BQ24745_14 Datasheet, PDF (17/39 Pages) Texas Instruments – SMBus-Controlled Multi-Chemistry Battery

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bq24745
SLUS761D – DECEMBER 2007 – REVISED OCTOBER 2011
FUNCTIONAL BLOCK DIAGRAM
ACIN
DCIN
CE
CSSP
CSSN
VFB
CSOP
CSON
VDDSMB
SDA
SCL
ICREF
ICOUT
0.6V -
+
WAKEUP
DCIN_UVLO
ENA
2.4V ⁺
-
3.3V
LDO
VREF
ENA
ACOK
DCIN_UVLO
+ _{20xV(CSSP-CSSN)}
- ^20X
+
IIN_REG
-
IIN_ER
VFB_DIV
VBAT _REG
+ BAT_ER
-
FBO
EAI
COMP
ERROR
AMPLIFIER
-
+
1V
20uA
EAO
CHRG_ENA
LEVEL
SHIFTER
+
20X
20xV(CSOP-CSON)
+
-
IBAT_ REG
-
ICH_ER
20uA
ENA
DC-DC
CONVERTER
PWM LOGIC
CHRG_ENA
V(BTST-PHASE)
-
+
4V ^+_
REFRESH
CBTST
DCIN _{6V LDO}
ACOK
CE
IC Tj +
155degC
-
`
ENA
104% X VBAT_REG _-
SMBus
Logic
VBAT _REG
VFB_DIV +
CHRG_V ^IBAT_REG
(11 bit DAC)
CHRG_I
IIN_REG
145% X IBAT_REG
20xV(CSOP-CSON)
-
+
(6 bit DAC)
INPUT_I
(6 bit DAC)
V(CSOP-CSON) -
VICM +
+
10mV
+
-
-
DCIN -
+
4V
+
-
TSHUT
BAT _OVP
CHG_OCP
CHG_UCP
DCIN_UVLO
VDDSMB _-
+
2.5V
+
-
20xV(CSSP-CSSN) _1x
ENA
BAT_SHORT -
+
VFB
+
-
2.5V
VDDSMB_UVLO
bq24745
ACOK
VREF
FBO
EAI
EAO
BOOT
UGATE
PHASE
VDDP
LGATE
PGND
VICM
GND
NC
NC
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