LP3925 Datasheet, PDF (21/51 Pages) Texas Instruments – High Performance Power Management Unit for Handset Applications

CHARGER ELECTRICAL CHARACTERISTICS
Typical values and limits appearing in normal type apply for T_J = 25°C. Limits appearing in boldface type apply over the entire
junction temperature range for operation, T_J =−25°C to +85°C. Unless otherwise specified, the following applies for V_{VIN_CHG} =
5.0V.(Note 6, Note 9)
Symbol
Parameter
Conditions
Limit
Typ
Units
Min
Max
V_OV
Over-Voltage Protection
threshold
Charger input is turned off if voltage is _6.95
above this threshold.
6.55
7.4
V
V_{VIN_CHG}
AC input voltage operating
range
4.5
6.5
V
V_{OK_CHG}
VIN_CHG OK trip-point
V_{VIN_CHG} - V_BATT (Rising)
V_{VIN_CHG} - V_BATT (Falling)
300
90
mV
V_TERM
V_TERM voltage tolerance
default
V_TERM = 4.2V, I_CHG = 50 mA
V_TERM is measured at 10% of the
programmed I_CHG current
−0.35
+0.35
%
−1
+1
I_CHG
Programmable full-rate
charge current
6.5V ≥ V_{VIN_CHG} ≥ 4.5V
V _BATT < V_{VIN_CHG} − V_{OK_VIN_CHG}
V _{FULL_RATE} < V_BATT < V_TERM (Note
10)
I_CHG = 100 mA (Note 7)
100
50
1200
mA
75
125
Full-rate charge current
tolerance
I_CHG = 400 mA (Note 7)
I_CHG = 600 mA
400
350
450
mA
600
540
660
I_CHG = 1100 mA (Note 7)
1100
1040
1160
I_PRECHG
Pre-charge current
2.2V < V_BATT < V_{FULL_RATE}
50
35
65
mA
I_DCIN
Input current limit
IDCIN = 435 mA; IBATT = 200 mA
−9
5
%
I_{VIN_CHG_MAX}
Maximum input current in
high-current mode
V_{VIN_CHG} – V_DD ≤ 0.8V (Note 7)
2.3
A
V_{FULL_RATE}
Full-rate qualification
threshold
V_BATT rising, transition from pre-
charge to full-rate charging
(2.8V option selected)
2.8
2.7
2.9
V
V_RESTART
Restart threshold voltage ^{From VTERM voltage (4.2V, −150 mV}
−150
−180
−120
mV
options selected)
T_REG
Regulated junction
115°C option selected (Note 7)
115
°C
temperature
DETECTION AND TIMING (Note 7)
T_POK
Power OK deglitch time
V_CHG > V_BATT + V_{OK_CHG}
30
ms
T_{PQ_FULL}
Deglitch time
Pre-charge to full-rate charge
transition
210
ms
T_CHG
Charge timer
Pre-charge mode (default setting)
45
CC mode/CV mode (default setting).
5
mins
Hrs
T_EOC
Deglitch time for end-of-
charge transition
210
ms
21
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