MAX8934CETI Ver la hoja de datos (PDF) - Maxim Integrated
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MAX8934CETI
Maxim Integrated
MAX8934CETI Datasheet PDF : 31 Pages
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Dual-Input Linear Chargers, Smart Power Selector
with Advanced Battery Temperature Monitoring
ELECTRICAL CHARACTERISTICS (continued)
(VDC = VPEN1 = VPEN2 = 5V, CEN = USUS = THMEN = GND, VBATT = 4V, VTHM = 1.65V, USB, THMSW, CHG, DONE, OT, DOK,
UOK, FLT are unconnected, CCT = 0.068FF, TA = -40NC to +85NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 1)
PARAMETER
Maximum Prequal Time
Maximum Fast-Charge Time
Maximum Top-Off Time
Timer Accuracy
Timer Extend Threshold
CONDITIONS
MIN
From CEN falling to end of prequal charge, VBATT = 2.5V
From CEN falling to FLT falling
MAX8934A/MAX8934C/MAX8934E
MAX8934B/MAX8934D
-20
Percentage of fast-charge current below where the timer
clock operates at half-speed
TYP MAX UNITS
30
min
300
min
15
s
60
min
+20
%
50
%
Timer Suspend Threshold
Percentage of fast-charge current below where timer
clock pauses
20
%
THERMISTOR MONITOR (Beta = 3477) (Note 2)
-2.2
0
+2.4
NC
THM Cold No-Charge Threshold
(T1)
ICHG = 0A, when charging is suspended, 2NC hysteresis
73.9
74.4
75.1
% of
THMSW
THM Cold Threshold (T2)
ICHG reduced (safety region 1 only), VBATT_REG
reduced (safety region 2 only), 2NC hysteresis
THM Hot Threshold (T3)
VBATT_REG reduced (safety region 1), 2.5NC hysteresis
THM Hot No-Charge Threshold ICHG = 0mA, when charging is suspended, 3NC
(T4)
hysteresis
8
64.5
42.8
32.1
57
22.4
10
65
45
32.4
60
22.7
12
NC
65.5
% of
THMSW
47.5
NC
32.8
% of
THMSW
63.5
NC
23
% of
THMSW
THM Hot Overtemperature
Threshold (TOT)
OT asserts low, 5NC hysteresis
71
75
15.5 15.8
80
NC
16
% of
THMSW
THERMISTOR MONITOR (Beta = 3964) (Note 3)
-2.1
0
+2.4
NC
THM Cold No-Charge Threshold
(T1)
ICHG = 0A, when charging is suspended, 2NC hysteresis
76.4
77.2
77.9
% of
THMSW
THM Cold Threshold (T2)
ICHG reduced (safety region 1 only), VBATT_REG
reduced (safety region 2), 2NC hysteresis
8.2
10
12
NC
66.2
67
67.6
% of
THMSW
6 _______________________________________________________________________________________
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