BQ24740_07 Datasheet, PDF (16/32 Pages) Texas Instruments – Host-controlled Multi-chemistry Battery Charger with Low Input Power Detect

bq24740
SLUS736 – DECEMBER 2006
FUNCTIONAL BLOCK DIAGRAM
www.ti.com
0.6V ^-
+
ACDET
ENA_BIAS_CMP
VREF
IADSLP
3.3V
LDO
ENA_BIAS
PVCC
/IADSLP
2.4V
-
AC VGOOD
+
V(IADAPT)
EAI
EAO
250mV
+
-
700 ms
Delay
Rising
+ AC IGOOD
-
EXTPWR
CHGEN
ACP
ACN
BAT
+
V(ACP-ACN)
-
-
IIN_REG
+
10mA
CHRG_ON
-
VBAT_REG
+
FBO
IIN_ER
1V
BAT_ER
COMP
ERROR
AMPLIFIER
-
+
20 mA BAT_SHORT
CHGEN
LEVEL
SHIFTER
PVCC
BTST
HIDRV
SRP
SRN
ISYNSET
ACSET
SRSET
VADJ
+
V(SRP-SRN)
20X
- ICH_ER
-
IBAT_ REG ₊
V(SRP - SRN) +
-
SYNCH
20 mA
BTST
BAT
–
+
2.9 V/Cell
+
-
BAT_SHORT
4 V ^+_
PH
IC Tj +
155°C
–
ACOP
SYNCH
REFRESH
-
C _BTST
+
TSHUT
DC-DC
CONVERTER
PWM LOGIC
VBATSET
IBATSET
VBAT_REG
BAT
+
BAT_OVP
IINSET
104% X VBAT_REG
IBAT_REG
–
RATIO
PROGRAM
IIN_REG
V(SRP-SRN)
+
CHG_OCP
145% X IBAT_REG
–
PVCC _{6V LDO}
ENA_BIAS
PH
REGN
LODRV
PGND
ACP
ACN
+ _V(IADAPT)
20x
-
IADAPT
VDAC
CELLS
2, 3, 4
LPREF
–
V(IADAPT) ₊
LPMD
ACDET ⁺
–
3.1V
+
-
ACOV
PVCC –
+
4V
+
-
UVLO
DPM_LOOP_ON
DPMDET
AGND
bq24740
16
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