MAX1873S Просмотр технического описания (PDF) - Maxim Integrated
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MAX1873S Datasheet PDF : 14 Pages
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Simple Current-Limited Switch-Mode
Li+ Charger Controller
Typical Operating Characteristics
(Circuit of Figure 1, VDCIN = VCSSP = VCSSN = 18V, VICHG/EN = VREF, VVADJ = VREF/2. MAX1873R: VBATT = VCSB = 8.4V;
MAX1873S: VBATT = VCSB = 12.6V; MAX1873T: VBATT = VCSB = 16.8V; TA = +25°C, unless otherwise noted).
MAX1873T (4-CELL)
BATTERY VOLTAGE vs. CHARGING CURRENT
17.5
15.0
12.5
10.0
7.5
5.0
2.5
0
0
RCSB + 0.068Ω
0.5 1.0 1.5 2.0 2.5 3.0 3.5
CHARGING CURRENT (A)
MAX1873T (4-CELL)
BATTERY REGULATION VOLTAGE
vs. VADJ VOLTAGE
18.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
IOUT VOLTAGE
vs. CSB-BATT VOLTAGE
50 100 150 200 250
CSB-BATT VOLTAGE (mV)
RECENT VOLTAGE VS. TEMPERATURE
4.210
17.5
17.0
16.5
16.0
15.5
0
1
2
3
4
5
VADJ VOLTAGE (V)
RECENT VOLTAGE
VS. REFERENCE CURRENT
4.210
4.205
4.200
4.195
4.190
4.185
MAX1873T
4.180
-50 -25 0
25 50 75 100
TEMPERATURE (°C)
MAX1873R (2-CELL)
EFFICIENCY vs. INPUT VOLTAGE
100
4.205
90
4.200
80
4.195
70
4.190
4.185
MAX1873T
4.180
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
REFERENCE VOLTAGE (mA)
60
VBATT = 7V
ICHG = 3A
50
8
12
16
20
24
28
INPUT VOLTAGE (V)
6 _______________________________________________________________________________________
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