LP3910 Datasheet, PDF (9/72 Pages) Texas Instruments – Power Management IC for Hard-Drive-Based Portable Media Players

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LP3910
SNVS481M – NOVEMBER 2006 – REVISED DECEMBER 2015
7.7 Electrical Characteristics: Li-Ion Battery Charger
Unless otherwise noted, V_DD = 5 V, V_BATT = 3.6 V, C_BATT = 4.7 µF, C_{CHG_DET} = 10 µF, R_IREF = 121 kΩ. Typical limits apply for
T_J = 25°C; minimum and maximum limits apply for T_J = 0°C to 125°C, unless otherwise specified.^(1)(2)(3)(4)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
V_USB
Minimum external USB
supply voltage
T_J = 25°C
USB current limit = 500 mA
4.15
4.25
4.35
V
V_{USB_HYST}
USBPWR detect
hysteresis
110
mV
CHG_DET
V_{CHG_HYST}
Minimum external adapter
supply voltage range
CHG_DET input
hysteresis
T_J = 25°C
Adapter current limit = 1 A
V_FWD Schottky = 350 mV
4.4
4.5
150
4.6
V
mV
I_{USB_SUSP}
Quiescent current in USB
suspend mode
USB suspend mode, V_USB = 5 V
USBSUSP = USBPWR
USBISEL = 0 V
30
60
µA
V_{TERM_TOL}
Battery charge termination
voltage tolerance
(selected in CHCTL
Register (01)H Charger
Control Register)
T_J = 25°C
I_PROG = 500 mA, I_CHG = 50 mA
T_J = 0°C to 125°C
I_PROG = 500 mA, I_CHG = 50 mA
–0.35%
−0.5%
−0.5%
–1%
–1.5%
–1.5%
4.2
0.35%
4.1
0.5%
V
4.38
0.5%
4.2
1%
4.1
1.5%
V
4.38
1.5%
I_{CHG_WA}
Full-rate charging current
from wall adapter input
(see Full-Rate Charging
Mode)
CHG_DET = 5.25 V
V_BATT = 3.6 V, I_PROG = 500 mA
450
500
550 mA
I_{CHG_USB}
Full-rate charging current
from usbpwr input (see
Full-Rate Charging Mode)
USB = 5 V, V_BATT = 3.6 V
I_PROG = 500 mA, USB_ISEL = 800 mA
USB = 5 V, V_BATT = 3.6 V
I_PROG = 500 mA, USB_ISEL = 500 mA
USB_ISEL = 100 mA
450
500
405
450
90
95
550 mA
495 mA
100
USB I_LIMIT
USB charge-current limit USB_ISEL = 500 mA
USB_ISEL = 800 mA
450
475
720
760
500 mA
800
I_PREQUAL
Pre-qualification current
V_BATT = 2.5 V, wall-adapter charge
current
Percentage of programmed full-rate
current
8%
10%
12%
V_{FULL_RATE}
Full-rate qualification
threshold
V_BATT = 2.5 V, USB charge current
V_BATT rising, transition from pre-
qualification to full-rate charging
(standard)
V_BATT rising, transition from pre-
qualification to full-rate charging (AP
version only)
40
50
2.75
2.85
2.45
2.55
60 mA
2.95
V
2.65
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
2.82
0.315
0.255
2.87
0.33
0.27
2.93
V
0.345
V
0.285
I_TSENSE
Battery temperature sense
current
7.75
8
8.25
µA
T_REG
Regulated charger
junction temperature
T_J = 25°C
105
115
125
°C
(1) All voltages are with respect to the potential at the GND pin.
(2) Junction-to-ambient thermal resistance is highly application and board-layout dependent. In applications where high maximum power
dissipation exists, special care must be paid to thermal dissipation issues in board design.
(3) Minimum and maximum limits are specified by design, test, or statistical analysis. Typical numbers are not ensured, but do represent the
most likely norm.
(4) Low ESR Surface-Mount Ceramic Capacitors (MLCCs) are used in setting electrical characteristics.
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