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MP1529

更新时间： 2024-09-30 04:14:51
品牌 Logo 应用领域
芯源 - MPS 转换器闪光灯
页数 文件大小 规格书
11页 302K
描述
Fixed Frequency Step-Up Converter LCD Backlight Plus Flash

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中文翻译

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MP1529 数据手册

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TM  
MP1529  
Fixed Frequency Step-Up Converter  
LCD Backlight Plus Flash  
TM  
The Future of Analog IC Technology  
DESCRIPTION  
FEATURES  
The MP1529 is a step-up converter plus 3  
current sources for driving two 6-LED backlight  
strings to 30mA and a 4-LED flash string to  
150mA from a single Lithium-Ion battery.  
•
•
•
•
•
•
•
2.7V to 5.5V Input Voltage Range  
25V Maximum Step-Up Voltage  
<1µA Shutdown Mode  
1.2MHz Fixed Frequency Operation  
LCD Backlight to 30mA, Flash to 150mA  
Cycle-By-Cycle Current Limit  
Independent Backlight, Preview and Flash  
Current Adjustment  
Special PWM Dimming  
Over Voltage Protection  
Under Voltage Lockout  
Integrated Soft-Start  
The step-up converter generates an output  
voltage as high as 25V from a 2.7V to 5.5V  
input source. Three current sources drive in  
three modes. In backlight mode two strings of 6  
LEDs are lit with up to 30mA of current. In the  
backlight plus preview mode the 4 flash LEDs  
are lit with the preview current. In flash mode  
the flash LEDs are lit with up to 150mA of  
current and the two backlight strings are turned  
off. There are three pins to independently set  
the backlight, preview and flash current.  
•
•
•
•
•
•
Thermal Shutdown  
Tiny 4mm x 4mm QFN Package  
APPLICATIONS  
The MP1529 includes built-in open lamp over  
voltage protection, cycle-by-cycle current limit,  
over temperature shutdown, input under voltage  
control and integrated soft-start.  
•
•
•
•
PDAs  
Cellular Phones  
Digital Still Cameras  
Digital Video Cameras  
The MP1529 is available in a tiny 16-pin 4mm x 4mm  
package.  
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic  
Power Systems, Inc.  
TYPICAL APPLICATION  
V
V
OUT  
IN  
D1  
Efficiency vs LED Current  
(Backlight Mode, 2 Strings of 3 LEDs)  
14  
12  
16  
1
IN  
SW  
82  
OUT  
EN1  
EN2  
EN1  
EN2  
COMP  
V
=4.2V  
IN  
80  
78  
76  
74  
72  
2
3
V
=3.6V  
IN  
C4  
10nF  
MP1529  
4
SS  
V
=2.7V  
IN  
8
9
ISET1  
ISET2  
ISET3  
GND  
LED1  
LED2  
LED3  
PGND  
7
10  
11  
6
5
13, 15  
2
4
6
8
10 12 14 16 18 20  
LED CURRENT (mA)  
GND  
MP1529_EC01  
MP1529_TAC_S01  
MP1529 Rev. 1.0  
11/23/2005  
www.MonolithicPower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2005 MPS. All Rights Reserved.  
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