BQ24616 Datasheet, PDF (13/34 Pages) Texas Instruments – JEITA Guideline Compatible Stand-Alone Synchronous Switch-Mode Li-Ion or Li-Polymer Battery Charger with System Power Selector and Low Iq

bq24616
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BLOCK DIAGRAM
SLUSA49A – APRIL 2010 – REVISED MAY 2010
bq24616
VREF
CE
VREF
INTERNAL
REFERENCE
ACN ACN-6 V ACN-6 V
LDO
3.3 V
LDO
VCC
SLEEP
UVLO
1M
VCC
-
SRN+100 mV
+
VCC
-
VUVLO
+
ACN +
SRN+200 mV -
SLEEP
UVLO
ACN-SRN
ACOV
SYSTEM
POWER
SELECTOR
LOGIC
VCC-6 V VCC-6 V
LDO
VCC
VCC-6V
ACN
ACN-6V
ACP
ACN
ACSET
VFB
SRP
SRN
+
20X
-
20XV(ACP-ACN)
+
-
VFB_REG
+
20X
V(SRP-SRN)
-
IBAT_ REG
CHARGE
OR
DISCHARGE
8 mA 2 mA
FAULT
20µA
COMP
ERROR
AMPLIFIER
-
+
1V
CE
PWM
20 µA
BAT _OVP
+
SRP-SRN
-
+
5 mV -
SYNCH
BTST
PH +
4.2V
V(SRP-SRN)
160% X IBAT_REG
- REFRESH
+
CHG_OCP
PWM
CONTROL
LOGIC
LEVEL
SHIFTER
VCC
CE
6 V LDO
ISET1
ISET2
ISET1
2
ISET1
ISET2
LOWV
IBAT_ REG
TTC Safety
Timer
IC Tj +
145 degC
-
VT1, VT2
VFB
104% X VFB_REG
-
VFB
+
+
-
1.55V
TTC -
0.4 V +
FAULT
TSHUT
BAT _OVP
STATE
MACHINE
LOGIC
DISABLE
TMR/TERM
BATTERY
DETECTION
LOGIC
CHARGE
STAT1
STAT2
PG
TTC
VCC +
-
VACOV
+
-
ACOV
DISCHARGE
VT1
VT1, VT2
VFB -
VFB_REG
+
50 mV
RCHRG
20XV(SRP- SRN)
ISET2
5
TERM
2.1V
VT3, VT4, VT5
VT2
RCHRG
VT3
TERM
SUSPEND
TERMINATE CHARGE
VT4
2.05V
VFB_REG
VT5
2.025V
VT3, VT4, VT5
VREF
-
+
-
+
+
-
+
-
+
-
Figure 13. Functional Block Diagram for bq24616
VCC
ACDRV
BATDRV
BTST
HIDRV
PH
REGN
LODRV
GND
STAT 1
STAT 2
PG
TTC
TS
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