MAX8725 Ver la hoja de datos (PDF) - Maxim Integrated
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MAX8725 Datasheet PDF : 30 Pages
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Multichemistry Battery Chargers with Automatic
System Power Selector
Typical Operating Characteristics (continued)
(Circuit of Figure 2, VDCIN = 20V, charge current = 3A, 4 Li+ series cells, TA = +25°C, unless otherwise noted.)
LINE-TRANSIENT RESPONSE
30V MAX1909/MAX8725 toc03
VDCIN
20V
INDUCTOR CURRENT
200mA/div
3A
500µs/div
VBATT AC-COUPLED
200mV/div
1.8V
VCCV
1.6V
LDO LOAD REGULATION
0
-0.2
-0.4
-0.6
-0.8
-1.0
-1.2
-1.4
0 1 2 3 4 5 6 7 8 9 10
LDO CURRENT (mA)
LDO LINE REGULATION
0.10
0.05
0
-0.05
-0.10
0
10
20
30
INPUT VOLTAGE (V)
REF vs. TEMPERATURE
0.10
0.05
0
-0.05
-0.10
-0.15
-0.20
-40 -15
10
35
60
85
TEMPERATURE (°C)
0
-0.02
-0.04
-0.06
-0.08
-0.10
-0.12
-0.14
0
REF LOAD REGULATION
200 400 600 800 1000
REF CURRENT (µA)
EFFICIENCY vs. CHARGE CURRENT
100
98 4 CELLS
96
94
92
3 CELLS
90
88
86
84
82
80
0
0.5 1.0 1.5 2.0 2.5 3.0
CHARGE CURRENT (A)
10 ______________________________________________________________________________________
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