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參數資料
| 型號： | ADM8839ACP |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 穩壓器 |
| 英文描述： | Charge Pump Regulator for Color TFT Panels |
| 中文描述： | SWITCHED CAPACITOR REGULATOR, 140 kHz SWITCHING FREQ-MAX, QCC20 |
| 封裝： | 4 X 4 MM, MO-220VGGD-1, LFCSP-20 |
| 文件頁數： | 1/8頁 |
| 文件大?。?/td> | 233K |
| 代理商： | ADM8839ACP |
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. 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 companies.
Tel: 781/329-4700 Fax: 781/326-8703
www.analog.comADM8839
Charge Pump Regulator
for Color TFT Panels
FUNCTIONAL BLOCK DIAGRAM
OSCILLATOR
CONTROL
LOGIC
TIMING
GENERATOR
SHUTDOWN
CONTROL
DISCHARGE
VOLTAGE
INVERTER
VOLTAGE
TRIPLER
TRIPLE
LDO
VOLTAGE
REGULATOR
VOLTAGE
DOUBLER
C1+
C1–
VOUT
LDO_IN
+5VOUT
+5VIN
C2+
C2–
C3+
C3–
+15VOUT
C4+
C4–
–15VOUT
–15V
+15V
+5V
GND
SHDN
LDO_ON/
OFF
V
CC
DOUBLE
C5, 2.2 F
C1, 2.2 F
C6, 2.2 F
C7, 2.2 F
C8, 0.22 F
C9, 0.22 F
C2, 0.22 F
C3, 0.22 F
C4, 0.22 F
ADM8839
GENERAL DESCRIPTION
The ADM8839 is a charge pump regulator used for color thin film
transistor (TFT) liquid crystal displays (LCDs). Using charge
pump technology, the device can be used to generate three
voltages (+5 V
±
2%, +15 V, –15 V) from a single 3 V supply.
These voltages are then used to provide supplies for the LCD
controller (5 V) and the gate drives for the transistors in the
panel (+15 V and –15 V). Only a few external capacitors are
needed for the charge pumps. An efficient low dropout (LDO)
voltage regulator ensures that the power efficiency is high and
provides a low ripple 5 V output. This LDO can be shut down
and an external LDO can be used to regulate the 5 V doubler
output and drive the input to the charge pump section that
generates the +15 V and –15 V outputs, if required by the user.
FEATURES
3 Voltages (+5 V, +15 V, –15 V) from
a Single 3 V Supply
Power Efficiency Optimized for Use
with TFT in Mobile Phones
Low Quiescent Current
Low Shutdown Current (<5 A)
Shutdown Function
Option to Use External LDO
APPLICATIONS
Hand-held Instruments
TFT LCD Panels
Cellular Phones
The ADM8839 has a power save shutdown feature. The 5 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 ADM8839 is fabricated using CMOS technology for minimal
power consumption. The part is packaged in a 20-lead LFCSP
(lead frame chip scale package).
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| ADM8845 | Charge Pump Driver for LCD White LED Backlights |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| 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 類別:集成電路 (IC) >> PMIC - 穩壓器 - 專用型 系列:- 標準包裝:2,000 系列:- 應用:控制器，DSP 輸入電壓:4.5 V ~ 25 V 輸出數:2 輸出電壓:最低可調至 1.2V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:30-TFSOP（0.173"，4.40mm 寬） 供應商設備封裝:30-TSSOP 包裝:帶卷 (TR) |
| ADM8839ACPZ-REEL | 功能描述:IC CHARGE PUMP REG TFT 20LFCSP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - 專用型 系列:- 標準包裝:43 系列:- 應用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數:1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應商設備封裝:48-QFN（7x7） 包裝:管件 |
| ADM8839ACPZ-REEL7 | 功能描述:IC CHARGE PUMP REG TFT 20LFCSP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - 專用型 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,000 系列:- 應用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數:10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應商設備封裝:42-WLP 包裝:帶卷 (TR) |
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