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| BQ24257 Datasheet, PDF (7/45 Pages) Texas Instruments – 2A Single Input I2C, Standalone Switch-Mode Li-Ion Battery Charger with Integrated Current Sense Resistor | |||
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www.ti.com
bq24257
bq24258
SLUSBG0B â FEBRUARY 2013 â REVISED JULY 2013
ELECTRICAL CHARACTERISTICS (continued)
bq24257 App Circuit, VUVLO < VIN < VOVP AND VIN > VBAT+VSLP, TJ = 0°C â 125°C and TJ = 25°C for typical values (unless
otherwise noted)
tDGL(OVP)
PARAMETER
Deglitch time for IN Rising above
VOVP
VBOVP
Battery OVP threshold voltage
VBATOVP hysteresis
tDGL(BOVP)
BOVP Deglitch
PWM CONVERTER
RON(BLK)
Internal blocking MOSFET on-
resistance
RON(HS)
Internal high-side MOSFET on-
resistance
RON(LS)
Internal low-side MOSFET on-
resistance
ICbC
fOSC
DMAX
DMIN
TSHTDWN
Cycle-by-cycle current limit
Oscillator frequency
Maximum duty cycle
Minimum duty cycle
Thermal trip
Thermal hysteresis
TREG
LDO
Thermal regulation threshold
VLDO
LDO Output Voltage
ILDO
Maximum LDO Output Current
VLDO
LDO Dropout Voltage (VIN â VLDO)
BATTERY-PACK NTC MONITOR
VHOT
VHYS(HOT)
VWARM
VHYS(WARM)
High temperature threshold
Hysteresis on high threshold
Warm temperature threshold
Hysteresis on warm temperature
threshold
VCOOL
VHSY(COOL)
Cool temperature threshold
Hysteresis on cool temperature
threshold
VCOLD
Low temperature threshold
VHYS(COLD)
Hysteresis on low threshold
VTS_DIS
TS disable threshold
tDGL(TS)
Deglitch time on TS change
INPUTS (DBP, EN1, EN2, EN3, CE, SCL, SDA)
VIH
Input high threshold
VIL
Input low threshold
STATUS OUTPUTS (STAT, PG, CHG)
VOL
IIH
TIMERS
Low-level output saturation voltage
High-level leakage current
tSAFETY
45 min safety timer
6 hr safety timer
9 hr safety timer
tWATCH-DOG
Watch dog timer
TEST CONDITIONS
IN rising voltage, tRISE = 100ns
VBAT threshold over VBATREG to turn off
charger during charge
Lower limit for VBAT falling from above
VBOVP
Battery entering/exiting BOVP
Measured from IN to PMID (WCSP and
QFN)
Measured from IN to SW (WCSP and
QFN)
Measured from SW to PGND (WCSP and
QFN)
VSYS shorted
Charge current begins to cut off
VIN = 5.5V, ILDO = 0 to 50 mA
VIN = 5 V, ILDO = 50 mA
VTS falling
VTS rising
VTS falling
VTS rising
VTS rising
VTS falling
VTS rising
VTS falling
IO = 5 mA, sink current
Hi-Z and 5 V applies
MIN
102.5
2.6
2.7
0%
4.65
50
29.6
37.9
56.5
59.6
70
1
TYP
32
105
1
1
60
100
110
3.2
3
95%
150
10
125
4.85
200
30
1
38.3
1
56.5
1
60
1
32
2700
21600
32400
50
MAX
UNIT
ms
107.5 % VBATREG
ms
100 mΩ
150 mΩ
165 mΩ
3.8
A
3.3 MHz
°C
5.04
V
mA
300 mV
30.4
%VLDO
38.7
%VLDO
56.9
%VLDO
60.4
%VLDO
73 %VLDO
ms
V
0.4
V
0.4
V
1
uA
s
s
s
s
Copyright © 2013, Texas Instruments Incorporated
Product Folder Links: bq24257 bq24258
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