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MAX8939EWVT Datasheet(PDF) 4 Page - Maxim Integrated Products

Part # MAX8939EWVT
Description  System Power Management for Mobile Handset Hardware Input Enable
PDF  43 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX8939EWVT Datasheet(HTML) 4 Page - Maxim Integrated Products

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4 ______________________________________________________________________________________
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_MON
I/V Conversion Factor
Monitoring voltage to charge current - fast-charge
current = 450mA (Note 3)
2.666
mV/mA
I/V Accuracy
Overall range
-10
+10
%
Output Voltage
450mA charge current - fast-charge current = 450mA
(Note 3)
1200
mV
Charge Monitoring Range
0
1.2
V
Output Impedance
10
20
40
kI
INDICATOR LED
LED3 Current Sink
VCHG_IN = 5V, TA = 0NC to +85NC
1.5
3
5
mA
BATT
BATT Regulation Voltage
IBATT = 90mA,
VBATT programmed to 4.2V
TA = +25NC
4.179
4.2
4.221
V
TA = -40NC to +85NC
4.158
4.2
4.242
Programmable Restart Fast-Charge
Threshold
From BATT regulation voltage, default = disable
-200
-300
-400
Disable
mV
CHG_IN Fast-Charge Current
(Note 4)
VBATT = 3.5V
CHG_CONTROL_A.FAST_CHARGE = 000b
80
90
100
mA
001b
240
270
300
010b
400
450
500
011b
560
630
700
100b
630
765
900
101b
700
850
1000
110b
940
1020
1200
111b
1050
1275
1500
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, default value = 0%
0
10
20
%
TIMER
Timer Accuracy
-20
+20
%
Fast-Charge Time Limit
From entering fast-charge to VBATT < 4.2V, default value
60
min
Precharge Timer
30
min
Top-Off Timer
30
60
120
Disable
min
Watchdog Timer
2.5
5
10
s



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