BQ24040_16 Datasheet, PDF (12/38 Pages) Texas Instruments – Single Cell Li-Ion and Li-Pol Battery Charger With Auto Start

bq24040, bq24041, bq24045
SLUS941F – SEPTEMBER 2009 – REVISED MARCH 2015
8.2 Functional Block Diagram
IN
I_OUT x 1.5 V
540 AW
ISET
Internal Charge
Current Sense
w/ Multiple Outputs
+ _{80 mV}
-
+
OUT
_
Input
Power
Detect
Charge
Pump
IN
+
_
IN-DPMREF
FAST CHARGE
PRE-CHARGE
IN
1.5V
Pre-CHG Reference
USB Sense
Resistor
Term Reference
+
_
75mA ⁺
PRE-TERM
bq24040 and
bq24045 Only
+_{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
VHOT-45^oC
VCOLD-FLT
HI = Half CHG (JEITA)
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
VHOT-FLT
TS/BAT_EN
VTTDM
TS - bq24040 and
bq24045
BAT_EN - bq24041
VCE
VDISABLE
5mA
LO = TTDM MODE
HI = Suspend CHG
+
_
+
bq24041 This Comparator Only – No TS Features
_
HI=CHIP DISABLE
+
_
Cold Temperature
Disable
Sink Current
Sink Current
= 45mA
VCLAMP = 1.4V
+
= 20mA
+
_
_
45mA
Bq24040 and bq24045 are as shown
Bq24041 has no Current Sinks and only 5mA Current Source
Figure 7. Functional Block Diagram
www.ti.com
OUT
OUT
OUTREGREF
TJ°C
125°CREF
Charge
Pump
ON:
OFF:
CHG
On During
1st Charge Only
PG
OUT
ASO
bq24041
Only
ASI
200kW
12
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