  
▪ꢀ Boostꢀcurrentꢀlimit,ꢀthermalꢀshutdown,ꢀandꢀsoftꢀstart  
The A8500 is available in a 26 pin, 4 mm × 4 mm QFN/MLP  
▪ꢀ NoꢀaudibleꢀceramicꢀcapacitorꢀnoiseꢀduringꢀPWMꢀdimming package that is only 0.75 mm nominal in height. Applications  
▪ꢀ Adjustableꢀovervoltageꢀprotectionꢀ(OVP)  
▪ꢀ Noꢀpull-upꢀresistorsꢀrequiredꢀforꢀLEDꢀmodulesꢀthatꢀuseꢀ  
ESD capacitors  
include:  
▪ꢀ Thinꢀnotebookꢀdisplays  
▪ꢀ LCDꢀTV  
▪ꢀ RGBꢀbacklight  
▪ꢀ GPSꢀsystems  
▪ꢀ PortableꢀDVDꢀplayers  
Package: 26 pin QFN/MLP (suffix EC)  
Approximate Scale 1:1  
Typical Application  
EN pin dimming:  
serial pulse train input  
L1  
10 µH  
VBAT  
5 to 25 V  
VS  
D1  
5 V ±10%  
CIN  
0.1 µF/ 10 V  
CBAT  
1 µF/ 25 V  
VEN  
ROVP  
COUT  
VIN  
SW SW  
OVP  
AGND  
EN  
2.2 µF  
50 V  
IOUT  
PWM  
APWM  
SKIP  
PGND  
PWM pin dimming:  
digital PWM input  
A8500  
COMP  
VPWM  
VIN  
SEL3  
SEL2  
FSET  
CC  
RFSET  
RISET  
ISET  
IOUT  
SEL1  
LED2  
LED1  
APWM pin dimming:  
analog PWM input  
LED3 LED5 LED7 LGND  
LED8 LED6 LED4  
VAPWM  
IOUT  
Figure 1. LCD monitor backlight, driving 96 LEDs. LED Vf = 3.2 V, 20 mA per LED string. Overvoltage  
protection set to 45 V nominal (40.5 V minimum). Alternative dimming control pulse trains illustrated  
for EN, PWM, and APWM control. See also: Recommended Components table, page 14.  
8500-DS  

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