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MAX712

更新时间: 2024-11-29 22:12:31
品牌 Logo 应用领域
美信 - MAXIM 电池控制器
页数 文件大小 规格书
18页 169K
描述
NiCd/NiMH Battery Fast-Charge Controllers

MAX712 数据手册

 浏览型号MAX712的Datasheet PDF文件第2页浏览型号MAX712的Datasheet PDF文件第3页浏览型号MAX712的Datasheet PDF文件第4页浏览型号MAX712的Datasheet PDF文件第5页浏览型号MAX712的Datasheet PDF文件第6页浏览型号MAX712的Datasheet PDF文件第7页 
19-0100; Rev 3; 1/97  
NiCd /NiMH Ba t t e ry  
Fa s t -Ch a rg e Co n t ro lle rs  
2/MAX713  
_______________Ge n e ra l De s c rip t io n  
____________________________Fe a t u re s  
The MAX712/MAX713 fast charge Nickel Metal Hydride  
(NiMH) and Nickel Cadmium (NiCd) batteries from a DC  
source at least 1.5V higher than the maximum battery  
voltage. 1 to 16 series cells can be charged at rates up  
to 4C. A voltage-slope detecting analog-to-digital convert-  
er, timer, and temperature window comparator determine  
charge completion. The MAX712/MAX713 are powered  
by the DC source via an on-board +5V shunt regulator.  
They draw a maximum of 5µA from the battery when not  
charging. A low-side current-sense resistor allows the  
b a tte ry c ha rg e c urre nt to b e re g ula te d while s till  
supplying power to the batterys load.  
Fast Charge NiMH or NiCd Batteries  
Voltage Slope, Temperature, and Timer  
Fast-Charge Cutoff  
Charge 1 to 16 Series Cells  
Supply Battery’s Load while Charging (Linear Mode)  
Fast Charge from C/4 to 4C Rate  
C/16 Trickle-Charge Rate  
Automatically Switch from Fast to Trickle Charge  
Linear or Switch-Mode Power Control  
5µA Max Drain on Battery when Not Charging  
5V Shunt Regulator Powers External Logic  
The MAX712 terminates fast charge by detecting zero  
volta g e s lop e , while the MAX713 us e s a ne g a tive  
voltage-slope detection scheme. Both parts come in 16-  
pin DIP and SO packages. An external power PNP tran-  
s is tor, b loc king d iod e , thre e re s is tors , a nd thre e  
capacitors are the only required external components.  
______________Ord e rin g In fo rm a t io n  
PART  
TEMP. RANGE  
0°C to +70°C  
PIN-PACKAGE  
16 Plastic DIP  
16 Narrow SO  
Dice*  
MAX712CPE  
MAX712CSE  
MAX712C/D  
MAX712EPE  
MAX712ESE  
MAX712MJE  
0°C to +70°C  
For high-power charging requirements, the MAX712/  
MAX713 can be configured as a switch-mode battery  
charger that minimizes power dissipation. Two evaluation  
kits are available: Order the MAX712EVKIT-DIP for quick  
evaluation of the linear charger, and the MAX713EVKIT-  
SO to evaluate the switch-mode charger.  
0°C to +70°C  
-40°C to +85°C  
-40°C to +85°C  
-55°C to +125°C  
16 Plastic DIP  
16 Narrow SO  
16 CERDIP**  
Ordering Information continued at end of data sheet.  
*Contact factory for dice specifications.  
**Contact factory for availability and processing to MIL-STD-883.  
________________________Ap p lic a t io n s  
Battery-Powered Equipment  
Laptop, Notebook, and Palmtop Computers  
Handy-Terminals  
__________Typ ic a l Op e ra t in g Circ u it  
Q1  
2N6109  
DC IN  
Cellular Phones  
Portable Consumer Products  
Portable Stereos  
R2  
150Ω  
C4  
0.01µF  
R1  
Cordless Phones  
DRV  
THI  
V+  
__________________P in Co n fig u ra t io n  
D1  
1N4001  
WALL  
CUBE  
TOP VIEW  
VLIMIT  
REF  
C1  
1µF  
BATT+  
REF  
V+  
VLIMIT  
BATT+  
PGM0  
PGM1  
THI  
1
2
3
4
5
6
7
8
16  
15  
14  
C3  
R3  
68kΩ  
10µF  
MAX712  
MAX713  
BATTERY  
DRV  
13 GND  
12 BATT-  
11 CC  
MAX712  
MAX713  
TEMP  
LOAD  
R4  
22kΩ  
10µF  
CC BATT- TLO GND  
TLO  
10  
9
PGM3  
PGM2  
TEMP  
C2  
0.01µF  
R
SENSE  
FASTCHG  
SEE FIGURE 19 FOR SWITCH-MODE CHARGER CIRCUIT.  
DIP/SO  
________________________________________________________________ Maxim Integrated Products  
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800  

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