MAX8900B(2010) View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX8900B
(Rev.:2010)
(Rev.:2010)
Maxim Integrated
MAX8900B Datasheet PDF : 35 Pages
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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
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Minimum On-Time
tON-MIN
90
ns
Maximum On-Time
tON-MAX
9
Fs
Minimum Off-Time
tOFF
75
ns
TA = +25NC, VTHM between
T1 and T3
4.179
4.200
4.221
IBAT = 0mA, TA = -40NC to +85NC, VTHM 4.158 4.200 4.242
BAT Regulation Voltage (Note 3)
VBATREG
MAX8900A/
MAX8900B
(Figure 10)
between T1 and T3
TA = +25NC, VTHM between
T3 and T4 (Note 5)
4.055
4.075
4.095
V
TA = -40NC to +85NC, VTHM
between T3 and T4 (Note 5)
4.034
4.075
4.100
Charger Restart Threshold
(Note 6)
BAT Prequalification Lower
Threshold (Figure 6)
VRSTRT
VTHM between T1 and T3
VTHM between T3 and T4
VPQLTH VBAT rising,180mV hysteresis
-70 -100 -125
mV
-75
2.1
V
BAT Prequalification Upper
Threshold (Figure 6) (Note 3)
VPQUTH
VBAT rising, 180mV typical hysteresis,
MAX8900A/MAX8900B
2.7
2.8
2.9
V
Fast-Charge Current
Fast-Charge Current Set Range
Fast-Charge Setting Resistor
Range
Done Current
Prequalification Current
RSETI = 2.87kI
1166 1190 1214
VTHM between T2
and T4 (Figure 10)
RSETI = 6.81kI
490 500 510
mA
IFC
RSETI = 34.0kI
99
101 103
VTHM between T1 and T2 (Figure 10); the
fast-charge current is reduced to 50% the
50
%
value programmed by RSETI
(Figure 5)
Minimum
Maximum
50
mA
1200
RSETI (Figure 5)
Minimum
Maximum
2.87
kI
68.1
RDNI = 3.83kI (Note 5) 93
99
105
VTHM between T2
and T4 (Figure 10)
RDNI = 7.68kI
(Note 5)
47
50
53
mA
IDN
RDNI = 38.3kI
9.5 10.5 11.5
VTHM between T1 and T2 (Figure 10); the
done current threshold is reduced to 50%
50
%
the value programmed by RDNI
VTHM between T2 RDNI = 3.83kI (Note 5) 95
105 115
and T4 (Figure 10), RDNI = 7.68kI (Note 5) 49
54
59
mA
VBAT = 2.6V
IPQ
RDNI = 38.3kI (Note 5) 10
11.5
13
VTHM between T1 and T2 (Figure 10); the
prequalification current is reduced to 50%
50
%
the value programmed by RDNI
5
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