MCP73833-BZI/MF Microchip Technology, MCP73833-BZI/MF Datasheet - Page 19

• Manufacturer Part Number: MCP73833-BZI/MF
• Description: IC,Battery Management,LLCC,10PIN,PLASTIC
• Manufacturer: Microchip Technology

Specifications of MCP73833-BZI/MF

• Function: Charge Management
• Battery Type: Lithium-Ion (Li-Ion), Lithium-Polymer (Li-Pol)
• Voltage - Supply: 3.75 V ~ 6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-DFN
• Output Voltage: 4.2 V, 4.35 V, 4.4 V, 4.5 V
• Output Current: 1200 mA
• Operating Supply Voltage: 3.75 V to 6 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: MCP73833EV - BOARD EVAL FOR MCP73833
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

6.0
The MCP73833/4 is designed to operate in conjunction
with
applications. The MCP73833/4 provides the preferred
charge algorithm for Lithium-Ion and Lithium-Polymer
FIGURE 6-1:
FIGURE 6-2:
Thermal Regulation (1700 mAh Li-Ion Battery).
FIGURE 6-3:
with Thermal Regulation (1700 mAh Li-Ion
Battery).
© 2009 Microchip Technology Inc.
a
5.0
4.0
3.0
2.0
1.0
0.0
5.0
4.0
3.0
2.0
1.0
0.0
Regulated
Wall Cube
APPLICATIONS
host
MCP73833-FCI/MF
V
R
DD
PROG
= 5.2V
= 1.00 k:
microcontroller
Time (Minutes)
Time (Minutes)
Typical Application Circuit.
Typical Charge Profile with
Typical Charge Cycle Start
C
IN
MCP73833-FCI/MF
R
LED
PROG
or
V
= 1.00 k:
DD
= 5.2V
in
LED
stand-alone
LED
2.00
1.60
1.20
0.80
0.40
0.00
2.00
1.60
1.20
0.80
0.40
0.00
R
R
R
LED
LED
LED
1,2
3
4
7
Li-Ion Battery Charger
V
STAT1
STAT2
PG
cells Constant-current followed by Constant-voltage.
Figure 6-1
circuit,
accompanying charge profile.
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 scenario 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.
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 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.
DD
MCP73833
THERM
PROG
the
Application Circuit Design
while
V
V
BAT
SS
depicts a typical stand-alone application
COMPONENT SELECTION
Current Programming Resistor
(R
device
9,10
8
6
5
PROG
Figures
R
MCP73833/4
R
)
T1
C
has
PROG
OUT
6-2
transitioned
R
and
T2
6-3
DS22005B-page 19
T
+
-
Figure 6-1
Single
Li-Ion
Cell
10 kΩ
depict
from
the
the
is