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A8516

更新时间： 2024-01-12 20:59:30
品牌 Logo 应用领域
急速微 - ALLEGRO 驱动器显示器电视
页数 文件大小 规格书
17页 554K
描述
The A8516 is a multi-output WLED/RGB driver for backlighting LCD monitors and televisions.

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A8516 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Active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：5.71
接口集成电路类型：LED DISPLAY DRIVERJESD-30 代码：R-PDSO-G24
JESD-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：6
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）：NOT SPECIFIED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
表面贴装：YES温度等级：INDUSTRIAL
端子面层：NOT SPECIFIED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：NOT SPECIFIED宽度：4.4 mm
Base Number Matches：1

A8516 数据手册

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A8516  
LED Backlight Driver for LCD Monitors and Televisions  
Features and Benefits  
Description  
▪ Six integrated high current sinks  
The A8516 is a multi-output WLED/RGB driver for  
backlightingLCDmonitorsandtelevisions.Itintegratesaboost  
controller to drive external MOSFET, and six internal current-  
sinks. The boost converter operates in constant frequency  
(programmable) current mode control.  
▪ Fixed frequency current mode control with integrated gate driver  
▪ 300 kHz to 1 MHz adjustable Boost switching frequency  
▪ Controlled startup using options of Enable, PWM signal, or  
battery voltage ramp  
▪ 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 TSSOP 24-pin package with exposed thermal pad for better  
thermal performance  
The LED sink current is set by an external R_ISET resistor  
(see chart below). More than one LED sinks can be combined  
together to achieve even higher current per LED string.  
TheA8516operatesfromasinglesupplyof 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  
24-pin TSSOP package (LP), with an exposed thermal pad  
for enhanced thermal dissipation. All packages are lead (Pb)  
free, with 100% matte tin leadframe plating.  
Packages:  
24-pin SOICW  
with internally fused pins  
(LB package)  
Not to scale  
24-pin TSSOP  
with exposed thermal pad  
(LP package)  
Typical Application Circuit  
V
18 LEDs per string  
OUT  
V
L1  
D1  
BAT  
Q1  
8 to 24 V  
R
R
SC  
OVP  
P
C1 C2  
P
C3 C4  
P
LED Current versus ISET Resistor Value  
VREF = 1.24 V, Gain = 640  
DRIVER SENSE1 SENSE2 OVP  
VIN  
VBIAS  
130  
120  
110  
100  
90  
R1  
C5  
A8516  
LED1  
LED2  
LED3  
LED4  
LED5  
LED6  
FAULT  
EN  
80  
PWM  
70  
60  
COMP  
FSET  
R2  
R
FSET  
50  
40  
R
ISET  
R3  
ISET  
30  
VREG7V  
Rz1  
20  
6
8
10 12 14 16 18 20 22 24 26 28 30  
C6  
RISET (kΩ)  
Cz1  
AGND AGND LGND LGND PGND  
P
Figure 1. Typical application circuit; VIN pin tied to VBAT  
.
R2, R3 optional (A8516 has  
internal pull-down resistors)  
A8516, Rev. 1  
1234567...17

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