MAX1898 Ver la hoja de datos (PDF) - Maxim Integrated
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MAX1898 Datasheet PDF : 12 Pages
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Linear Charger for Single-Cell Li+ Battery
Typical Operating Characteristics
(VIN = 5V, VBATT = 4V, EN/OK = open, RSET = 2.8kΩ, RSTRT = GND, TA = +25°C, unless otherwise noted.)
NORMALIZED TIMER PERIOD
vs. TEMPERATURE
1.02
NORMALIZED TO +25°C
1.00
0.98
NORMALIZED BATT REGULATION
VOLTAGE vs. TEMPERATURE
1.002
NORMALIZED TO +25°C
1.001
1.000
PRECHARGE CURRENT
vs. INPUT VOLTAGE
60
ISET = 2.8kΩ
CHARGING CURRENT SET
FOR 500mA
55
0.96
0.999
50
0.94
0.998
45
0.92
0.997
0.90
-40
-15 10
35
60
85
TEMPERATURE (°C)
0.996
-40
NORMALIZED BATTERY CURRENT
vs. BATTERY VOLTAGE
1.2
-15 10
35
60
TEMPERATURE (°C)
60
40
85
5 6 7 8 9 10 11 12
VIN (V)
VOLTAGE-LOOP GAIN
MAX1898 toc05
200
1.0
40
150
0.8
GAIN
PHASE
20
100
0.6
0
50
0.4
0.2
-20
0
0
3.9
4.0
4.1
4.2
4.3
BATTERY VOLTAGE (V)
-40
0.01
0.1
1
10 100
FREQUENCY (kHz)
-50
1000
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