BQ24140_14 Datasheet, PDF (7/39 Pages) Texas Instruments – Integrated Dual-Input Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance and USB-OTG Support

bq24140
www.ti.com
SLUSAO5 – OCTOBER 2011
ELECTRICAL CHARACTERISTICS (continued)
Circuit of Figure 1, V_BUS = 5V, HZ_MODE=0, OPA_MODE=0, CD=0, T_J = –40°C–125°C and T_J = 25°C for typical values
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
BOOST MODE OPERATION FOR V_BUS (OPA_MODE=1, HZ_MODE=0, VBUS input only)
V_{BUS_BOOST} Boost output voltage (to VBUS pin)
2.5 V < V_VBAT < 4.5 V
Boost output voltage accuracy
Including line and load regulation
5.05
V
-3%
+3%
I_BOOST
I_BLIMIT
V_BUSOVP
Maximum output current for boost
Cycle by cycle current limit for boost
Over voltage protection threshold for
boost (VBUS pin)
V_BUS = 5.05 V, 2.5 V < V_VBAT < 4.5 V
V_BUS = 5.05 V, 2.5 V < V_VBAT < 4.5 V
Threshold over V_BUS to turn off converter during boost
650
mA
1.0
A
5.8
6.0 6.2
V
V_BATMAX
V_BUSOVP hysteresis
V_BUS falling from above V_BUSOVP
Maximum battery voltage for boost (VBAT
pin)
V_VBAT rising edge during boost
162
mV
4.65 4.75 4.85
V
V_BATMIN
V_BATMAX hysteresis
Minimum battery voltage for boost (VBAT
pin)
V_VBAT falling from above V_BATMAX
During boosting
Before boost starts
70
mV
2.3
V
2.8 2.97
Boost output resistance at
high-impedance mode (From VBUS to
PGND)
CD = 1 or HZ_MODE = 1
500
kΩ
ICC_BOOS Operation quiescent current in boost
T
mode
No load at VBUS, power save mode, V_VBAT = 4 V, boosting
650
µA
PROTECTION
T_SHTDWN
Thermal trip
Thermal hysteresis
165
°C
10
°C
T_CF
T_32S
T_15M
VREG
Thermal regulation threshold
Time constant for the 32-second timer
Time constant for the 15-minute timer
Charge current begins to taper down
32 second mode
15 minute mode
120
°C
15
32
S
12
15 Minute
V_REG
I_{LIM VREG}
VREG Regulator
Current limit VREG
I_LOAD = 1mA, CREG = 0.1µF, VIN > V_UVLO
VREG = 0V
2.34
2.6 2.86
V
10
mA
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