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MAX1679 Datasheet, PDF (3/12 Pages) Maxim Integrated Products – Single-Cell Li Battery Charger for Current-Limited Supply
◁
Single-Cell Li+ Battery Charger
for Current-Limited Supply
ELECTRICAL CHARACTERISTICS (continued)
(VIN = V CHG = +10V, VBATT = +4.2V, TSEL = GND, GATE = unconnected, ADJ = unconnected, THERM = 10kΩ to GND, TA = 0°C
to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
CHG Output Sink Current
V CHG = 1V, CHG = low
4
5
6
mA
THERM Sense Current (for hot
qualification)
346 352.9 360
µA
THERM Sense Current (for cold
qualification)
47.8 48.8 49.8
µA
THERM Sense Voltage Trip
Point
GATE Source/Sink Current
GATE Drive Current at Battery
Removal
VIN = 10V, VGATE = 8V
VBATT = 5.1V, gate driven high
1.379 1.40 1.421
V
%
75
105
130
µA
20
40
60
mA
ELECTRICAL CHARACTERISTICS
(VIN = V CHG = +10V, VBATT = +4.2V, TSEL = GND, GATE = unconnected, ADJ = unconnected, THERM = 10kΩ to GND, TA = -40°C
to +85°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
Input Voltage (Note 1)
VIN External PMOS FET off
5
Input Voltage for Removable
Battery (Note 1)
VIN External PMOS FET off
6
Undervoltage Lockout Trip Point
VBATT rising
2.05
Fast-Charge Qualification
Threshold
VBATT rising, transition from precharge to full
current
2.35
MAX UNITS
22
V
22
V
2.35
V
2.65
V
Fast-Charge Restart Threshold
Precharge Source Current
BATT Regulation Voltage
BATT Regulation Adjust Range
ADJ Source Impedance
ADJ Output Voltage
Battery Removal Detection
Threshold
BATT Input Current (Note 2)
BATT Input Current, Fast-
Charge State
BATT Input Current, Done State
IN Input Current, Fast-Charge
State
IBATT
IBATT
IIN
VBATT falling, transition from DONE to
PREQUAL state, Figure 2
VBATT = 2V
No load on ADJ
VBATT rising
VIN ≤ VBATT - 0.3V
VBATT = 4.0V
VBATT = 4.25V
VBATT = 4.0V, VIN = 4.0V
3.74
3
4.137
4.0
9.8
1.386
4.850
4.04
V
7
mA
4.263
V
4.2
V
10.2
kΩ
1.414
V
5.150
V
1
µA
1500 µA
1000 µA
100
µA
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