BQ24171 Datasheet, PDF (15/35 Pages) Texas Instruments – JEITA Compliant Stand-Alone Switch-Mode Li-Ion and Li-Polymer Battery Charger with Integrated MOSFETs and Power Path Selector

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bq24171
SLUSAF2A – FEBRUARY 2011 – REVISED MAY 2011
FUNCTIONAL BLOCK DIAGRAM
bq24171
AVCC 4
3.6V
V_SRN+90mV
VREF 12
Thermal PAD
VREF
LDO
VSRN+100mV
VACN
UVLO
SLEEP
ACN-SRN
UVLO
ACOV
SYSTEM
POWER
SELECTOR
CONTROL
ACUV
SLEEP
1.35V
LOWV
CMSRC+6V
ACDRV
CHARGE PUMP
ACN
ACN-6V
2.184V
2.05V
BAT_OVP
RCHRG
AVCC
CE
REGN
LDO
FBO
EAI
FB 14
2.1V
1V
LEVEL
SHIFTER
IC T_J
120C
ACP 6
ACN ₅
ACSET 17
ISET ¹³
20xIAC
20X
CE
120mV
Fast-Chrg ^IBAT_REG
Pre-Chrg
Selection
LOWV
20μA _EAO
PWM
CONTROL
PWM
REGN
5mV
VSRP-VSRN
VSW+4.2V
VBTST
20μA
UCP
REFRESH
OCP
VSRP-VSRN
160%xVISET/20
EN_CHARGE
SRP 16
SRN 15
20xICHG
20X
Discharge
I_DISCHARGE
Termination
Qualification
I_QUAL
TTC 11
OVPSET 18
1.6V
0.5V
ACOV
ACUV
CE
RCHRG
10%xVISET
Charge
Termination
Discharge
Termination
Qualification
Fault
2V
STATE
BAT_SHORT MACHINE
VT1
I_FAULT
VSRN
Fast Charge Timer
(TTC)
Precharge Timer
(30 mins)
Timer Fault
IC T_J
T_SHUT
TSHUT
SUSPEND
VT2
VT3
ACOV
ACUV
VT4
SLEEP
UVLO
VT5
VREF
-
+
-
+
+
-
+
-
+
-
8 ACDRV
7 CMSRC
19 BATDRV
20 REGN
21 BTST
2 PVCC
3 PVCC
1 SW
24 SW
22 PGND
23 PGND
9 STAT
190 TS
Figure 16. Functional Block Diagram
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