Datasheet

K
ILIM
I
INLIM
R
ILIM
=
K
ISET
I
CHARGE
R
ISET
=
bq24278
SLUSB04 –JUNE 2012 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
Circuit of Figure 2, VU
VLO
< 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 UNIT
BATTERY CHARGER
YFF pkg 37 57
Measured from BAT to SYS,
R
ON(BAT-SYS)
Internal battery charger MOSFET on-resistance mΩ
V
BAT
= 4.2 V
RGE pkg 50 70
T
A
= 25°C 4.179 4.2 4.221
V
WARM
< V
TS
< V
COOL
4.160 4.2 4.24
V
BATREG
Battery regulation voltage V
T
A
= 25°C 4.04 4.06 4.08
V
HOT
< V
TS
< V
WARM
4.02 4.06 4.1
I
CHARGE
Charge current programmable range 550 2500 mA
T
A
= 0°C to 125°C, V
WARM
< V
TS
< V
COOL
400 490 560
K
ISET
Programmable fast charge current factor AΩ
T
A
= 0°C to 125°C, V
COLD
< V
TS
< V
COOL
225 245 270
V
BATSHRT
Battery short threshold V
BAT
Rising 2.9 3.0 3.1 V
V
BATSHRThys
Battery short threshold hysteresis V
BAT
Falling 100 mV
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
≤ 1A 7 10 11.5
I
TERM
Termination charge current %I
CHARGE
I
CHARGE
>1A 8 10 11
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
= 100 ns 32 ms
I
DETECT
Battery detection current before charge done (sink current) 2.5 mA
t
DETECT
Battery detection time 250 ms
INPUT PROTECTION
Maximum input current limit programmable range for IN
I
INLIM
1000 2500 mA
input
K
ILIM
Maximum input current factor for IN input 238 251 264 AΩ
V
IN_DPM_IN
VIN_DPM threshold programmable range for IN Input 4.2 10 V
VDPM threshold 1.18 1.2 1.22 V
V
DRV
Internal bias regulator voltage 5 5.2 5.45 V
I
DRV
DRV Output current 10 mA
V
DO_DRV
DRV Dropout voltage (V
IN
– V
DRV
) I
IN
= 1A, V
IN
= 5 V, I
DRV
= 10 mA 450 mV
V
UVLO
IC active threshold voltage V
IN
rising 3.6 3.8 4.0 V
V
UVLO_HYS
IC active hysteresis V
IN
falling from above V
UVLO
150 mV
V
SLP
Sleep-mode entry threshold, V
IN
-V
BAT
2.0 V ≤ V
BAT
≤ V
OREG
, V
IN
falling 0 40 100 mV
V
SLP_EXIT
Sleep-mode exit hysteresis 2.0 V ≤ V
BAT
≤ V
OREG
40 100 160 mV
Deglitch time for supply rising above V
SLP
+V
SLP_EXIT
Rising voltage, 2-mV over drive, t
RISE
= 100 ns 30 ms
V
OVP
Input supply OVP threshold voltage IN, V
IN
Rising 10.3 10.5 10.7 V
V
OVP(HYS)
V
OVP
hysteresis Supply falling from V
OVP
100 mV
V
BAT
threshold over V
OREG
to turn off charger during 1.025 × 1.05 × 1.075 ×
V
BOVP
Battery OVP threshold voltage V
charge V
BATREG
V
BATREG
V
BATREG
% of
VB
OVP
hysteresis Lower limit for V
BAT
falling from above V
BOVP
1
V
BATREG
V
BATUVLO
Battery UVLO threshold voltage 2.5 V
I
LIMIT
Cycle by Cycle current limit 4.1 4.9 5.6 A
T
SHUTDWN
Thermal shutdown 10C Hysteresis 165 C
T
REG
Thermal regulation threshold 120 C
Safety Timer 324 360 396 min
CE, CD, PG, CHG
V
IH
Input high threshold 1.3 V
V
IL
Input low threshold 0.4 V
I
IH
High-level leakage current V
CHG
= V
PG
= 5 V 1 µA
V
OL
Low-level output saturation voltage I
O
= 10 mA, sink current 0.4 V
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