Datasheet

MCP73837/8
DS22071B-page 12 © 2007-2011 Microchip Technology Inc.
Note: Unless otherwise indicated, V
DD
= [V
REG
(typical) + 1V], I
OUT
= 30 mA and T
A
= +25°C, Constant-voltage mode.
UVLOVAC
FIGURE 2-25: V
USB
Start Delay (USB =
High)
FIGURE 2-26: Complete Charge Cycle
(1200 mAh Li-Ion Battery).
FIGURE 2-27: Typical Charge Profile in
Thermal Regulation (1200 mAh Li-Ion Battery).
FIGURE 2-28: Complete Charge Cycle
(180 mAh Li-Ion Battery).
FIGURE 2-29: Typical Charge Profile in
Preconditioning and CC-CV (180 mAh Li-Ion
Battery).
V
IN
V
OUT
0.0
1.0
2.0
3.0
4.0
5.0
0
10 20 30 40 50 60 70 80 90
100 110 120 130 140 150
Time (Minutes)
Battery Voltage (V)
0
0.2
0.4
0.6
0.8
1
1.2
Charge Current (A)
V
DD
= 5.2V
R
PROG
= 1 kΩ
1200 mAh Li-Ion Battery
V
OUT
I
OUT
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
012345678910
Time (Minutes)
Battery Voltage (V)
0
0.3
0.6
0.9
1.2
Charge Current (A)
V
DD
= 5.2V
R
PROG
= 1 kΩ
1200 mAh Li-Ion Battery
V
OUT
I
OUT
0.0
1.0
2.0
3.0
4.0
5.0
0 20 40 60 80 100 120 140 160 180
Time (Minutes)
Battery Voltage (V)
0
0.02
0.04
0.06
0.08
0.1
0.12
Charge Current (A)
V
DD
= 5.2V
R
PROG
= USB_Low
180 mAh Li-Ion Battery
V
OUT
I
OUT
0.0
1.0
2.0
3.0
4.0
5.0
012345678910
Time (Minutes)
Battery Voltage (V)
0
0.02
0.04
0.06
0.08
0.1
0.12
Charge Current (A)
V
DD
= 5.2V
R
PROG
= USB_Low
180 mAh Li-Ion Battery
C.C. Begins
Preconditioning
C.V. Begins
V
OUT
I
OUT