BQ24050 Datasheet, PDF (10/37 Pages) Texas Instruments – 800mA Single Cell Li-Ion Battery Charger With Automatic Adaptor/USB Detection

bq24050
bq24052
bq24055
SLUS940A – SEPTEMBER 2009 – REVISED SEPTEMBER 2009.................................................................................................................................... www.ti.com
FUNCTIONAL BLOCK DIAGRAM
IN
I_OUT x 1.5 V
540 AW
ISET
Internal Charge
Current Sense
w/Multiple Outputs
+
-
OUT
80 Input
mV Power
+ ^Detect
_
Charge
Pump
IN
+
_
IN-DPM_REF
FAST CHARGE
PRE-CHARGE
IN
1.5 V
Pre-CHG Reference
OUT
OUT
OUTREG_REF
TJ°C
125°C_REF
Thermal Regulation
USB Sense
Resistor
Term Reference
+
_
75mA⁺
PRE-TERM
+_{Increased from 75mA to 85mA for}
1^st minute of charge.
+
_
OUT
+
VTERM_EN
_
ISET2 (LOW = ISET, HI = USB500, _{0.9 V Float}
FLOAT = USB100)
VCOLD-10 C
HI = Half CHG (JEITA)
T_J^oC
150^oC_REF
Thermal Shutdown
X2 Gain (1:2)
Term :Pre-CHG
IN
OVP_REF
USB100/500_REF
Charge
Pump
CHG
CHARGE
CONTROL
ON:
OFF:
On During
1st Charge Only
PG
bq24055 Only
VHOT-45C
VCOLD-FLT
HI = 4.06Vreg (JEITA)
VHOT-FLT
TS
VTTDM
+
_
LO = TTDM MODE
HI = Suspend CHG
0.6 V(200 mA)
D+ / D-
DETECTION
CONTROL
- On Initial
Supply Power
Connection
D+
D-
(100 mA)
VDISABLE
5mA
+
HI = CHIP DISABLE
_
Cold Temperature
Disable
Sink Current
Sink Current
= 45mA
VCLAMP = 1.4 V
+
= 20mA
+
_
_
45mA
10
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