Datasheet

Charge
Pump
IN OUT
OUTREG
REF
T C
J
o
T
J
°C
125
ThermalRegulation
°C
REF
IN
IN
ISET
Charge
Pump
PRE-TERM
75 Am
+
CHARGE
CONTROL
OUT
V
TERM_EN
ISET2(LOW=ISET,HI=USB500,
FLOAT =USB100)
V
COLD-FLT
V
HOT-45C
V
TTDM
TS
5 Am 45 Am
V
CLAMP
= 1.4 V
ColdTemperature
SinkCurrent
= 45 Am
LO=TTDM MODE
HI = CHIP DISABLE
OUT
CHG
ON:
OnDuring
1stChargeOnly
OFF:
+
Increasedfrom 75 A to85 A form m
1
st
minuteofcharge.
+
_
+
_
+
_
+
_
+
_
+
_
+
_
+
_
+
_
+
_
+
_
+
_
InternalCharge
CurrentSense
w/MultipleOutputs
+
_
USBSense
Resistor
USB100/500
REF
+
_
1.5 V
FASTCHARGE
PRE-CHARGE
PG
HI = SuspendCHG
V
COLD-10C
V
HOT-FLT
+
_
+
_
HI =HalfCHG(JEITA)
HI =4.06Vreg(JEITA)
V
DISABLE
D+/ D-
DETECTION
CONTROL
- OnInitial
SupplyPower
Connection
D+
D-
0.6 V(200 mA)
(100 mA)
bq24055Only
+
-
80
mV
OUT
Input
Power
I x1.5V
540 A
OUT
W
+
_
IN-DPM
REF
150 C
ThermalShutdown
o
REF
0.9 VFloat
+
_
Disable
SinkCurrent
= 20 Am
X2 Gain (1:2)
Term:Pre-CHG
TermReference
Pre-CHGReference
Detect
IN
+
_
OVP
REF
bq24050
bq24052
bq24055
SLUS940B –SEPTEMBER 2009–REVISED JUNE 2012 www.ti.com
FUNCTIONAL BLOCK DIAGRAM
10 Copyright © 2009–2012, Texas Instruments Incorporated