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參數(shù)資料
| 型號： | MCP73832 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | Miniature Single-Cell, Fully Integrated Li-Ion, Li-Polymer Charge Management Controllers |
| 中文描述： | 微型單細(xì)胞，完全集成的鋰離子電池，鋰聚合物充電管理控制器 |
| 文件頁數(shù)： | 13/24頁 |
| 文件大?。?/td> | 696K |
| 代理商： | MCP73832 |
2006 Microchip Technology Inc.
DS21984B-page 13
MCP73831/2
6.0
APPLICATIONS
The MCP73831/2 are designed to operate in conjunc-
tion with a host microcontroller or in a stand-alone
application. The MCP73831/2 provide the preferred
charge algorithm for Lithium-Ion and Lithium-Polymer
cells constant current followed by constant voltage.
Figure 6-1 depicts a typical stand-alone application
circuit,
while
Figures 6-2
accompanying charge profile.
and 6-3
depict
the
FIGURE 6-1:
Typical Application Circuit.
FIGURE 6-2:
(180 mAh Battery).
Typical Charge Profile
FIGURE 6-3:
Thermal Regulation (1000 mAh Battery).
Typical Charge Profile in
6.1
Application Circuit Design
Due to the low efficiency of linear charging, the most
important factors are thermal design and cost, which
are a direct function of the input voltage, output current
and thermal impedance between the battery charger
and the ambient cooling air. The worst-case situation
is when the device has transitioned from the
Preconditioning mode to the Constant-Current mode.
In this situation, the battery charger has to dissipate
the maximum power. A trade-off must be made
between the charge current, cost and thermal
requirements of the charger.
6.1.1
COMPONENT SELECTION
Selection of the external components in Figure 6-1 is
crucial to the integrity and reliability of the charging
system. The following discussion is intended as a
guide for the component selection process.
6.1.1.1
Current Programming Resistor
(R
PROG
)
The preferred fast charge current for Lithium-Ion cells
is at the 1C rate, with an absolute maximum current at
the 2C rate. For example, a 500 mAh battery pack has
a preferred fast charge current of 500 mA. Charging at
this rate provides the shortest charge cycle times
without degradation to the battery pack performance
or life.
STAT
V
DD
V
SS
PROG
V
BAT
+
-
Single
Li-Ion
Cell
4
MCP73831
5
3
1
C
IN
Li-Ion Battery Charger
2
R
PROG
R
LED
C
OUT
REGULATED
WALL CUBE
LED
0.0
1.0
2.0
3.0
4.0
5.0
6.0
0
2
4
6
8
1
1
1
1
1
Time (minutes)
B
0
20
40
60
80
100
120
C
MCP73831-2AC/IOT
V
DD
= 5.2V
R
PROG
= 10 k
0.0
1.0
2.0
3.0
4.0
5.0
6.0
0
3
6
9
1
1
1
2
2
Time (minutes)
B
0
100
200
300
400
500
600
C
MCP73831-2AC/IOT
V
DD
= 5.2V
R
PROG
= 2 k
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MCP73832-2ACI/MC | 功能描述:電池管理 Li-Ion/Li-Poly Charg Mgnt 4.2V Vreg out RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| MCP73832-2ACI/OT | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Miniature Single-Cell, Fully Integrated Li-Ion, Li-Polymer Charge Management Controllers |
| MCP73832-2ADI/MC | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Miniature Single-Cell, Fully Integrated Li-Ion, Li-Polymer Charge Management Controllers |
| MCP73832-2ADI/OT | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Miniature Single-Cell, Fully Integrated Li-Ion, Li-Polymer Charge Management Controllers |
| MCP73832-2ATI/MC | 功能描述:電池管理 Li-Ion/Li-Poly Charg Mgnt 4.2V Vreg out RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
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