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MAX8939 Datasheet(PDF) 5 Page - Maxim Integrated Products

Part # MAX8939
Description  System Power Management for Mobile Handset
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX8939 Datasheet(HTML) 5 Page - Maxim Integrated Products

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_______________________________________________________________________________________ 5
System Power Management
for Mobile Handset
ELECTRICAL CHARACTERISTICS (continued)
(VBATT = 3.7V, VCHG_IN = 5.0V, circuit of Figure 1, TA = -40NC to +85NC, unless otherwise noted. Typical values are at TA = +25NC.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
CHG_IN Fast-Charge Current
(MAX8939A) (Note 4)
VBATT = 3.5V
CHG_CONTROL_A.FAST_CHARGE = 000b
82
90
98
mA
001b
250
270
290
010b
420
450
480
011b
575
630
685
100b
695
765
835
101b
775
850
925
110b
100
120
140
111b
160
180
200
CHG_IN Precharge Current
VBATT = 2V
90
100
mA
BATT Prequalification Threshold
Voltage
VBATT rising hysteresis 140mV (typ)
2.5
2.55
2.6
V
Soft-Start Time
Ramp time to fast-charge current
2.5
ms
TOP-OFF
Top-Off Threshold
(% of Fast-Charge Current)
IBATT falling
TOP_OFF = 00b
10
%
TOP_OFF = 01b
20
TOP_OFF = 10b
30
TOP_OFF = 11b (default)
0
TIMER
Timer Accuracy
-20
+20
%
Fast-Charge Time Limit
From entering fast-
charge to VBATT
< 4.2V
MAX8939
CCTR = 00b (default)
60
min
CCTR = 01b
120
CCTR = 10b
240
MAX8939A
CCTR = 00b (default)
24
CCTR = 01b
120
CCTR = 10b
240
Precharge Timer
MAX8939
30
min
MAX8939A
12
Top-Off Timer
TOPOFF_TIME = 00b
30
min
TOPOFF_TIME = 01b
60
TOPOFF_TIME = 10b
120
TOPOFF_TIME = 11b
Disable
Watchdog Timer
MAX8939
2.5
5
10
s
MAX8939A
15
30
45
THERMAL LOOP
Thermal Limit Temperature
Junction temperature
when the charge current is
reduced, TJ rising, default
value
+70NC [00]
+100
N
C
+85NC [01]
+100NC [10]
+115NC [11]


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