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MAX1925 датащи(PDF) 3 Page - Maxim Integrated Products

номер детали MAX1925
подробное описание детали  Switch-Mode 1-Cell Li Chargers
PDF  16 Pages
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производитель  MAXIM [Maxim Integrated Products]
домашняя страница  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1925 датащи(HTML) 3 Page - Maxim Integrated Products

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Switch-Mode 1-Cell Li+ Chargers
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(VPGND = VGND = 0, VINP = VIN = VCHG = 5V, VBATT = VCS = VEN = 4V, THRM = 10k
Ω to GND, CCT = 100nF, TA = 0°C to +85°C,
unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Restart Threshold
Charging restarts when BATT falls to this point
3.92
4.00
4.08
V
BATT Voltage Fault Threshold
If BATT exceeds this threshold, EXT is high
(external MOSFET is off) and CHG blinks
4.275
4.350
4.425
V
CURRENT LOOP
VCS - VBATT, average value
132
142
152
CS - BATT Sense Threshold
Rise/fall hysteresis
30
mV
Prequal1 Charge Current
VBATT < 2V
3
4
6
mA
Average value, 2V < VBATT < 3V (charge current is C/10)
14
Prequal2 CS - BATT Sense
Threshold
Rise/fall hysteresis, 2V < VBATT < 3V
12
mV
Current Threshold for
Full-Battery Indication
ILOAD falling, as percentage of fast charge current
6
12
20
%
DRIVER FUNCTIONS
EXT Sink/Source Current
1
A
EXT On-Resistance
EXT high or low
5
12
Ω
Nominal Switching Frequency
VBATT = 3.6V, L =10µH
235
kHz
TIMER FUNCTIONS
Full-Time Timeout - tFULL
CCT = 100nF
3.02
hours
Prequal1 Timeout
CCT = 100nF
tFULL/1088
(10s)
s
Prequal2 Timeout
CCT = 100nF
tFULL/17
(10.67 min)
min
Timer Accuracy
CCT = 100nF for 3 hours
-15
+15
%
CHG Output Low Current
VCHG = 1V
7
10
14
mA
CHG Output High Leakage
Current
VCHG = 12V
1
µA
CHG Blink Rate - Fault
Fault state (50% duty cycle), CCT = 100nF
0.5
Hz
ACON High Leakage
VACON = 12V
0.01
1.00
µA
ACON Sink Current
VACON = 0.4V
2
mA
THERMISTOR MONITOR (Note 2)
THRM Sense Current for Hot
Qualification
344.1
352.9
361.7
µA
THRM Sense Current for Cold
Qualification
47.58
48.80
50.02
µA
THRM Sense-Voltage Trip Point
(Note 3)
1.386
1.400
1.414
V



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