BQ24747 Datasheet, PDF (16/36 Pages) Texas Instruments – SMBus-Controlled Level 2 Multi-Chemistry Battery Charger With Input Current Detect Comparator and Charge Enable Pin

bq24747
SLUS988 – OCTOBER 2009 ............................................................................................................................................................................................. www.ti.com
FUNCTIONAL BLOCK DIAGRAM
ACIN
DCIN
CE
CSSP
CSSN
VFB
CSOP
CSON
VDDSMB
SDA
SCL
ICREF
ICOUT
0.6V ^-
+
ENA_BIAS
DCIN _UVLO
CHRG_ENA
2.4V ⁺
-
ENA
DCIN
3.3V
LDO
ENA
VREF
ACOK
DCIN _UVLO
(DCIN -VFB )_CMP
+
V(CSSP-CSSN)
- IIN_ER
-
IIN_REG
+
10mA
CHRG_ENA
- BAT_ER
VBAT_REG
+
FBO
EAI
COMP
ERROR
AMPLIFIER
-
+
1V
20uA
EAO
CHRG_ENA
LEVEL
SHIFTER
ACOK
VREF
FBO
EAI
EAO
BOOT
UGATE
+
V(CSOP-CSON)
20X
- ICH_ER
-
IBAT _ REG ₊
20uA
V(CSOP-CSON) +
-
10mV
+
-
SYNCH
V(BTST-PHASE)
VFB
-
+
2.9V
+
-
BAT _SHORT
4V ^+_
IC Tj +
EN
SYNCH
DC-DC
CONVERTER
PWM LOGIC
BAT_SHORT
-
REFRESH
CBTST
+
TSHUT
SMBus_Bias
SMBus
Logic
EN
145degC
V(DCIN-VFB)
185mV
-
(DCIN-VFB)_CMP
-
+
CHRG_V
(11 bit DAC)
VBAT_REG _{145% X IBAT_REG}
-
CHRG_I
(6 bit DAC)
IBAT_REG
V(CSOP-CSON) +
INPUT_I
(6 bit DAC)
IIN_REG
ACIN +
VICM +
-
3.1V
+
-
CHG_OCP
ACOV
-
DCIN -
DCIN_UVLO
+
4V
+
-
VDDSMB _-
LOWV Comp = 4 V
Reset CE for 2 ms
+
2.5V
+
-
DCIN _{6V LDO}
ENA_BIAS
CSSP
CSSN
+
VICM
20x
- _ENA
ENA_BIAS
VDDSMB_UVLO
bq24747
PHASE
VDDP
LGATE
PGND
VICM
GND
NC
NC
16
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