MAX1870A データシートの表示（PDF） - Maxim Integrated
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MAX1870A Datasheet PDF : 32 Pages
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Step-Up/Step-Down
Li+ Battery Charger
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VDCIN = 16V, CELLS = REFIN, VCLS =VREF, VICTL = VREFIN = 3.3V, TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. BATTERY VOLTAGE
95
90
VIN = 12V
85
80
VIN = 16V
75
70
65
60
2 4 6 8 10 12 14 16 18
BATTERY VOLTAGE (V)
EFFICIENCY vs. CHARGE CURRENT
100
VBATT = 16.8V
95
90
85
VBATT = 12.6V
80
VBATT = 8.4V
75
70
65
60
0
0.5 1.0 1.5 2.0 2.5
CHARGE CURRENT (A)
BATTERY VOLTAGE ERROR vs. VCTL
0.25
0.20
0.15
0.10
0.05
0
0
1.00
2.00
3.00
4.00
VCTL (V)
IINP ERROR vs. SYSTEM LOAD
5
4
3
2
1
0
-1
-2
-3
-4
-5
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
SYSTEM LOAD (A)
CHARGE-CURRENT ERROR vs. ICTL
20
10
0
-10
-20
-30
-40
-50
-60
-70
-80
0
0.50 1.00 1.50 2.00 2.50 3.00
VICTL (V)
10
8
6
4
2
0
-2
-4
-6
-8
-10
0
INPUT CURRENT-LIMIT ERROR
vs. SYSTEM CURRENT
VBATT = 10V VBATT = 8V
VBATT = 14V
VBATT = 6V
VBATT = 16V
VBATT = 12V
0.5 1.0 1.5 2.0 2.5 3.0 3.5
SYSTEM CURRENT (A)
BATTERY VOLTAGE ERROR IN CV MODE
0.5
0.4
VBATT = 12.6V
0.3
0.2
0.1
VBATT = 16.8V
0
VBATT = 8.4V
-0.1
-0.2
-0.3
-0.4
-0.5
0
0.5 1.0 1.5 2.0 2.5
CHARGE CURRENT (A)
CHARGE-CURRENT ERROR
vs. BATTERY VOLTAGE
15
ICHG = 0.15A
10
ICHG = 2.4A
5
0
ICHG = 1.9A
-5
ICHG = 1.4A
-10
-15
0
5
10
15
20
VBATT (V)
200
150
100
50
0
-50
-100
-150
-200
-250
-300
0
INPUT CURRENT-LIMIT ERROR
vs. CLS
1.00 2.00 3.00 4.00 5.00
VCLS (V)
10 ______________________________________________________________________________________
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