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bq24278YFFT Datasheet(PDF) 5 Page - Texas Instruments

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Part # bq24278YFFT
Description  2.5A, Single Input, Single Cell Switchmode Li-Ion BATTERY CHARGER with Power Path Management
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

bq24278YFFT Datasheet(HTML) 5 Page - Texas Instruments

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SLUSB04 – JUNE 2012
ELECTRICAL CHARACTERISTICS (continued)
Circuit of Figure 2, VUVLO < VIN < VOVP AND VIN>VBAT+VSLP, TJ = 0°C–125°C and TJ = 25°C for typical values (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
PWM CONVERTER
Internal top reverse blocking MOSFET on-resistance
IIN_LIMIT = 500 mA, Measured from VIN to PMIDU
95
175
m
Ω
Internal top N-channel Switching MOSFET on-resistance
Measured from PMIDU to SW
100
175
m
Ω
Internal bottom N-channel MOSFET on-resistance
Measured from SW to PGND
65
115
m
Ω
fOSC
Oscillator frequency
1.35
1.50
1.65
MHz
DMAX
Maximum duty cycle
95%
DMIN
Minimum duty cycle
0
BATTERY-PACK NTC MONITOR
VHOT
High temperature threshold
VTS falling
29.7
30
30.5
VHYS(HOT)
Hysteresis on high threshold
VTS rising
1
VCOLD
Low temperature threshold
VTS rising
59.5
60
60.4
VWARM
Warm temperature threshold
VTS falling
37.9
38.3
39.6
VHYS(WARM)
Hysteresis on warm threshold
VTS rising
1
%VDRV
VCOOL
Cool temperature threshold
VTS rising
56.0
56.5
56.9
VHYS(COOL)
Hysteresis on cool threshold
VTS falling
1
VHYS(COLD)
Hysteresis on low threshold
VTS falling
1
TSOFF
TS Disable threshold
VTS rising, 2% VDRV Hysteresis
70
73
tDGL(TS)
Deglitch time on TS change
50
ms
Copyright © 2012, Texas Instruments Incorporated
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