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MCP73871-2CCI/ML Datasheet(PDF) 25 Page - Microchip Technology

Part # MCP73871-2CCI/ML
Description  Stand-Alone System Load Sharing and Li-Ion / Li-Polymer Battery Charge Management Controller
PDF  38 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP73871-2CCI/ML Datasheet(HTML) 25 Page - Microchip Technology

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© 2009 Microchip Technology Inc.
DS22090B-page 25
MCP73871
6.0
APPLICATIONS
The MCP73871 device is designed to operate in
conjunction
with
a
host
microcontroller
or
in
stand-alone applications. The MCP73871 device
provides 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
MCP73871
application
circuit,
while
Figures 6-2 and 6-3 depict the accompanying charge
profile.
FIGURE 6-1:
MCP73871Typical Stand-Alone Application Circuit with VPCC.
FIGURE 6-2:
Typical Charge Profile
(1000 mAh Battery).
FIGURE 6-3:
Typical Charge Profile in
Preconditioning (1000 mAh Battery).
STAT1
LBO
IN
OUT
PG
VBAT
Single-Cell
Li-Ion Battery
7
MCP73871 Device Typical Application
1, 20
8
18, 19
10 µF
10, 11, EP
5V AC-DC Adapter
or
USB Port
STAT2
THERM
VSS
PROG1
PROG3
12
13
RPROG1
6
5
14, 15, 16
470
Ω
470
Ω
470
Ω
2
4.7 µF
System
Load
SEL
TE
PROG2
Hi
Low
Hi
Low
Hi
Low
3
4
9
RPROG3
VPCC
NTC
10 k
Ω
Hi
Low
17
CE
4.7 µF
330 k
Ω
110 k
Ω
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
0
1020304050607080
Time (Minute)
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
MCP73871
VDD = 5.2V
RPROG1 = 1 kΩ
RPROG3 = 25 kΩ
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
0
0.2
0.4
0.6
0.8
1
Time (Minute)
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Preconditioning
Preconditioning Threshold Voltage
Fast Charge (Constant Current)
MCP73871
VDD = 5.2V
RPROG1 = 1 kΩ
RPROG3 = 25 kΩ



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