Low-Cost Multichemistry Battery Chargers
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V
= 20V, T = +25°C, unless otherwise noted.)
A
DCIN
ICHG ERROR vs. CHARGE CURRENT
CURRENT SETTING ERROR vs. ICTL
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
5
4
3
2
1
0
V = 3.3V
REFIN
V
REFIN
= 3.3V
V
BATT
= 16V
V
V
= 12V
= 8V
BATT
BATT
-1
0
0
0.5
1.0
1.5
(A)
2.0
2.5
3.0
0.5
1.0
(V)
1.5
2.0
I
V
BATT
ICTL
IINP ERROR vs. SYSTEM LOAD CURRENT
IINP ERROR vs. INPUT CURRENT
40
30
80
60
20
40
ERROR DUE TO SWITCHING NOISE
I
= 0
BATT
10
20
0
0
-10
-20
-30
-40
-20
-40
-60
-80
SYSTEM LOAD = 0
0
1
2
3
4
0
0.5
1.0
1.5
2.0
SYSTEM LOAD CURRENT (A)
INPUT CURRENT (A)
10 ______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
