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A8512ELBTR-T

更新时间： 2024-02-12 18:49:13
品牌 Logo 应用领域
急速微 - ALLEGRO 显示驱动器显示器驱动程序和接口接口集成电路光电二极管
页数 文件大小 规格书
16页 483K
描述
LED Backlight Driver for Medium/Large Displays

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A8512ELBTR-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：TSSOP
包装说明：HTSSOP, TSSOP24,.25针数：24
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.82
其他特性：IT ALSO NEED 4.75 TO 5.5V BIAS SUPPLY接口集成电路类型：LED DISPLAY DRIVER
JESD-30 代码：R-PDSO-G24JESD-609代码：e3
长度：7.8 mm湿度敏感等级：2
复用显示功能：NO功能数量：1
区段数：36端子数量：24
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：HTSSOP
封装等效代码：TSSOP24,.25封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH峰值回流温度（摄氏度）：260
电源：12 V认证状态：Not Qualified
座面最大高度：1.2 mm子类别：Display Drivers
最大供电电压：24 V最小供电电压：8 V
标称供电电压：12 V电源电压1-最大：8 V
电源电压1-分钟：6.5 V表面贴装：YES
温度等级：INDUSTRIAL端子面层：Matte Tin (Sn)
端子形式：GULL WING端子节距：0.65 mm
端子位置：DUAL处于峰值回流温度下的最长时间：40
宽度：4.4 mmBase Number Matches：1

A8512ELBTR-T 数据手册

 浏览型号A8512ELBTR-T的Datasheet PDF文件第2页浏览型号A8512ELBTR-T的Datasheet PDF文件第3页浏览型号A8512ELBTR-T的Datasheet PDF文件第4页浏览型号A8512ELBTR-T的Datasheet PDF文件第5页浏览型号A8512ELBTR-T的Datasheet PDF文件第6页浏览型号A8512ELBTR-T的Datasheet PDF文件第7页 
A8512  
LED Backlight Driver for Medium/Large Displays  
Features and Benefits  
Description  
▪ Six individual current sinks capable of 80 mA each  
▪ Fixed frequency current mode control with integrated  
gate driver  
The A8512 is a multi-output WLED/RGB driver for medium  
size display backlighting. It integrates a boost controller to  
drive external MOSFET, and six internal current-sinks. The  
boostconverteroperatesinconstantfrequency(programmable)  
current mode control.  
▪ 300 kHz to 1 MHz adjustable switching frequency  
▪ Controlled startup using options of Enable, PWM signal,  
or battery voltage ramp  
▪ Parallel operation with one boost controller (master) and  
up to five slave controllers  
PWM dimming allows LED currents to be controlled in 500:1  
ratio. The LED sinks are capable of sinking up to 80 mAeach,  
and can be combined together to achieve even higher currents.  
MultipleA8512s can be connected in parallel, with one master  
controller controlling the boost stage, and up to five slave  
controllers, which act as LED sinks. This allows up to 36 LED  
strings to be powered by just one boost converter.  
▪ Active current sharing between LED strings for ±0.6%  
accuracy and matching  
▪ No audible MLCC noise during PWM dimming  
▪ Adjustable overvoltage protection (OVP)  
▪ Open or shorted LED string protection  
▪ Overtemperature, cycle-by-cycle current limit, and  
undervoltage protection  
▪ SOIC 24-pin package for easy single-side PCB  
manufacturing or QFN 28-contact package with exposed  
thermal pad for better thermal performance  
TheA8512operatesfromasinglesupplyof 8to24V.Itprovides  
protection against overvoltage, open or shorted LED string,  
and overtemperature.Adual level cycle-by-cycle current limit  
function provides soft start and protects against overloads.  
The device is provided in a 24-pin SOICWpackage (LB), with  
internally fused pins for enhanced thermal dissipation, and a  
28-contact 5 mm × 5 mm QFN package (ET), with an exposed  
thermal pad for enhanced thermal dissipation. Both packages  
are lead (Pb) free, with 100% matte tin leadframe plating.  
Packages:  
28-contact QFN  
with exposed thermal pad  
(ET Package)  
24-pin SOICW  
with internally fused pins  
(LB package)  
Not to scale  
Typical Application Circuit  
18 LEDs per string  
V
18 LEDs per string  
OUT  
V
L1  
D1  
BAT  
8 to 24 V  
Q1  
R
R
R
OVP2  
SC  
OVP1  
C1 C2  
P
C3 C4  
P
P
P
V
BAT  
DRIVER SENSE1 SENSE2 OVP  
VIN  
DRIVER SENSE1 SENSE2  
VIN  
OVP  
VBIAS  
VBIAS  
R1  
C5  
C7  
A8512  
(LB package)  
A8512  
(LB package)  
LED1  
LED2  
LED3  
LED4  
LED5  
LED6  
LED1  
Fault  
FAULT  
EN  
FAULT  
EN  
Enable  
LED2  
LED3  
LED4  
LED5  
LED6  
PWM  
PWM  
PWM  
Master  
Slave A  
COMP  
FSET  
COMP  
FSET  
R
R
FSET  
FSET  
R
R
ISET  
ISET  
ISET  
ISET  
VREG7V  
VREG7V  
Rz1  
Rz2  
C6  
C8  
Cz1  
Cz2  
AGND AGND LGND LGND PGND  
AGND AGND LGND LGND PGND  
P
P
Control Bus  
To additional slaves  
Figure 1. Typical application circuit for single IC operation, and (in dotted box) master/slave multiple IC operation.  
A8512L-DS  
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