Datasheet

6 Maxim Integrated
Dual-Input Linear Chargers, Smart Power Selector
with Advanced Battery Temperature Monitoring
MAX8934A–MAX8934E
ELECTRICAL CHARACTERISTICS (continued)
(V
DC
= V
PEN1
= V
PEN2
= 5V, CEN = USUS = THMEN = GND, V
BATT
= 4V, V
THM
= 1.65V, USB, THMSW, CHG, DONE, OT, DOK,
UOK, FLT are unconnected, C
CT
= 0.068FF, T
A
= -40NC to +85NC, unless otherwise noted. Typical values are at T
A
= +25NC.) (Note 1)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Maximum Prequal Time From CEN falling to end of prequal charge, V
BATT
= 2.5V 30 min
Maximum Fast-Charge Time From CEN falling to FLT falling 300 min
Maximum Top-Off Time
MAX8934A/MAX8934C/MAX8934E 15 s
MAX8934B/MAX8934D 60 min
Timer Accuracy -20 +20 %
Timer Extend Threshold
Percentage of fast-charge current below where the timer
clock operates at half-speed
50 %
Timer Suspend Threshold
Percentage of fast-charge current below where timer
clock pauses
20 %
THERMISTOR MONITOR (Beta = 3477) (Note 2)
THM Cold No-Charge Threshold
(T1)
I
CHG
= 0A, when charging is suspended, 2NC hysteresis
-2.2 0 +2.4 NC
73.9 74.4 75.1
% of
THMSW
THM Cold Threshold (T2)
I
CHG
reduced (safety region 1 only), V
BATT_REG
reduced (safety region 2 only), 2NC hysteresis
8 10 12 NC
64.5 65 65.5
% of
THMSW
THM Hot Threshold (T3) V
BATT_REG
reduced (safety region 1), 2.5NC hysteresis
42.8 45 47.5 NC
32.1 32.4 32.8
% of
THMSW
THM Hot No-Charge Threshold
(T4)
I
CHG
= 0mA, when charging is suspended, 3NC
hysteresis
57 60 63.5 NC
22.4 22.7 23
% of
THMSW
THM Hot Overtemperature
Threshold (T
OT
)
OT asserts low, 5NC hysteresis
71 75 80 NC
15.5 15.8 16
% of
THMSW
THERMISTOR MONITOR (Beta = 3964) (Note 3)
THM Cold No-Charge Threshold
(T1)
I
CHG
= 0A, when charging is suspended, 2NC hysteresis
-2.1 0 +2.4 NC
76.4 77.2 77.9
% of
THMSW
THM Cold Threshold (T2)
I
CHG
reduced (safety region 1 only), V
BATT_REG
reduced (safety region 2), 2NC hysteresis
8.2 10 12 NC
66.2 67 67.6
% of
THMSW