BQ24750_07 Datasheet, PDF (17/38 Pages) Texas Instruments – Host-controlled Multi-chemistry Battery Charger with Integrated System Power Selector and AC Over-Power Protection

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FUNCTIONAL BLOCK DIAGRAM
bq24750
SLUS735 – DECEMBER 2006
ACDET
ACOP
CHGEN
VREF
0.6V ^-
ENA_BIAS
700 ms
+
2.4V ^-
ADAPTER DETECTED Delay
+
Rising
VREF
ENA_SRC
Isrc=K*V(PVCC-ACP)
K=18uA/V
ENA_SNK
5uA
2V
+
-
+
ACOPDET
-
ACDET
PVCC
-
BAT
+
185 mV
S Q ^ACOP_LATCH
PVCC_UVLO
RQ
PVCC- BAT
3.3V
LDO
ENA_BIAS
PVCC
EAI
EAO
SYSTEM
POWER
SELECTOR
LOGIC
PVCC-6V PVCC-6V
LDO
ENA_BIAS
PVCC
PVCC-6V
ACN
ACN -6V
ACGOOD
PVCC
ACDRV
BATDRV
ACP
ACN
BAT
SRP
SRN
ACSET
SRSET
VADJ
+
V(ACP-ACN)
-
-
IIN_REG ₊
-
+
285 mV
10mA
CHRG_ON
V(ACN-BAT)
-
VBAT_REG ₊
FBO
IIN_ER
BAT _ER
COMP
ERROR
AMPLIFIER
-
+
1V
BAT_OVP
CHG_OCP
20uA
/CHGEN
+
V(SRP-SRN)
20X
- ICH_ER
-
IBAT_ REG ₊
20uA
ACOP
SUSPEND
SYNCH
DC-DC
CONVERTER
PWM LOGIC
LEVEL
SHIFTER
OVP
PVCC _{6V LDO}
ENA_BIAS
V(SRP - SRN) +
–
13 mV
+
-
SYNCH
BTST
–
+
4 V ^+_
PH
REFRESH
CBTST
IC Tj
+
TSHUT
155°C –
VBATSET
IBATSET
IINSET
VBAT _REG
BAT
104% X VBAT_REG
IBAT _REG
+
–
BAT _OVP
RATIO
PROGRAM
IIN_REG
V(SRP-SRN)
+
CHG_OCP
145% X IBAT_REG
–
CHRG_ON
ACP
ACN
+
V(IADAPT)
20x
-
DPM_LOOP_ON
BTST
HIDRV
PH
REGN
LODRV
PGND
IADAPT
DPMDET
VDAC
AGND
CELLS
2, 3, 4
bq24750
ACDET ⁺
–
3.1V
+
-
ACOV
VREF
LTF
-
+
PVCC – _UVLO
TS
+
4V
+
-
SUSPEND
HTF
+
-
TCO
+
-
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