Datasheet

bq24270
bq24271
SLUSB10 –JUNE 2012 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
Circuit of Figure 3, V
(UVLO)
< V
(USB)
< V
(OVP)
AND V
(USB)
> V
(BAT)
+V
(SLP)
, T
J
= 0°C–125°C and T
J
= 25°C for typical values
(unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
BATTERY-PACK NTC MONITOR
V
HOT
High temperature threshold V
(TS)
falling 29.7 30 30.5
%V
DRV
V
HOT(HYS)
Hysteresis on high threshold V
(TS)
rising 1
V
WARM
High temperature threshold V
(TS)
falling 37.9 38.3 39.6
%V
DRV
V
WARM(HYS)
Hysteresis on high threshold V
(TS)
rising 1
V
COOL
Low temperature threshold V
(TS)
rising 56 56.5 56.9
%V
DRV
V
COOL(HYS)
Hysteresis on low threshold V
(TS)
falling 1
V
COLD
Low temperature threshold V
(TS)
rising 59.5 60 60.4
%V
DRV
V
COLD(HYS)
Hysteresis on low threshold V
(TS)
falling 1
TS
OFF
TS Disable threshold V
(TS)
rising, 2% V
(DRV
) Hysteresis 70 73 %V
DRV
t
DGL(TS)
Deglitch time on TS change 50 ms
D+/D- Detection (bq24270)
V
D+_SRC
D+ Voltage Source 0.5 0.6 0.7 V
D+ Connection Check Current
I
D+_SRC
7 14 µA
Source
I
D-_SINK
D- Current Sink 50 100 150 µA
D-, switch open –1 1 µA
I
D_LKG
Leakage Current into D+/D-
D+, switch open –1 1 µA
V
D+_LOW
D+ Low Comparator Threshold 0.8 V
V
D-_LOW
D- Low Comparator Threshold 250 400 mV
R
D-_DWN
D- Pulldown for Connection Check 14.25 24.8 kΩ
BATGD Operation
V
BATGD
Good Battery threshold 3.6 3.8 3.9 V
Deglitch for good battery threshold V
(BAT)
rising to HIGH-Z mode, DEFAULT Mode Only 32 ms
I
2
C Compatible Interface
V
IH
Input high threshold level V
(PULL-UP)
= 1.8 V, SDA and SCL 1.3 V
V
IL
Input low threshold level V
(PULL-UP)
= 1.8 V, SDA and SCL 0.4 V
V
OL
Output low threshold level I
L
= 10 mA, sink current 0.4 V
I
BIAS
High-Level leakage current V
(PULL-UP)
= 1.8 V, SDA and SCL 1 µA
t
WATCHDOG
Watchdog Timer timeout 30 s
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