MAX8900B Просмотр технического описания (PDF) - Maxim Integrated
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MAX8900B
Maxim Integrated
MAX8900B Datasheet PDF : 35 Pages
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MAX8900A/MAX8900B/MAX8900C
1.2A Switch-Mode Li+ Chargers with ±22V Input
Rating and JEITA Battery Temperature Monitoring
ELECTRICAL CHARACTERISTICS (continued)
(VIN = 6V, VBAT = 4V, RSETI = 2.87kI, RDNI = 3.57kI, VTHM = VAVL/2, circuit of Figure 1, TA = -40NC to +85NC, unless otherwise
noted. Typical values are at TA = +25NC.) (Note 2)
PARAMETER
Done and Prequalification
Current Set Range
Done and Prequalification
Setting Resistor Range
Dead-Battery Charge Current
Dead-Battery Voltage Threshold
(Figure 6)
SYMBOL
RDNI
IDBAT
CONDITIONS
(Figure 5)
Minimum
Maximum
(Figure 5)
Minimum
Maximum
0V P VBAT P VDBAT
VDBAT
MIN TYP MAX UNITS
9.8
mA
200
1.91
kI
39.2
45
mA
2.5
V
BAT Leakage Current
VIN = 0V, VBAT = 4.2V,
TA = +25NC
includes LX leakage current
through the inductor
TA = +85NC
0.02
1
FA
0.05
Charger Soft-Start Time (Note 3)
tSS
CHARGE TIMER
1.5
ms
Prequalification/Dead-Battery
Time
tPQ
CCT = 0.1FF
30
min
Fast-Charge Time
Top-Off Time
Timer Accuracy
THERMISTOR MONITOR
tFC
CCT = 0.1FF
tTO
180
min
16
s
-15
+15
%
THM Hot Shutoff Threshold
(60NC)
T4
VTHM/AVL falling, 1% hysteresis
(thermistor temperature rising)
21.24 22.54 23.84 %AVL
THM Hot Voltage Foldback
Threshold (45NC)
T3
VTHM/AVL falling, 1% hysteresis
(thermistor temperature rising)
32.68 34.68 36.68 %AVL
THM Cold Current Foldback
Threshold (15NC)
T2
VTHM/AVL rising, 1% hysteresis
(thermistor temperature falling)
57.00 60.00 63.00 %AVL
THM Cold Shutoff Threshold
(-15NC/0NC)
THM Input Leakage
CHARGE ENABLE INPUT (CEN)
CEN Input Voltage Low
CEN Input Voltage High
CEN Internal Pulldown Resistance
T1
VIL
VIH
RCEN
VTHM/AVL rising, 1%
hysteresis (thermistor
temperature falling)
THM = GND or AVL
0NC, MAX8900A/
MAX8900C
-15NC, MAX8900B
TA = +25NC
TA = +85NC
71.06
81.43
-0.2
74.56
86.07
0.001
0.001
78.06
90.98
+0.2
%AVL
FA
0.6
V
1.4
V
100
200 400
kI
6
Maxim Integrated
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