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LTC3524EUF PDF预览

LTC3524EUF

更新时间： 2024-01-07 14:31:06
品牌 Logo 应用领域
凌特 - Linear 驱动器稳压器开关式稳压器或控制器电源电路开关式控制器
页数 文件大小 规格书
16页 259K
描述
Adjustable TFT Bias Supply with WLED Driver

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中文翻译

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LTC3524EUF 技术参数

是否Rohs认证：符合生命周期：Transferred
零件包装代码：QFN包装说明：HVQCCN, LCC24,.16SQ,20
针数：24Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.22Is Samacsys：N
模拟集成电路 - 其他类型：DUAL SWITCHING CONTROLLER控制模式：CURRENT-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：6 V
最小输入电压：2.5 V标称输入电压：3.6 V
JESD-30 代码：S-PQCC-N24JESD-609代码：e3
长度：4 mm湿度敏感等级：1
功能数量：1端子数量：24
最高工作温度：85 °C最低工作温度：
封装主体材料：PLASTIC/EPOXY封装代码：HVQCCN
封装等效代码：LCC24,.16SQ,20封装形状：SQUARE
封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度（摄氏度）：260
电源：3.6 V认证状态：Not Qualified
座面最大高度：0.8 mm子类别：Power Management Circuits
标称供电电压 (Vsup)：3.6 V表面贴装：YES
切换器配置：BOOST最大切换频率：2000 kHz
技术：CMOS温度等级：OTHER
端子面层：Matte Tin (Sn)端子形式：NO LEAD
端子节距：0.5 mm端子位置：QUAD
处于峰值回流温度下的最长时间：30宽度：4 mm
Base Number Matches：1

LTC3524EUF 数据手册

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LTC3524  
Adjustable TFT Bias Supply  
with WLED Driver  
FEATURES  
DESCRIPTION  
The LTC®3524 is an integrated BIAS and white LED power  
convertersolutionforsmall/medium-sizedpolysiliconthin  
film transistor (TFT) liquid crystal (LCD) display panels.  
The device operates from a single Lithium-Ion/polymer  
battery or any voltage source between 2.5V and 6V.  
■
Generates Three Adjustable, Low Noise Rails for  
Small/Medium TFT Displays  
■
Drives Up to Ten White LEDs  
■
LED Dimming and Open-Circuit Protection  
■
Controlled Power-Up/Power-Down Sequencing  
■
1.5MHz Fixed Frequency, Low Noise Operation  
A 1.5MHz synchronous boost converter generates a pro-  
grammable low noise, high efficiency 25mA TFT supply  
of up to 6.0V. Regulated, low ripple charge pumps are  
used to generate up to +20V and –20V at 2mA. Output  
sequencing is internally controlled to insure proper  
initialization and rapid discharge of the LCD panel in  
shutdown.  
■
V Range 2.5V to 6V, V  
IN  
Range 3V to 6V  
OUT  
■
■
■
■
■
■
TFT Supply Efficiency Up to 90%  
LED Supply Efficiency Up to 78%  
Two Independantly Enabled LED Strings  
200 to 1 True Color PWMTM Dimming  
Tiny External Solution  
24-Lead QFN Package (4mm × 4mm × 0.75mm)  
A second 1.5MHz boost converter powers one or two LED  
strings with up to five series elements each. LED current  
anddisplaybrightnesscanbecontrolledoverawiderange  
using analog or digital means up to 25mA.  
APPLICATIONS  
■
PDAs, Palmtop Computers  
■
Digital Still and Video Cameras  
The LTC3524 is offered in the 4mm × 4mm 24-pin QFN  
package, minimizing the total solution footprint.  
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
True Color PWM is a registered trademarks of Linear Technology Corporation. All other  
trademarks are the property of their respective owners.  
■
Handheld GPS  
Portable Instrument Displays  
■
■
Portable Media Players  
TYPICAL APPLICATION  
LCD Bias and LED Efficiency  
VIN = 3.6V, VOUT = 5V, 8 LEDs  
+5V, –7.5V, +12.5V, 8 LED Power Supply  
100  
90  
80  
70  
60  
V
IN  
= 3.6V  
+
–
10μH  
3.3μH  
2.2μF  
Li-Ion  
10μF  
SW1  
V
SW2  
VLED  
IN  
LCD  
LED  
+5V  
25mA  
V
OUT  
LED2  
10μF  
1M  
324k  
220k  
FBVO  
VNIN  
V2x  
LED1  
+10V  
PROG  
100k for 20mA  
ELED2  
ELED1  
ELCD  
+
LTC3524  
C2  
0.47μF  
0.1μF  
–
V
IN  
C2  
470k  
1M  
+12.5V  
2mA  
VH  
FBN  
V
OUT  
15  
20  
5
25  
10  
0.47μF  
2M  
V
OR LED STRING CURRENT (mA)  
–7.5V  
2mA  
OUT  
FBH  
VN  
3524 TA01b  
+
–
+
CH  
CH GND CN  
0.47μF  
0.1μF  
0.1μF  
3524 TA01a  
3524f  
1
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中文翻译

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