LP3910SQ-AN Datasheet, PDF (7/60 Pages) National Semiconductor (TI) – Power Management IC for Hard Drive Based Portable Media Players

Symbol
Parameter
Conditions
Min
Typ
Max
Units
t_SU
Set-Up Time for STOP Condition
(Note 9)
0.6
µs
t_TRANS
Maximum Pulse Width of Spikes That Must Be (Note 9)
Suppressed by the Input Filter of Both Data and
50
µs
CLK Signals.
Li-Ion Battery Charger Electrical Characteristics
Unless otherwise noted, VDD = 5.0V, VBATT = 3.6V, C_BATT = 4.7 µF, C_{CHG_DET} = 10 µF, R_IREF = 121 kΩ. 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 = 0°C to +125°C. (Notes 2, 6, 7, 8, 10)
Symbol
Parameter
Conditions
Min
Typ
Max Units
V_USB
V_{USB_HYST}
CHG_DET
V_{CHG_HYST}
I_{USB_SUSP}
Minimum External USB Supply Soltage
USBPWR Detect Hysteresis
Minimum External Adapter Supply
Voltage Range
CHG_DET Input Hysteresis
Quiescent Current in USB Suspend
Mode
USB Current Limit = 500 mA
Adapter Current Limit = 1A
V_FWD Schottky = 350 mV
USB Suspend Mode,
V_USB = 5.0V
USBSUSP = USBPWR
USBISEL = 0V
4.15
4.25
4.35
V
110
mV
4.4
4.5
4.6
V
150
mV
30
60
µA
V_{TERM_TOL}
I_{CHG_WA}
I_{CHG_USB}
Battery Charge Termination Voltage
Tolerance
Full-rate Charging Current from Wall
Adapter Input (See Full-rate Charging
Mode Description)
Full-rate Charging Current from
USBPWR Input (See Full-rate Charging
Mode Description)
T_A = 25°C,
I_PROG = 500 mA
I_CHG = 50 mA
T_A = 0°C to 125°C,
I_PROG = 500 mA,
I_CHG = 50 mA
CHG_DET = 5.25V
V_BATT = 3.6V
I_PROG = 500 mA
USB = 5V
V_BATT = 3.6V
I_PROG = 500 mA
USB_ISEL = 800 mA
-0.35 4.2V +0.35
−0.5
4.1V
+0.5
−0.5 4.38V +0.5
%
−1
4.2V
+1
−1.5
4.1V
+1.5
−1.5 4.38V +1.5
450
500
550
mA
450
500
550
mA
USB = 5V
V_BATT = 3.6V
I_PROG = 500 mA
USB_ISEL = 500 mA
405
450
495
mA
USB I_LIMIT
USB_ISEL = 100 mA
USB_ISEL= 500 mA
USB_ISEL = 800 mA
90
95
100
450
475
500
mA
720
760
800
I_PREQUAL
Pre-qualification Current
V_BATT = 2.5V, Wall Adapter Charge
%
Current.
8
Percentage of Programmed Full
10
12
Rate Current.
VBATT = 2.5V, USB Charge
Current
40
50
60
mA
V_{FULL_RATE} Full-rate Qualification Threshold
V_BATT Rising, Transition from Pre- _2.75
2.85
2.95
V
Qualification to Full-rate Charging
V_{TH_H}
V_{TH_L}
Upper T_S Comparator Limit
Lower T_S Comparator Limit
45°C CHSPV Reg D3 = 0
50°C CHSPV Reg D3 = 1
1.955 1.995 2.035
V
0.345 0.365 0.385
V
0.290 0.310 0.330
7
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