LM3658 Datasheet, PDF (4/13 Pages) National Semiconductor (TI) – Dual Source USB/AC Li Chemistry Charger IC for Portable Applications

Electrical Characteristics Unless otherwise noted, V_CC (V_{CHG_IN} and/or V_USBpwr) = 5V, V_BATT = 3.5V.
C_{CHG_IN} = 1 µF, C_USBpwr = 1 µF, C_BATT = 1 µF. Typical values and limits appearing in normal type apply for T_J = 25˚C. Limits
appearing in boldface type apply over T_J = 0˚C to +85˚C. (Notes 2, 6, 7) (Continued)
Symbol
Parameter
Conditions
CHARGER
I_CHG
K_ISET
CHG_IN Full Rate
Charge Current
Charge Current Set
Coefficient
I_CHG = K_ISET/R_ISET
(see full-rate charge
R_ISET = 10kΩ
R_ISET = 5 kΩ
R_ISET = 3.3kΩ
6V ≥ V_CC ≥ 4.5V
< V_BATT V_CC – V_{OK_CHG}
< < V_{FULL_RATE} V_BATT V_TERM
mode description)
V_ISET
I_{USB_L}
Charge Current Set
Voltage
USB Full-Rate
Charge Low Current
6V ≥ V_CC ≥ 4.5V
< V_BATT V_CC – V_{OK_CHG}
< < V_{FULL_RATE} V_BATT V_TERM
I_{USB_H}
USB Full-Rate
Charge High Current
I_PREQUAL
Pre-Qualification
Current
V_BATT = 2V, for both AC adapter and USB
V_{FULL_RATE}
Full-Rate
Qualification
Threshold
V_BATT rising, transition from pre-qualification to
full-rate charging
I_EOC
I_TOPOFF
V_RESTART
Full Rate Hysteresis V_BATT falling
End-of-Charge
6V ≥ V_CC ≥ 4.5V
Current, Percent from < V_BATT V_CC – V_{OK_CHG}
Full-Range Current < < V_{FULL_RATE} V_BATT V_TERM
Minimum Top-Off
Charge Current
6V ≥ V_CC ≥ 4.5V
< V_BATT V_CC – V_{OK_CHG}
V_BATT = V_TERM
Restart Threshold V_BATT falling, transition from EOC to
Voltage
pre-qualification mode
V_TL
Battery Temperature
Sense Comparator
Low-Voltage
Threshold
V_TH
Battery Temperature
Sense Comparator
High-Voltage
Threshold
I_TSENSE
Battery Temperature
Sense Current
T_REG
Regulated Junction
Temperature
T_SD
Thermal Shutdown
Temperature
DETECTION AND TIMING
T_POK
Power OK Deglitch
Time
< V_BATT V_CC – V_{OK_CHG}
T_PREQUAL
Pre-Qualification
Timer
Limit
Typ
Units
Min
Max
245
220
270
500
465
535
mA
760
700
820
2500
AΩ
2.5
V
90
80
100
mA
450
400
500
mA
45
35
55
mA
3.0
2.9
3.1
V
60
50
70
mV
9
7
11
%
2.5
1.25
3.75
%
4.0
3.94
4.07
V
0.49
0.46
0.52
V
2.49
2.44
2.54
V
100
94
106
µA
120
˚C
165
˚C
60
40
100
ms
30
27
33
mins
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