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ADM8845

更新时间： 2024-01-08 18:46:53
品牌 Logo 应用领域
亚德诺 - ADI 驱动器泵
页数 文件大小 规格书
18页 338K
描述
Charge Pump Driver for LCD White LED Backlights

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ADM8845 技术参数

是否无铅：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：HVQCCN, LCC16,.12SQ,20针数：16
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.32
Is Samacsys：N接口集成电路类型：LED DISPLAY DRIVER
JESD-30 代码：S-XQCC-N16JESD-609代码：e3
长度：3 mm湿度敏感等级：3
复用显示功能：NO功能数量：1
区段数：6端子数量：16
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：HVQCCN
封装等效代码：LCC16,.12SQ,20封装形状：SQUARE
封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度（摄氏度）：260
电源：2.6/5.5 V认证状态：Not Qualified
座面最大高度：1 mm子类别：Display Drivers
最大供电电压：5.5 V最小供电电压：2.6 V
标称供电电压：3.3 V表面贴装：YES
技术：CMOS温度等级：INDUSTRIAL
端子面层：Matte Tin (Sn)端子形式：NO LEAD
端子节距：0.5 mm端子位置：QUAD
处于峰值回流温度下的最长时间：40宽度：3 mm
Base Number Matches：1

ADM8845 数据手册

 浏览型号ADM8845的Datasheet PDF文件第2页浏览型号ADM8845的Datasheet PDF文件第3页浏览型号ADM8845的Datasheet PDF文件第4页浏览型号ADM8845的Datasheet PDF文件第6页浏览型号ADM8845的Datasheet PDF文件第7页浏览型号ADM8845的Datasheet PDF文件第8页 
Preliminary Technical Data  
ADM8845  
PIN CONFIGURATION AND FUNCTION DESCRIPTION  
Table 3.  
Pin  
ADM8845  
Mnemonic Function  
Charge Pump Output. A 2.2µF capacitor to ground is required on this pin. Connect Vout to the anodes  
of all the LEDs.  
1
VOUT  
C2+  
ISET  
2
3
Flying Capacitor 2 Positive Connection  
Bias current set input. The current flowing through the RSET resistor ISET is gained up by 120 to give the  
LED curent. Connect a resistor RSET to GND to set the bias current as VSET/RSET. (Note: Vset = 1.18V)  
LED1 Cathode connection and Charge Pump Feedback. The current flowing in LED1 is 120 times the  
current flowing through RSET, ISET  
I
4
5
6
7
8
9
FB1  
FB2  
FB3  
FB4  
FB5  
FB6  
.
LED2 Cathode connection and Charge Pump Feedback. The current flowing in LED2 is 120 times the  
current flowing through RSET, ISET. When using fewer than six LEDs this pin can be left unconnected.  
LED3 Cathode connection and Charge Pump Feedback. The current flowing in LED3 is 120 times the  
current flowing through RSET, ISET. When using fewer than six LEDs this pin can be left unconnected.  
LED4 Cathode connection and Charge Pump Feedback. The current flowing in LED4 is 120 times the  
current flowing through RSET, ISET. When using fewer than six LEDs this pin can be left unconnected.  
LED5 Cathode connection and Charge Pump Feedback. The current flowing in LED5 is 120 times the  
current flowing through RSET, ISET. When using fewer than six LEDs this pin can be left unconnected.  
LED6 Cathode connection and Charge Pump Feedback. The current flowing in LED6 is 120 times the  
current flowing through RSET, ISET. When using fewer than six LEDs this pin can be left unconnected.  
10  
11  
G N D  
C2−  
Device Ground Pin.  
Flying Capacitor 2 Negative Connection.  
Digital Input. 3 V CMOS Logic. Used with CTRL1 to control the shutdown operation of the main and sub  
LEDs.  
12  
CTRL2  
Digital Input. 3 V CMOS Logic. Used with CTRL2 to control the shutdown operation of the main and sub  
LEDs.  
13  
14  
15  
CTRL1  
C1−  
Flying Capacitor 1 Negative Connection.  
Positive Supply Voltage Input. Connect this pin to a 2.6 V to 5.5 V supply with a 4.7µF decoupling  
capacitor.  
Vcc  
16  
-
C1+  
EP  
Flying Capacitor 1 Positive Connection.  
Expose Paddle. Connect the exposed paddle to GND.  
16  
15  
14  
13  
1
2
VOUT  
C2+  
12  
CTRL2  
C2-  
ADM8845  
TOP VIEW  
(NOT TO SCALE)  
11  
10  
9
ISET  
FB1  
3
4
GND  
FB6  
5
6
7
8
Figure 3. ADM8845 Pin Configuration  
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the  
human body and test equipment and can discharge without detection. Although this product features  
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy  
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance  
degradation or loss of functionality.  
Rev. PrJ 06/04| Page 5 of 18  
12345678...18

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