LP3947 Datasheet, PDF (4/14 Pages) National Semiconductor (TI) – USB/AC Adaptor, Single Cell Li-Ion Battery Charger IC

Absolute Maximum Ratings (Notes 1,
2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
CHG-IN
All pins except GND and CHG-IN
(Note 3)
Junction Temperature
Storage Temperature
Power Dissipation (Note 4)
ESD (Note 5)
Human Body Model
Machine Model
−0.3V to +6.5V
−0.3V to +6V
150˚C
−40˚C to +150˚C
1.89W
2 kV
200V
Operating Ratings (Notes 1, 2)
CHG-IN
EN, ISEL, MODE, SCL, SDA,
V_T (Note 3)
Junction Temperature
Operating Temperature
Thermal Resistance θ_JA
Maximum Power Dissipation
(Note 6)
0.3V to 6.5V
0V to 6V
−40˚C to +125˚C
−40˚C to +85˚C
37˚C/W
1.21W
Electrical Characteristics
Unless otherwise noted, V_CHG-IN = 5V, V_BATT = 4V, C_CHG-IN = 1 µF, C_BATT = 10 µF. Typical values and limits appearing in nor-
mal type apply for T_J = 25˚C. Limits appearing in boldface type apply over the entire junction temperature range for operation,
T_J = −40˚C to +85˚C. (Notes 7, 8, 9)
Symbol
Parameter
Conditions
Limit
Typ
Units
Min
Max
V_CC SUPPLY
V_CHG-IN
Input Voltage Range
V_USB
I_CC
Quiescent Current
V_OK-TSHD Adaptor OK Trip Point (CHG-IN)
V_UVLO-TSHD Under Voltage Lock-Out Trip Point
V_OVLO-TSHD Over Voltage Lock-Out Trip Point
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
V_CHG-IN ≤ 4V
EOC = Low, adaptor connected,
V_BATT = 4.1V
V_CHG-IN –V_BATT (Rising)
V_CHG-IN –V_BATT (Falling)
V_CHG-IN (Rising)
V_CHG-IN (Falling)
V_CHG-IN (Rising)
V_CHG-IN (Falling)
(Note 8)
4.5
4.3
2
50
60
50
3.95
3.6
3.75
3.4
5.9
5.7
160
20
6
V
6
20
µA
150
mV
mV
4.3
V
4.1
V
V
˚C
BATTERY CHARGER
I_CHG
Fast Charge Current Range
ISEL = High, In USB Mode
100
ISEL = Low, In USB Mode
500
mA
In AC Adaptor Mode
100
750
Fast Charge Current Accuracy
I_PRE-CHG
I_EOC
Pre-Charge Current
End of Charge Current Accuracy
I_CHARGE = 100 mA or 150 mA
I_CHARGE ≥ 200 mA
V_BATT = 2V
100 mA to 450 mA, 0.1C EOC Only
(Note 10)
−20
+20
mA
−10
+10
%
45
70
mA
−10
+10
mA
500 mA to 750 mA, All EOC Points
−20
+20
%
V_BATT
V_CHG-Q
Battery Regulation Voltage (For 4.1V
Cell)
Battery Regulation Voltage (For 4.2V
Cell)
Full Charge Qualification Threshold
T_J = 0˚C to +85˚C
T_J = −40˚C to +85˚C
T_J = 0˚C to +85˚C
T_J = −40˚C to +85˚C
V_BATT Rising, Transition from
Pre-Charge to Full Current
4.1 4.059
4.141
4.1 4.038
4.162
V
4.1 4.158
4.242
4.2 4.137
4.263
3.0
V
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