MAX1909 Ver la hoja de datos (PDF) - Maxim Integrated
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MAX1909 Datasheet PDF : 30 Pages
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Multichemistry Battery Chargers with Automatic
System Power Selector
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, VDCIN = VCSSP = VCSSN = 18V, VBATT = VCSIP = VCSIN = 12V, VVCTL = VICTL = 1.8V, MODE = float, ACIN = 0, CLS =
REF, GND = PGND = 0, PKPRES = GND, LDO = DLOV, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
PDL Turn-On Resistance
PDL Turn-Off Current
SRC Input Bias Current
PDL = GND
VSRC - VPDL = 1.5V
SRC = 19V, DCIN = 0V
SRC = 19, VBATT = 16V
50
100
150
kΩ
6
12
mA
1
µA
450 1000
Delay Time Between PDL and
PDS Transitions
2.5
5
7.5
µs
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, VDCIN = VCSSP = VCSSN = 18V, VBATT = VCSIP = VCSIN = 12V, VVCTL = VICTL = 1.8V, MODE = float, ACIN = 0, CLS =
REF, GND = PGND = 0, PKPRES = GND, LDO = DLOV, TA = -40°C to +85°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
CHARGE VOLTAGE REGULATION
VCTL Range
0
3.6
V
VVCTL = 3.6V (3 or 4 cells); not including
-0.8
VCTL resistor tolerances
+0.8
Battery Regulation Voltage
Accuracy
VVCTL = 3.6V/20 (3 or 4 cells); not including -0.8
VCTL resistor tolerances
VVCTL = 3.6V (3 or 4 cells); including VCTL
resistor tolerances of 1%
-1.0
+0.8
%
+1.0
VVCTL = VLDO (3 or 4 cells, default
-0.8
threshold of 4.2V/cell)
+0.8
VVCTL Default Threshold
VCTL Input Bias Current
CHARGE-CURRENT REGULATION
ICTL Range
VVCTL rising
VVCTL = 3V
VDCIN = 0V, VVCTL = 5V
MAX1909
MAX8725
4.1
4.3
V
0
2.5
µA
0
12
0
3.6
V
0
3.2
CSIP-to-CSIN Full-Scale Current-
Sense Voltage
69.37
80.63 mV
MAX1909: VICTL = 3.6V (not including ICTL
-7.5
resistor tolerances)
+7.5
MAX8725: VICTL = 3.2V (not including ICTL
-5
+5
resistor tolerances)
Charge-Current Accuracy
MAX1909: VICTL = 3.6V x 0.5, MAX8725:
VICTL = 3.2V x 0.5 (not including ICTL
-5
resistor tolerances)
+5
%
MAX1909: VICTL = 0.9V (not including ICTL
resistor tolerances)
-7.5
MAX8725: VICTL = 0.18V (not including
-30
ICTL resistor tolerances)
+7.5
+30
6 _______________________________________________________________________________________
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