Datasheet

C
VREF
10 nF
C
BOOT
+
PACK
-
PACK
+
C
AUXPWR
SCL
SDA
CSOUT
CSIN
PGND
SW
I
2
CBUS
VAUX
HOST
SCL
SDA
STAT
VREF
STAT
PMID
VBUS
C
IN
V
BUS
C
IN
BOOT
ISEL
U1
AUXPWR
ISEL
C
O
R
SNS
C
CSIN
V
BAT
1 Fm
4.7 Fm
10kW
10kW
10kW
10kW
10kW
L 1.0 H
O
m
68mW
10 Fm
0.1 Fm
1 Fm
1 Fm
bq24155
SGND
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SLUS942 –FEBRUARY 2010 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
Circuit of Figure 1, VBUS = 5 V, HZ_MODE = 0, OPA_MODE = 0 (charger mode operation), T
J
= 0°C to 125°C, T
J
= 25°C for
typical values (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Cycle-by-cycle current limit for
I
(LIMIT)
Charge mode operation 1.5 2.3 3 A
charge
Short-circuit voltage threshold V
(AUXPWR)
falling 1.9 2 2.1 V
V
(SHORT)
V
(SHORT)
hysteresis V
(AUXPWR)
rising from below V
(SHORT)
100 mV
I
(SHORT)
Short-circuit current V
(AUXPWR)
≤ V
(SHORT)
5 10 15 mA
PROTECTION
T
(SHTDWN)
Thermal trip 165
Thermal hysteresis 10 °C
T
(CF)
Thermal regulation threshold
(3)
Charge current begins to reduce 120
Time constant for the 32 second
T
(32S)
32 Second mode 12 32 s
timer
(3) Verified by design
TYPICAL APPLICATION CIRCUITS
VBUS = 5 V, I
(CHARGE)
= 1250 mA, VBAT = 3.5 V to 4.44 V (adjustable), Safety Timer = 32 minutes or 32
seconds.
Figure 1. I
2
C Controlled 1-Cell Charger Application Circuit
VBUS = 5 V, I
(IN_LIMIT)
= 500 mA, V
OUT
= 3.5 V to 4.44 V (adjustable), Safety Timer = 32 minutes or 32 seconds.
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