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MAX1908

更新时间： 2024-11-28 14:57:31
品牌 Logo 应用领域
亚德诺 - ADI 电池
页数 文件大小 规格书
30页 661K
描述
低成本、多种化学类型电池充电器

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MAX1908 数据手册

 浏览型号MAX1908的Datasheet PDF文件第2页浏览型号MAX1908的Datasheet PDF文件第3页浏览型号MAX1908的Datasheet PDF文件第4页浏览型号MAX1908的Datasheet PDF文件第5页浏览型号MAX1908的Datasheet PDF文件第6页浏览型号MAX1908的Datasheet PDF文件第7页 
EVALUATION KIT AVAILABLE  
MAX1908/MAX8724/  
MAX8765/MAX8765A  
Low-Cost Multichemistry Battery Chargers  
General Description  
Features  
The MAX1908/MAX8724/MAX8765/MAX8765A highly  
integrated, multichemistry battery-charger control ICs  
simplify the construction of accurate and efficient charg-  
ers. These devices use analog inputs to control charge  
current and voltage, and can be programmed by the host  
or hardwired. The MAX1908/MAX8724/MAX8765/  
MAX8765A achieve high efficiency using a buck topology  
with synchronous rectification.  
o
0.5% Output Voltage Accuracy Using Internal  
Reference ( 0.4% for MAX8765A, 2-/3-Cell Only)  
4% Accurate Input Current Limiting  
5% Accurate Charge Current  
o
o
o Analog Inputs Control Charge Current and  
Charge Voltage  
o Outputs for Monitoring  
Current Drawn from AC Adapter  
Charging Current  
The MAX1908/MAX8724/MAX8765/MAX8765A feature  
input current limiting. This feature reduces battery  
charge current when the input current limit is reached  
to avoid overloading the AC adapter when supplying  
the load and the battery charger simultaneously. The  
MAX1908/MAX8724/MAX8765/MAX8765A provide out-  
puts to monitor current drawn from the AC adapter (DC  
input source), battery-charging current, and the pres-  
ence of an AC adapter. The MAX1908’s conditioning  
charge feature provides 300mA to safely charge deeply  
discharged lithium-ion (Li+) battery packs.  
AC Adapter Presence  
o Up to 17.6V Battery-Voltage Set Point  
o Maximum 28V Input Voltage  
o > 95% Efficiency  
o Shutdown Control Input  
o Charge Any Battery Chemistry  
The MAX1908 includes a conditioning charge feature  
while the MAX8724/MAX8765/MAX8765A do not.  
Li+, NiCd, NiMH, Lead Acid, etc.  
Ordering Information  
The MAX1908/MAX8724/MAX8765/MAX8765A charge two  
to four series Li+ cells, providing more than 5A, and are  
available in a space-saving, 28-pin, thin QFN package (5mm  
× 5mm). An evaluation kit is available to speed designs.  
PART  
TEMP RANGE  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
28 Thin QFN-EP*  
28 Thin QFN-EP*  
28 Thin QFN-EP*  
28 Thin QFN-EP*  
MAX1908ETI+  
MAX8724ETI+  
MAX8765ETI+  
MAX8765AETI+  
Applications  
Notebook and Subnotebook Computers  
Personal Digital Assistants  
Handheld Terminals  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
*EP = Exposed pad.  
Minimum Operating Circuit  
Pin Configuration  
AC ADAPTER  
INPUT  
TO EXTERNAL  
LOAD  
0.01Ω  
TOP VIEW  
CSSP  
DCIN  
CSSN  
CELLS  
LDO  
REFIN  
VCTL  
ICTL  
21 20 19 18 17 16 15  
BST  
LDO  
DLOV  
22  
14  
13  
DLOV  
GND  
ICTL  
ACIN  
ACOK  
23  
LX  
MAX1908  
MAX8724  
MAX8765  
DHI  
LX  
24  
25  
26  
27  
28  
BST  
12 REFIN  
11  
10 ACIN  
FROM HOST µP  
SHDN MAX8765A  
MAX1908  
MAX8724  
MAX8765  
MAX8765A  
DHI  
CSSN  
CSSP  
IINP  
ACOK  
DLO  
PGND  
ICHG  
IINP  
CCV  
CCI  
10µH  
9
8
ICHG  
CSIP  
SHDN  
0.015Ω  
CSIN  
BATT  
CCS  
+
1
2
3
4
5
6
7
BATT+  
REF  
CLS  
GND  
THIN QFN  
For pricing, delivery, and ordering information, please contact Maxim Direct  
19-2764; Rev 5; 11/09  
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.  
1234567...30

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