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| 型号： | ADM8832EB-EVALZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION ADM8832 REG |
| 标准包装： | 1 |
| 主要目的： | 特殊用途 DC/DC，LCD 电源 |
| 输出及类型： | 3，非隔离 |
| 输出电压： | 5.1V，15.3V，-10.2V |
| 电流 - 输出： | 5mA，1µA，1µA |
| 输入电压： | 2.6 ~ 3.6V |
| 稳压器拓扑结构： | 升压 |
| 频率 - 开关： | 100kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | ADM8832 |
| 相关产品： | ADM8832ACPZ-ND - IC CHARGE PUMP REG TFT 20LFCSP ADM8832ACPZ-REEL7-ND - IC CHARGE PUMP REG TFT 20LFCSP ADM8832ACPZ-REEL-ND - IC CHARGE PUMP REG TFT 20LFCSP |
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
Power efficiency optimized for use with TFT in mobile
phones
Low quiescent current
V CC
ADM8832
C5
2.2 μ F
VOLTAGE
DOUBLER
C1+
C1–
VOUT
C1
2.2 μ F
Low shutdown current (<1 μA)
Fast transient response
Shutdown function
Power saving during blanking period
Option to use external ldo
APPLICATIONS
Handheld instruments
TFT LCD panels
CLKIN
SCAN/
BLANK
LDO_ON/
OFF
OSCILLATOR
CONTROL
LOGIC
TIMING
GENERATOR
VOLTAGE
LDO
VOLTAGE
REGULATOR
DOUBLE
TRIPLE
LDO IN
+5VOUT
+5VIN
C2+
C2
C2– 1 μ F
C3+
C3
1 μ F
C3–
+15VOUT
C6
2.2 μ F
+5.1V
C7
2.2 μ F
+15.3V
Cellular phones
SHDN
TRIPLER
VOLTAGE
SHUTDOWN DISCHARGE INVERTER
CONTROL
C4+
C4–
C4
1 μ F
C8
1 μ F
GENERAL DESCRIPTION
GND
Figure 1.
–10VOUT
–10.2V
C9
1 μ F
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 ±2%, +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 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
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
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 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 is fabricated using CMOS technology for minimal
power consumption. The part is packaged in a 20-lead LFCSP
(lead frame chip scale package).
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
registered trademarks are the property of their respective owners.
Fax: 781.326.8703
? 2004 Analog Devices, Inc. All rights reserved.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADM8839 | 制造商:AD 制造商全称:Analog Devices 功能描述:Charge Pump Regulator for Color TFT Panels |
| ADM8839ACP | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
| ADM8839ACP-REEL | 制造商:Rochester Electronics LLC 功能描述:CHARGE PUMP REGULATOR TFT DISPLAYS I.C. - Tape and Reel 制造商:Analog Devices 功能描述: |
| ADM8839ACP-REEL7 | 制造商:Analog Devices 功能描述:Charge Pump INV/STPUP -15V/5V/15V 5mA/0.001mA/-0.001mA 20-Pin LFCSP EP T/R 制造商:Rochester Electronics LLC 功能描述:CHARGE PUMP REGULATOR TFT DISPLAYS I.C. - Tape and Reel |
| ADM8839ACPZ | 功能描述:IC CHARGE PUMP REG TFT 20LFCSP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:2,000 系列:- 应用:控制器，DSP 输入电压:4.5 V ~ 25 V 输出数:2 输出电压:最低可调至 1.2V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:30-TFSOP（0.173"，4.40mm 宽） 供应商设备封装:30-TSSOP 包装:带卷 (TR) |
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