MCP73837 Datasheet, PDF (12/30 Pages) Microchip Technology – Advanced Stand-Alone Li-Ion / Li-Polymer Battery Charge Management Controller with Autonomous AC-Adapter or USB-Port Source Selection

MCP73837/8
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:
(USB = High)
V_USB UVLO Start Delay
5.0
0.12
4.0
0.1
3.0
2.0
1.0
V_DD = 5.2V
R_PROG = USB_Low
180 mAh Li-Ion Battery
0.0
0 20 40 60 80 100 120 140 160 180
0.08
0.06
0.04
0.02
0
Time (Minutes)
FIGURE 2-28:
Complete Charge Cycle
(180 mAh Li-Ion Battery).
5.0
1.2
4.0
1
0.8
3.0
0.6
2.0
0.4
1.0 ^{VDD = 5.2V}
R_PROG = 1 kΩ
0.2
1200 mAh Li-Ion Battery
0.0
0
Time (Minutes)
FIGURE 2-26:
Complete Charge Cycle
(1200 mAh Li-Ion Battery).
4.5
1.2
4.0
3.5
0.9
3.0
2.5
0.6
2.0
1.5
1.0
V_DD = 5.2V
R_PROG = 1 kΩ
0.3
0.5 1200 mAh Li-Ion Battery
0.0
0
0 1 2 3 4 5 6 7 8 9 10
Time (Minutes)
FIGURE 2-27:
Typical Charge Profile in
Thermal Regulation (1200 mAh Li-Ion Battery).
5.0
4.0
3.0
2.0
1.0
0.0
0
C.C. Begins
0.12
0.1
0.08
C.V. Begins ^0.06
Preconditioning
1234
V_DD = 5.2V
R_PROG = USB_Low
180 mAh Li-Ion Battery
0.04
0.02
0
5 6 7 8 9 10
Time (Minutes)
FIGURE 2-29:
Typical Charge Profile in
Preconditioning and CC-CV (180 mAh Li-Ion
Battery).
DS22071A-page 12
© 2007 Microchip Technology Inc.