參數(shù)資料
型號(hào): ADD8733ACPZ-REEL
廠商: ANALOG DEVICES INC
元件分類: 模擬信號(hào)調(diào)理
英文描述: Integrated TFT Panel Power Supply with Gate Modulation and VCOM
中文描述: SPECIALTY ANALOG CIRCUIT, QCC48
封裝: 7 X 7 MM, ROHS COMPLIANT, MO-220VKKD-2, LFCSP-48
文件頁(yè)數(shù): 1/16頁(yè)
文件大?。?/td> 182K
代理商: ADD8733ACPZ-REEL
Integrated TFT Panel Power Supply
with Gate Modulation and VCOM
Preliminary Technical Data
ADD8733
FEATURES
Rev. PrA
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: 781.461.3113
2007 Analog Devices, Inc. All rights reserved.
www.analog.com
Step-up switching regulator with 3 A switch current limit
8 V to 16.5 V input voltage range
Adjustable output voltage up to 20 V
1.2 A series switch for power sequencing
Overvoltage protection (OVP)
Step-down switching regulator with 3 A switch current limit
8 V to 16.5 V input voltage range
Adjustable output voltage down to 2.5 V
Gate pulse modulator circuitry
Independently adjustable delay and falling slope
Positive charge-pump regulator for VGH
Negative charge-pump regulator for VGL
Two VCOM
amplifiers
General
Power supply sequencing
Thermal fault protection
650 kHz or 1.2 MHz PWM frequency
Soft start
Undervoltage lockout (UVLO)
48-lead RoHS compliant LFCSP
APPLICATIONS
TFT LCD panels for TVs and monitors
BLOCK DIAGRAM
STEP-DOWN SWITCHING REGULATOR
TWO VCOM AMPLIFIERS
CONTROL
ADD8733
STEP-UP SWITCHING REGULATOR
AND POWER SEQUENCING
GATE PULSE
MODULATION
UNDERVOLTAGE
LOCKOUT AND
THERMAL PROTECTION
VGL
REGULATOR
VGH
REGULATOR
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
X
X
X
X
X
X
X
X
0
Figure 1.
GENERAL DESCRIPTION
The ADD8733 is a 4-channel regulator with two VCOM
amplifiers and gate pulse modulation (GPM) that provides
all the necessary voltages for thin film transistor (TFT) liquid
crystal displays (LCD). Included is a step-up regulator, a step-
down regulator for digital logic, two VCOM amplifiers, two
charge-pump regulators for VGH and VGL, and an integrated
gate pulse modulator.
By offering a complete power integration solution optimized for
TFT LCD TVs and monitors, the ADD8733 helps to lower cost,
simplify board design, and increase performance over existing
solutions.
The ADD8733 is offered in a 48-lead RoHS compliant LFCSP
and is specified over the industrial temperature range of 40°C
to +85°C.
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