MAX1909 Maxim Integrated Products, MAX1909 Datasheet - Page 11

• Manufacturer Part Number: MAX1909
• Description: (MAX8725 / MAX1909) Multichemistry Battery Charger
• Manufacturer: Maxim Integrated Products

Multichemistry Battery Chargers with Automatic
(Circuit of Figure 2, V
500
450
400
350
300
250
200
150
100
-1
-2
50
-2
-4
-6
-8
4
3
2
1
0
0
8
6
4
2
0
1.5
0
SWITCHING FREQUENCY vs. V
0
IINP ACCURACY vs. INPUT CURRENT
V
INPUT CURRENT-LIMIT ACCURACY
BATT
2.0 2.5
______________________________________________________________________________________
DCIN
0.5
V
BATT
= 16V
2
= 13V
1.0
vs. SYSTEM LOAD
= 20V, charge current = 3A, 4 Li+ series cells, T
INPUT CURRENT (A)
3.0 3.5
SYSTEM LOAD (A)
V
V
IN
BATT
4
1.5
- V
= 12V
BATT
4.0 4.5 5.0 5.5 6.0
2.0
V
BATT
(V)
6
= 10V
2.5
IN
8
3.0
- V
BATT
Typical Operating Characteristics (continued)
3.5
10
System Power Selector
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
A
-1
-2
-1
-2
-3
4
3
2
1
0
0
3
2
1
0
INPUT CURRENT-LIMIT ACCURACY vs. V
= +25°C, unless otherwise noted.)
0.5
1.5
0
V
MAX1909 ONLY
V
BATT
INPUT CURRENT-LIMIT ACCURACY
BATT
IINP ERROR vs. INPUT CURRENT
0.5
= 16V
= 13V
1.0
2.0
V
I
CHARGE
1.0
vs. SYSTEM LOAD
BATT
INPUT CURRENT (A)
SYSTEM LOAD (A)
= 12V
1.5
1.5
= 3A
V
CLS
2.5
DISABLED
CHARGER
(V)
2.0
2.0
V
BATT
2.5
3.0
= 10V
2.5
3.0
3.0
3.5
3.5
CLS
11