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ADM8832ACP-REEL7

更新时间： 2024-01-26 18:32:47
品牌 Logo 应用领域
亚德诺 - ADI 稳压器开关式稳压器或控制器电源电路开关式控制器泵
页数 文件大小 规格书
12页 198K
描述
Charge Pump Regulator for Color TFT Panel

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ADM8832ACP-REEL7 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Active零件包装代码：QFN
包装说明：HVQCCN,针数：20
Reach Compliance Code：unknown风险等级：5.22
Is Samacsys：N模拟集成电路 - 其他类型：SWITCHED CAPACITOR REGULATOR
最大输入电压：3.6 V最小输入电压：2.6 V
标称输入电压：3 VJESD-30 代码：S-XQCC-N20
JESD-609代码：e0长度：4 mm
湿度敏感等级：3功能数量：1
端子数量：20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封装形状：SQUARE
封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度（摄氏度）：240
认证状态：COMMERCIAL座面最大高度：0.9 mm
表面贴装：YES切换器配置：TRIPLER
最大切换频率：140 kHz技术：CMOS
温度等级：INDUSTRIAL端子面层：TIN LEAD
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：30
宽度：4 mmBase Number Matches：1

ADM8832ACP-REEL7 数据手册

 浏览型号ADM8832ACP-REEL7的Datasheet PDF文件第2页浏览型号ADM8832ACP-REEL7的Datasheet PDF文件第3页浏览型号ADM8832ACP-REEL7的Datasheet PDF文件第4页浏览型号ADM8832ACP-REEL7的Datasheet PDF文件第5页浏览型号ADM8832ACP-REEL7的Datasheet PDF文件第6页浏览型号ADM8832ACP-REEL7的Datasheet PDF文件第7页 
Charge Pump Regulator  
for Color TFT Panel  
ADM8832  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
3 output voltages (+5.1 V, +15.3 V, −10.2 V) from one 3 V  
input supply  
C5  
2.2µF  
V
CC  
Power efficiency optimized for use with TFT in mobile  
phones  
Low quiescent current  
Low shutdown current (<1 µA)  
Fast transient response  
Shutdown function  
C1+  
ADM8832  
VOLTAGE  
DOUBLER  
C1  
2.2µF  
C1–  
VOUT  
LDO IN  
OSCILLATOR  
CLKIN  
C6  
2.2µF  
LDO  
VOLTAGE  
REGULATOR  
SCAN/  
BLANK  
+5VOUT  
+5VIN  
CONTROL  
LOGIC  
Power saving during blanking period  
Option to use external ldo  
+5.1V  
C7  
2.2µF  
LDO_ON/  
OFF  
C2+  
DOUBLE  
TRIPLE  
C2  
1µF  
C2–  
C3+  
C3–  
APPLICATIONS  
Handheld instruments  
TFT LCD panels  
C3  
1µF  
TIMING  
GENERATOR  
+15VOUT  
VOLTAGE  
TRIPLER  
+15.3V  
C8  
1µF  
C4+  
C4  
C4–  
Cellular phones  
VOLTAGE  
INVERTER  
1µF  
SHUTDOWN  
CONTROL  
DISCHARGE  
SHDN  
–10VOUT  
–10.2V  
C9  
1µF  
GND  
Figure 1.  
GENERAL DESCRIPTION  
mode where the current is highest. During blanking periods, the  
ADM8832 switches to an external, lower frequency clock. This  
allows the user to vary the frequency and maximize power  
efficiency during blanking periods. The tolerances on the output  
voltages are seamlessly maintained when switching from scan-  
ning mode to blanking mode or vice versa.  
The ADM8832 is a charge pump regulator used for color thin  
film transistor (TFT) liquid crystal displays (LCD). Using charge  
pump technology, the device can be used to generate three  
output voltages (+5.1 V 2ꢀ, +15.3 V, −10.2 V) from a single  
3 V input supply. These outputs are then used to provide  
supplies for the LCD controller (+5.1 V) and the gate drives for  
the transistors in the panel (+15.3 V and −10.2 V). Only a few  
external capacitors are needed for the charge pumps. An  
efficient low dropout voltage regulator also ensures that the  
power efficiency is high and provides a low ripple 5.1 V output.  
This LDO can be shut down and an external LDO used to  
regulate the 5 V doubler output and drive the input to the  
charge pump section, which generates the +15.3 V and −10.2 V  
outputs if so required by the user.  
The ADM8832 power saving features include low power  
shutdown and reduced quiescent current consumption during  
the blanking periods. The 5.1 V output consumes the most  
power, so power efficiency is also maximized on this output  
with an oscillator enabling scheme (Green Idle™). This  
effectively senses the load current that is flowing and turns on  
the charge pump only when charge needs to be delivered to the  
5 V pump doubler output.  
The ADM8832 has an internal 100 kHz oscillator for use in  
scanning mode, but the part must be clocked by an external  
clock source in blanking (low current) mode. The internal  
oscillator is used to clock the charge pumps during scanning  
The ADM8832 is fabricated using CMOS technology for minimal  
power consumption. The part is packaged in a 20-lead LFCSP  
(lead frame chip scale package).  
Rev. A  
Information furnished by Analog Devices is believed to be accurate and reliable.  
However, no responsibility is assumed by Analog Devices for its use, nor for any  
infringements of patents or other rights of third parties that may result from its use.  
Specifications subject to change without notice. No license is granted by implication  
or otherwise under any patent or patent rights of Analog Devices. Trademarks and  
registered trademarks are the property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.326.8703  
www.analog.com  
© 2004 Analog Devices, Inc. All rights reserved.  
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