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參數(shù)資料
| 型號： | ADM8840ACP |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 20-17 (6 Contacts) Socket Insert; For Use With:Amphenol MIL-C-5015 97 Series Circular Connectors; No. of Contacts:6 |
| 中文描述： | SWITCHED CAPACITOR REGULATOR, CQCC32 |
| 封裝： | 5 X 5 MM, LFCSP-32 |
| 文件頁數(shù)： | 1/10頁 |
| 文件大?。?/td> | 166K |
| 代理商： | ADM8840ACP |
ADM8840
REV. PrG
2
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3
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, PO. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
Analog Devices, Inc., 200
3
Charge Pump Regulator & COM Driver
for Color TFT Panel
Preliminary Technical Data
PRELIMINARY TECHNICAL DATA
a
FEATURES
Programmable COM Driver to prevent Screen-Burn
3 Voltages (5.0V,15.0V,-15.0V) from one 3V Supply
Power Efficiency optimised for use with TFT in mobile
phones
Low Quiescent Current
Low Shutdown Current (<5uA)
Shutdown Function
APPLICATIONS
Handheld Instruments
TFT LCD Panels
Cellular Phones
GENERAL DESCRIPTION
The ADM8840 combines a charge pump regulator and a
Common Line (COM) driver in a single chip solution for use
in TFT LCD’s. The device provides an LCD controller and
grayscale DAC supply voltage of 5.0V (±2%), 2 gate drive
voltages of +15V and -15V and a COM driver voltage. This
COM Driver voltage alternates the polarity of the Common
line voltage every line (or every frame) on the display in order
to prevent screen-burn occuring over time. The ADM8840
is powered by a single 3.0V supply.
The ADM8840 has an internal 100KHz oscillator for driving
the charge pumps.
The COM Driver section of the ADM8840 can be used to
generate the alternate frame or line inversion of the COM
line of the LCD panel. The ADM8840 receives the COM
clock from the controller with a frequency up to 10kHz and
allows programmable conditioning of its amplitude and
centre voltage through the use of on-board DAC’s. This
allows programmable elimination of display flicker caused
by the COM inversion.
The COM_OUT amplitude can be programmed from 4.0V
to 7.0V in steps of 28mV. The COM_OUT centre voltage
can be programmed to 0.9V to 2.8V in steps of 14mV.
TM
Green Idle is a registered trademark of Analog Devices Inc.
The ADM8840 provides power up sequencing of the -15V
and +15V gate drive outputs, ensuring the -15V starts to
power up before the +15V.
The ADM8840 has a number of power save features, includ-
ing low power Shutdown. The 5.0V output consumes the
most power, so Power Efficiency is also maximised on this
output with an oscillator enabling scheme (Green Idle
TM
).
The ADM8840 is fabricated using CMOS technology for
minimal power consumption. The part is packaged in a 32-
pin LFCSP package.
FUNCTIONAL BLOCK DIAGRAM
SERIAL
INTERFACE
VREF
DAC 1
DAC 2
8
8
CLK
DATA
CS /
LDAC
LEVEL
TRANSLATOR
POWER
+
-
-
+
COM_IN
4.7 F
4.7 F
C
PANEL
22nF
5.5k
4.7 F
OSCILLATOR
CONTROL
LOGIC
GETIMING
CONTROL
DISCHARGE
VOLTAGE
C1+
C1-
SHDN
VCC
VOLDO
REGULATOR
5VOUT
2.2 F
C7
DOUBLE
TRIPLE
TRIPLER
IVOLTAGE
C2+
C2-
C3+
C3-
VOUT
VADDER
C5+
C5-
+15V
C4+
C4-
-15V
ADM8840
0.22 F
3.3 F
3.3 F
3.3 F
0.22 F
0.22 F
0.22 F
0.22 F
DAC1_SD
DAC1_IN
IDAC 1
INT/EXT
DAC 2
DAC2_SD
DAC2_IN
C4
C2
C3
C9
C8
ADD_OUT
TRANS_OUT
COM_OUT_AC
COM_OUT
GND
C5
C10
C11
C12
C13
4.7 F
C6
C1
5VIN
+5V
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| ADM8845ACPZ-REEL7 | 20-21 (9 Contact) Pin Insert; For Use With:Amphenol MIL-C-5015 97 Series Circular Connectors; No. of Contacts:9; Gender:Male; Operating Voltage:700V |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADM8840ACP-REEL7 | 制造商:Analog Devices 功能描述: |
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| ADM8843ACPZ1-R7 | 制造商:Analog Devices 功能描述: |
| ADM8843ACPZ-REEL7 | 功能描述:IC LED DRVR WHITE BCKLGT 16LFCSP RoHS:是 類別:集成電路 (IC) >> PMIC - LED 驅(qū)動(dòng)器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 恒定電流:- 恒定電壓:- 拓?fù)?PWM，切換式電容器（充電泵） 輸出數(shù):1 內(nèi)部驅(qū)動(dòng)器:是 類型 - 主要:背光 類型 - 次要:白色 LED 頻率:642kHz 電源電壓:2.7 V ~ 5.5 V 輸出電壓:5V 安裝類型:表面貼裝 封裝/外殼:10-VFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-VSON 包裝:剪切帶 (CT) 工作溫度:-30°C ~ 85°C 產(chǎn)品目錄頁面:1371 (CN2011-ZH PDF) 其它名稱:BD1603NUV-E2CT |
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