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參數(shù)資料
| 型號(hào)： | MCP73832-5DCI/MC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | 2 X 3 MM, 0.90 MM HEIGHT, PLASTIC, MO-229VCED-2, DFN-8 |
| 文件頁(yè)數(shù)： | 5/24頁(yè) |
| 文件大小： | 786K |
| 代理商： | MCP73832-5DCI/MC |
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2007 Microchip Technology Inc.
DS21984C-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
and 6-3
depict
the
accompanying charge profile.
FIGURE 6-1:
Typical Application Circuit.
FIGURE 6-2:
Typical Charge Profile
(180 mAh Battery).
FIGURE 6-3:
Typical Charge Profile in
Thermal Regulation (1000 mAh Battery).
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
(RPROG)
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
VDD
VSS
PROG
VBAT
+
-
Single
Li-Ion
Cell
4
MCP73831
5
3
1
CIN
Li-Ion Battery Charger
2
RPROG
RLED
COUT
REGULATED
WALL CUBE
LED
0.0
1.0
2.0
3.0
4.0
5.0
6.0
0
20
40
60
80
10
0
12
0
14
0
16
0
18
0
Time (minutes)
Ba
tt
e
ry
Vo
lt
ag
e(
V
)
0
20
40
60
80
100
120
Ch
arge
Curre
nt
(m
A
)
MCP73831-2AC/IOT
VDD = 5.2V
RPROG = 10 k
0.0
1.0
2.0
3.0
4.0
5.0
6.0
0
30
60
90
12
0
15
0
18
0
21
0
24
0
Time (minutes)
B
atte
ry
Vo
lta
g
e(V
)
0
100
200
300
400
500
600
Ch
arge
Curre
nt
(m
A
)
MCP73831-2AC/IOT
VDD = 5.2V
RPROG = 2 k
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相關(guān)代理商/技術(shù)參數(shù) |
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| MCP73832T | 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 |
| MCP73832T-2ACI/MC | 功能描述:電池管理 Charge mgnt contr 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 |
| MCP73832T-2ACI/OT | 功能描述:電池管理 Charge mgnt contr 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 |
| MCP73832T-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 |
| MCP73832T-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 |
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