SMBus Level 2 Battery Charger
with Remote Sense
Typical Operating Characteristics
(Circuit of Figure 1, adapter = 19.5V, ChargeVoltage() = 16.8V, ChargeCurrent() = 3.854A, InputCurrent() = 3.584A, T = +25°C,
A
unless otherwise noted.)
INPUT CURRENT-LIMIT ERROR
vs. INPUT CURRENT-LIMIT SETTING
INPUT CURRENT-LIMIT ERROR
vs. SYSTEM CURRENT
INPUT CURRENT-LIMIT ERROR
vs. SYSTEM CURRENT
6
1.0
0.8
0.4
0.2
0
INPUT CURRENT LIMIT = 3.584A
4
2
INPUT CURRENT LIMIT = 3.584A
0.6
MAXIMUM
0.4
V
= 16.8V
BATT
V
= 12.6V
BATT
0.2
TYPICAL
0
0
-0.2
-0.4
-0.6
-0.8
-1.0
INPUT CURRENT
LIMIT = 4.096A
-2
-4
-0.2
-0.4
MINIMUM
V
= 8.4V
3
BATT
INPUT CURRENT LIMIT = 2.048A
-6
0
2
4
6
8
10
0
1
2
4
0
1
2
3
4
INPUT CURRENT-LIMIT SETTING (A)
SYSTEM CURRENT (A)
SYSTEM CURRENT (A)
IINP ERROR vs. SYSTEM CURRENT
IINP ERROR vs. SYSTEM CURRENT
IINP ERROR vs. INPUT CURRENT
2.5
2.0
1.5
1.0
0.5
0
1.0
0.8
10
8
INPUT CURRENT LIMIT = 2.048A
V
= 12.6V
BATT
0.6
6
MAXIMUM
MINIMUM
NOT SWITCHING
0.4
4
INPUT CURRENT LIMIT = 3.584A
0.2
2
0
V
= 16.8V
BATT
0
V
= 8.4V
BATT
-0.2
-0.4
-0.6
-0.8
-1.0
-2
-4
-6
-8
-10
TYPICAL
INPUT CURRENT LIMIT = 4.096A
INPUT CURRENT LIMIT = 3.584A
OPERATING AT INPUT CURRENT LIMIT
0
1
2
3
4
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
SYSTEM CURRENT (A)
0
1
2
3
4
5
6
SYSTEM CURRENT (A)
INPUT CURRENT (A)
CHARGE-CURRENT ERROR
vs. BATTERY VOLTAGE
CHARGE-CURRENT ERROR
vs. CHARGE CURRENT-LIMIT SETTING
TRICKLE-CHARGE CURRENT ERROR
vs. BATTERY VOLTAGE
4
2
10
8
5
0
6
MAXIMUM
-5
3.072A
3.968A
4
2
-10
-15
-20
-25
0
0
-2
-4
-6
-8
-10
8.064A
TYPICAL
-2
-4
MINIMUM
ChargeCurrent( ) = 128mA
-30
3
6
9
12
15
18
0
2
4
6
8
0
3
6
9
12
15
18
BATTERY VOLTAGE (V)
CHARGE-CURRENT SETTING (A)
BATTERY VOLTAGE (V)
10 ______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
