Datasheet

bq24270
bq24271
SLUSB10 –JUNE 2012 www.ti.com
ELECTRICAL CHARACTERISTICS
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
V
(UVLO)
< V
(USB)
< V
(OVP)
AND V
(USB)
> V
(BAT)
+ V
(SLP)
PWM switching 15
mA
I
(USB)
Supply current for control V
(UVLO)
< V
(USB)
< V
(OVP)
AND V
(USB)
> V
(BAT)
+V
(SLP)
PWM NOT switching 5
0°C < T
J
< 85°C, High-Z Mode 175 μA
Leakage current from BAT to the
0°C< T
J
< 85°C, V
(BAT)
= 4.2 V, V
(USB)
= 0 V 5 μA
supply
I
(BAT)
0°C< T
J
< 85°C, V
(BAT)
= 4.2 V, V
(USB)
= 5 V or 0 V, SCL, SDA = 0 V or
Battery discharge current in High
1.8 V,
55 μA
Impedance mode (BAT, SW, SYS)
High-Z Mode
POWER PATH MANAGEMENT
V
(BAT)
< V
(MINSYS)
3.6 3.7 3.82
V
SYS(REG)
System regulation voltage V
V
BATREG
+ V
BATREG
+ V
BATREG
+
Battery FET turned off
1.5% 3% 4.17%
V
(MINSYS)
Minimum system regulation voltage V
(BAT)
< V
(MINSYS)
, Input current limit or V
(INDPM)
active 3.4 3.5 3.62 V
V
BAT
–
V
(BSUP1)
Enter supplement mode threshold V
(BAT)
> 2.5 V V
30mV
V
BAT
–
V
(BSUP2)
Exit supplement mode threshold V
(BAT)
> 2.5 V V
10mV
Current limit, discharge or
I
LIM
Current monitored in internal FET only 7 A
supplement mode
Deglitch time, SYS short circuit
Measured from (V
(BAT)
– V
(SYS)
) = 300 mV to
t
DGL(SC1)
during discharge or supplement 250 μs
BAT = high-impedance
mode
Recovery time, SYS short circuit
t
REC(SC1)
during discharge or supplement 60 ms
mode
Battery range for BGATE and
2.5 4.5 V
supplement mode operation
BATTERY CHARGER
YFF pkg 37 57
Measured from BAT to SYS,
Internal battery charger MOSFET
R
ON(BAT-SYS)
mΩ
on-resistance
V
(BAT)
= 4.2 V
RGE pkg 50 70
Charge voltage Operating in voltage regulation, Programmable Range 3.5 4.44
V
(BATREG)
T
A
= 25°C -0.5% .5% V
Voltage regulation accuracy
-1% 1%
Fast charge current range V
(BATHSRT)
≤ V
(BAT)
< V
BAT(REG)
programmable range 550 1500 mA
I
(CHARGE)
Fast charge current accuracy 0°C to 125°C -10% 10%
V
(BATSHRT)
Battery short circuit threshold 100 mV hysteresis 2.9 3 3.1 V
I
(BATSHRT)
Battery short circuit current V
(BAT)
< V
(BATSHRT)
50.0 mA
Deglitch time for battery short to
t
DGL(BATSHRT)
32 ms
fast charge transition
I
(TERM)
= 50 mA -35% 35%
I
TERM
Termination charge current
I
(TERM)
≥ 100 mA -15% 15%
Both rising and falling, 2-mV over-drive,
Deglitch time for charge
t
DGL(TERM)
32 ms
termination
t
RISE
, t
FALL
= 100 ns
V
(RCH)
Recharge threshold voltage Below V
(BATREG)
120 mV
t
DGL(RCH)
Deglitch time V
(BAT)
falling below V
(RCH)
, t
FALL
= 100 ns 32 ms
During battery detection source cycle 3.3
V
(DETECT)
Battery detection voltage V
During battery detection sink cycle 3
Battery detection current before
I
(DETECT)
Termination enabled (EN_TERM = 1) 2.5 mA
charge done (sink current)
t
(DETECT)
Battery detection time Termination enabled (EN_TERM = 1) 250 ms
V
IH
PSEL, CD input high logic level 1.3 V
V
IL
PSEL, CD input low logic level 0.4 V
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