USB-Powered Li+ Charger
Typical Operating Characteristics (continued)
= 2.2µF, T = +25°C, unless otherwise noted.)
A
(CHG unconnected, C
BATT
CHARGE CURENT
vs. INPUT VOLTAGE
BATTERY REGULATION VOLTAGE
vs. TEMPERATURE
CHARGE CURRENT
vs. BATTERY CURRENT
4.22
4.20
4.18
4.16
4.14
4.12
4.10
4.08
500
450
400
350
300
250
200
150
100
50
500
450
400
350
300
250
200
V
V
= 4.1V
IN
BATT
SELV
V
IN
= V = V
= 5.5V
EN
SELV
= V
V
= V
IN
SELV
V
SELI
= V
IN
V
BATT
= V
= V = 4.5V
SELI EN
IN
V
V
= V
= 0
SELI
IN
I
= 0
SELI
V
SELI
= 0
150
100
50
V
SELV
= 0
35
0
0
-50
0
1
2
3
4
5
6
7
-40
-15
10
60
85
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
(V)
V
(V)
TEMPERATURE ( C)
IN
V
BATT
CHARGE CURRENT
vs. TEMPERATURE
CHARGE CURRENT vs. TEMPERATURE
WITH THERMAL REGULATION
600
600
500
400
300
200
100
0
V
IN
= V
= V = 5.5V, V
= 2.7V
V
= V
= V = 6.5V, V
= 2.7V
SELV
EN
BATT
IN
SELV
EN
BATT
500
400
300
200
100
0
V
= V
SELI
IN
V
SELI
= V
IN
THERMAL CONTROL
LOOP IN OPERATION
V
SELI
= 0
V
= 0
SELI
-40
-15
10
35
60
85
-40
-15
10
35
60
85
TEMPERATURE ( C)
TEMPERATURE ( C)
4
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
