MCP73113-0NSI/MF MICROCHIP [Microchip Technology], MCP73113-0NSI/MF Datasheet - Page 21

• Manufacturer Part Number: MCP73113-0NSI/MF
• Description: Single-Cell Li-Ion / Li-Polymer Battery Charge Management Controller with Input Overvoltage Protection
• Manufacturer: MICROCHIP [Microchip Technology]

6.0
The MCP73113/4 deviced are designed to operate in
conjunction with a host microcontroller or in
standalone applications. The MCP73113/4 provides
the preferred charge algorithm for Lithium-Ion and
Lithium-Polymer cells Constant-current followed by
FIGURE 6-1:
FIGURE 6-2:
(875 mAh Battery).
6.1
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
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.
© 2009 Microchip Technology Inc.
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
the
0
Ac-dc Adapter
APPLICATIONS
Application Circuit Design
R
875 mAh Battery
PROG
15
device
= 2 kΩ
30
45
Time (Minutes)
Typical Application Circuit.
Typical Charge Profile
has
C
60
IN
transitioned
75
90
105 120
R
LED
from
MCP73113/4 Typical Application
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
1
2
7
5
6
the
V
V
STAT
NC
NC
DD
DD
Constant-voltage.
standalone
depicts the accompanying charge profile.
6.1.1
Selection of the external components in
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
The preferred fast charge current for Li-Ion / Li-Poly
cells is below the 1C rate, with an absolute maximum
current at the 2C rate. The recommended fast charge
current
manufacturer. For example, a 500 mAh battery pack
with 0.7C preferred fast charge current has a charge
current of 350 mA. Charging at this rate provides the
shortest charge cycle times without degradation to the
battery pack performance or life.
PROG
Note:
V
V
V
V
BAT
BAT
SS
SS
3
4
10
9
8
should
COMPONENT SELECTION
Please consult with your battery supplier
or refer to battery data sheet for preferred
charge rate.
application
Charge Current
C
R
OUT
Figure 6-1
be
PROG
MCP73113/4
obtained
circuit,
depicts
+
–
while
DS22183B-page 21
1-Cell
Li-Ion
Battery
from
Figure 6-1
a
Figure 6-2
battery
typical
is