Datasheet

bq24272
SLUSB09 –JUNE 2012 www.ti.com
RECOMMENDED OPERATING CONDITIONS
MIN MAX UNITS
IN voltage range 4.2 18
(1)
V
V
IN
IN operating range 4.2 10
I
IN
Input current 2.5 A
I
SYS
Output current from SW, DC 3 A
Charging 2.5
I
BAT
A
Discharging, using internal battery FET 2.5
T
J
Operating junction temperature range 0 125 °C
(1) The inherent switching noise voltage spikes should not exceed the absolute maximum rating on either the BOOT or SW pins. A tight
layout minimizes switching noise.
ELECTRICAL CHARACTERISTICS
Circuit of , V
UVLO
< V
IN
< V
OVP
AND V
IN
>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 UNITS
V
UVLO
< V
IN
< V
OVP
AND V
IN
> V
BAT
+V
SLP
,
15
PWM switching
mA
I
IN
Input quiescent current V
UVLO
< V
IN
< V
OVP
AND V
IN
> V
BAT
+V
SLP
,
5
PWM NOT switching
0°C< T
J
< 85°C, High-Z Mode 175 μA
I
BATLEAK
Leakage current from BAT to the supply 0°C< T
J
< 85°C, V
BAT
= 4.2V, V
IN
= 0V 5 μA
Battery discharge current in high impedance mode, 0°C< T
J
< 85°C, V
BAT
= 4.2 V, V
IN
= 0 V or 5 V, High-Z
I
BAT_HIZ
55 μA
(BAT, SW, SYS) mode
POWER PATH MANAGEMENT
V
SYS(REG)
V
BAT
< V
MINSYS
3.6 3.7 3.82 V
System regulation voltage
V
BATREG
V
BATREG
V
BATREG
V
SYSREGFETOFF
Battery FET turned off, Charge disable or termination
+1.5% +3.0% +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
I
LIM(Discharge)
Current limit, discharge or supplement mode Current monitored in internal FET only 7 A
Measured from
Deglitch Time, OUT short circuit during discharge or
t
DGL(SC1)
(VB
AT
-V
SYS
) = 300 mV to 250 μs
supplement mode
V
BGATE
= (V
BAT
- 600 mV)
Recovery time, OUT short circuit during discharge or
t
REC(SC1)
60 ms
supplement mode
Battery range for BGATE operation 2.5 4.5 V
BATTERY CHARGER
YFF pkg 37 57
Measured from BAT to SYS,
R
ON(BAT-CS+)
Internal battery charger MOSFET on-resistance mΩ
V
BAT
= 4.2V
RGE pkg 50 70
Battery regulation voltage 3.5 4.44 V
V
BATREG
T
A
= 25°C –0.5% 0.5%
Battery regulation voltage accuracy
Over temperature –1% 1%
Charge current programmable range V
BATSHRT
< V
BAT
< V
BATREG
550 2000 mA
I
CHARGE
Fast charge current accuracy 0°C to 125°C –10% 10%
V
BATSHRT
Battery short threshold V
BAT
Rising, 100 mV Hysteresis 2.9 3.0 3.1 V
I
BATSHRT
Battery short current V
BAT
< V
BATSHRT
50.0 mA
t
DGL(BATSHRT)
Deglitch time for battery short to fast charge transition 32 ms
I
CHARGE
= 50 mA –35% 35%
I
TERM
Termination charge current accuracy
I
CHARGE
> 50 mA –15% 15%
Both rising and falling, 2-mV over-drive,
t
DGL(TERM)
Deglitch time for charge termination 32 ms
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
= 100ns 32 ms
During battery detection source cycle 3.3
V
DETECT
Battery detection voltage threshold V
During battery detection sink cycle 3.0
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