MAX1772(2002) 查看數據表（PDF） - Maxim Integrated
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MAX1772 Datasheet PDF : 20 Pages
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Low-Cost, Multichemistry Battery-
Charger Building Block
Typical Operating Characteristics (continued)
(Circuit of Figure 1a, VDCIN = 20V, TA = +25°C, unless otherwise noted.)
LDO LINE REGULATION
1.0
LDO = 5.40V
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
8
12
16
20
24
28
DCIN (V)
REF VOLTAGE LOAD REGULATION
0.20
VCTL = 0
0.15 ICTL = 3.3V
0.10
CELL = 4
REF = 4.096V
0.05
0
-0.05
-0.10
-0.15
-0.20
0 50 100 150 200 250 300 350 400 450 500
REF CURRENT (µA)
REF VOLTAGE ERROR vs. TEMPERATURE
0.5
ICTL = 0
0.4 VCTL = 0
0.3 NO LOAD
REF = 4.096V
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
-40 -15
10
35
60
85
TEMPERATURE (°C)
EFFICIENCY vs. BATTERY CURRENT
(VOLTAGE CONTROL LOOP)
100
VCTL = 0
90 ICTL = 3.3V
80 REFIN = 3.3V
70
CELL = 4
60
CELL = 3
50
CELL = 2
40
30
20
10
0
0.1
1
10 100 1000 10,000
BATT CURRENT (mA)
EFFICIENCY vs. BATTERY CURRENT
(CURRENT CONTROL LOOP)
100
90
80
CELL = 4
70
CELL = 3
CELL = 2
60
50
40
30
20 VCTL = 0
10 ICTL = 3.3V
REFIN = 3.3V
0
100
1000
BATT CURRENT (mA)
10,000
8 _______________________________________________________________________________________
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