MAX8731 Просмотр технического описания (PDF) - Maxim Integrated
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MAX8731 Datasheet PDF : 32 Pages
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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, TA = +25°C,
unless otherwise noted.)
INPUT CURRENT-LIMIT ERROR
vs. INPUT CURRENT-LIMIT SETTING
6
4
2
TYPICAL
0
MAXIMUM
-2
MINIMUM
-4
-6
0
2
4
6
8 10
INPUT CURRENT-LIMIT SETTING (A)
INPUT CURRENT-LIMIT ERROR
vs. SYSTEM CURRENT
0.4
INPUT CURRENT LIMIT = 3.584A
0.2
0
INPUT CURRENT
LIMIT = 4.096A
-0.2
INPUT CURRENT LIMIT = 2.048A
-0.4
0
1
2
3
4
SYSTEM CURRENT (A)
INPUT CURRENT-LIMIT ERROR
vs. SYSTEM CURRENT
1.0
0.8 INPUT CURRENT LIMIT = 3.584A
0.6
0.4
VBATT = 16.8V
0.2
VBATT = 12.6V
0
-0.2
-0.4
-0.6
VBATT = 8.4V
-0.8
-1.0
0
1
2
3
4
SYSTEM CURRENT (A)
IINP ERROR vs. SYSTEM CURRENT
1.0
0.8 INPUT CURRENT LIMIT = 2.048A
0.6
0.4
0.2
INPUT CURRENT LIMIT = 3.584A
0
-0.2
-0.4
-0.6
INPUT CURRENT LIMIT = 4.096A
-0.8 OPERATING AT INPUT CURRENT LIMIT
-1.0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
SYSTEM CURRENT (A)
IINP ERROR vs. SYSTEM CURRENT
2.5
VBATT = 12.6V
2.0
1.5
VBATT = 16.8V
1.0 VBATT = 8.4V
0.5
0
0
INPUT CURRENT LIMIT = 3.584A
1
2
3
4
SYSTEM CURRENT (A)
IINP ERROR vs. INPUT CURRENT
10
8
6
NOT SWITCHING
4
MAXIMUM
2
0
-2
-4
TYPICAL
-6
MINIMUM
-8
-10
0123456
INPUT CURRENT (A)
CHARGE-CURRENT ERROR vs.
CHARGE CURRENT-LIMIT SETTING
10
8
6
MAXIMUM
4
2
0
-2
-4
TYPICAL
-6
MINIMUM
-8
-10
0
2
4
6
8
CHARGE-CURRENT SETTING (A)
CHARGE-CURRENT ERROR
vs. BATTERY VOLTAGE
4
2
3.072A 3.968A
0
8.064A
-2
-4
3
6
9
12
15
18
BATTERY VOLTAGE (V)
TRICKLE-CHARGE CURRENT ERROR
vs. BATTERY VOLTAGE
0
ChargeCurrent( ) = 128mA
-5
-10
-15
-20
-25
-30
0
3
6
9
12 15 18
BATTERY VOLTAGE (V)
10 ______________________________________________________________________________________
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