参数资料
| 型号： | LT1947EMSE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC REG TFT-LCD ADJ 10-MSOP |
| 标准包装： | 2,500 |
| 应用： | 转换器，TFT，LCD |
| 输入电压： | 2.7 V ~ 8 V |
| 输出数： | 3 |
| 输出电压： | 最高可调至 30V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 供应商设备封装： | 10-MSOP 裸露焊盘 |
| 包装： | 带卷 (TR) |
LT1947
Adjustable Output TFT-LCD
Triple Switching Regulator
FEATURES
DESCRIPTIO
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Complete Solution Under 1.2mm
Develops Three Outputs from a 3.3V or 5V Supply
Externally Programmable V ON Delay
Fixed Frequency Low Noise Outputs
All Ceramic Capacitors
3MHz Switching Frequency
Fast Transient Response
Few External Components Required
2.7V to 8V Input Range
Adjustable AV DD and V ON Voltages
Tiny 10-Lead MSOP and Thermally Enhanced
The LT ? 1947 is a highly integrated multiple output DC/DC
converter designed for use in TFT-LCD panels. The device
contains two independent switching regulators. The main
regulator has an adjustable output voltage with an internal
1.1A switch that can generate a boosted voltage as high as
30V. The second regulator’s output is also adjustable up
to 30V and can deliver 10mA for positive bias. A simple
level-shift charge pump off the main switch node gener-
ates the negative bias voltage. An external capacitor sets
the delay time from AV DD ’s final value to the rising edge at
the V ON pin. The 3MHz switching frequency allows the use
10-Lead MSOP Packages
APPLICATIO S
of tiny low profile chip inductors and capacitors through-
out, providing a low noise, low cost total solution with all
components under 1.2mm in height. The device operates
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TFT-LCD Notebook Display Panels
TFT-LCD Desktop Monitor Display Panels
Digital Cameras
Handheld Computers
from an input range of 2.7V to 8V and is available in
10-lead MSOP and thermally enhanced 10-lead MSOP
packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
D3
D4
V OFF
–8V
V IN
L1
3.3 μ H
C6
0.68 μ F
10mA
C4
0.68 μ F
CERAMIC
AV DD
8V
C1
2.2 μ F
CERAMIC
L2
4.7 μ H
D2
R3
V IN
SW2
V O2
LT1947
SW1
FB1
D1
R1
53.6k
R2
10k
200mA
C2
3.3 μ F
CERAMIC
× 2
V SHDN
5V/DIV
V ON
20V/DIV
Start-Up Waveforms
C3
220nF
182k
R4
10k
FB2
SHDN C T
V ON
GND
V ON
24V
10mA
AV DD
10V/DIV
SHUTDOWN
C5
10nF
V OFF
10V/DIV
C1: TAIYO YUDEN LMK316BJ225MD
C2: TAIYO YUDEN LMK325BJ335MD × 2
C3: AVX 0.22 μ F 25V X7R
D1: MBRM120LT3
D2: CMDSH-3
D3, D4: BAT54S DUAL DIODE
1947 F01
2ms/DIV
1947 TA01.tif
C4, C6: TAIYO YUDEN LMK107BJ684MA
L1: SUMIDA CLQ4D103R3
L2: TAIYO YUDEN LB2012B4R7M
Figure 1. 3.3V Powered TFT-LCD Bias Generator
1947fa
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1948 | 制造商:LINEAR 制造商全称:LINEAR 功能描述:DC/DC Converter for TFT-LCD Panels |
| LT1948EMS8 | 制造商:LINER 制造商全称:Linear Technology 功能描述:DC/DC Converter for TFT-LCD Panels |
| LT1949 | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.4A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect |
| LT1949-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.4A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect |
| LT1949-1EMS8 | 功能描述:IC REG BOOST ADJ 1A 8MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:20 系列:SIMPLE SWITCHER® 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:12V 输入电压:4 V ~ 60 V PWM 型:电压模式 频率 - 开关:52kHz 电流 - 输出:1A 同步整流器:无 工作温度:-40°C ~ 125°C 安装类型:通孔 封装/外壳:16-DIP（0.300"，7.62mm） 包装:管件 供应商设备封装:16-DIP 其它名称:*LM2575HVN-12LM2575HVN-12 |
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