BQ24090_12 Datasheet, PDF (9/34 Pages) Texas Instruments – 1A, Single-Input, Single Cell Li-Ion and Li-Pol Battery Charger

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FUNCTIONAL BLOCK DIAGRAM
Internal Charge
Current Sense
w/ Multiple Outputs
IN
+ _{80 mV}
-
+
OUT
_
Input
Power
Detect
I_OUT x 1.5 V
540 AW
ISET
bq24090, bq24091
bq24092, bq24093
bq24095
SLUS968D – JANUARY 2010 – REVISED DECEMBER 2012
Charge
Pump
IN
+
_
IN-DPMREF
FAST CHARGE
PRE-CHARGE
IN
1.5V
Pre-CHG Reference
OUT
OUT
OUTREGREF
TJ°C
125°CREF
USB Sense
Resistor
Term Reference
+
_
75mA ⁺
PRE-TERM
+_{Increased from 75mA to 85mA for}
1^st minute of charge.
+
_
OUT
+
VTERM_EN
_
ISET2 (LO = ISET, HI = USB500, 0.9V Float
FLOAT = USB100)
VCOLD-10^oC
HI = Half CHG (JEITA)
VHOT-45^oC
VCOLD-FLT
HI = 4.06Vreg (JEITA)
USB100/500REF
T_J^oC
150^oC_REF
Thermal Shutdown
X2 Gain (1: 2)
Term:Pre-CHGX2
IN
OVP_REF
CHARGE
CONTROL
Charge
Pump
ON:
OFF:
CHG
On During
1st Charge Only
PG
VHOT-FLT
TS
VTTDM
+
TS - bq24090
_
LO = TTDM MODE
HI = Suspend CHG
VCE
VDISABLE
5mA
+
_
HI=CHIP DISABLE
+
_
Cold Temperature
Disable
Sink Current
Sink Current
= 45mA _{_} VCLAMP = 1.4V
= 20mA
+
+
_
45mA
Bq24090 is as shown
Copyright © 2010–2012, Texas Instruments Incorporated
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