BQ24450 Datasheet, PDF (4/20 Pages) Texas Instruments – INTEGRATED CHARGE CONTROLLER FOR LEAD-ACID BATTERIES

bq24450
SLUS929 – APRIL 2009 ..................................................................................................................................................................................................... www.ti.com
ISNSP ISNSM
IFB
DRVC
DRVE
ISNS
IN
BSTOP
Driver
12W
25 mV
+
V_IN
Q1
Current Sense
Comparator
250mV
+
Current Limit
Voltage Loop
V_{IN Q5}
V_REF
V_VFB
COMP
VFB
PRE-CHG
V_IN
Voltage Reference
2.3V at 25^oC
V_REF
UVLO
-3.5 mV/C
V_IN
Q2 Q3
Enable Comparator
CE
V_REF
Q4
Voltage Sense
Comparator
V_VFB
Q7
S1 _0.95VREF
S0 ^0.90VREF
Q8
PGOOD
STAT1
R
Q
L1
S
R
Q
L2
S
STAT2
Q9
GN
Figure 1. Simplified Block Diagram
4
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