bq24170
bq24172
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SLUSAD2A –NOVEMBER 2010–REVISED NOVEMBER 2010
FUNCTIONAL BLOCK DIAGRAM
CMSRC+6V
ACDRV
CHARGE PUMP
SLEEP
ACN-SRN
UVLO
bq24170
bq24172
VSRN+100mV
VACN
SYSTEM
POWER
ACDRV
CMSRC
8
7
SELECTOR
CONTROL
3.6V
ACOV
UVLO
ACN
ACUV
4
AVCC
19
BATDRV
VSRN+90mV
ACN-6V
SLEEP
1.35V
2.05V
LOWV
VREF
LDO
12
VREF
RCHRG
Thermal PAD
AVCC
CE
REGN
LDO
20
BAT_OVP
REGN
2.184V
21 BTST
SRN
EAI
FBO
2
3
PVCC
PVCC
bq24170
bq24172
CELL (170)
FB (172)
14
1V
LEVEL
SHIFTER
2.1V
1
SW
24 SW
IC TJ
120C
PWM
CONTROL
REGN
20μA
PWM
EAO
6
5
ACP
ACN
20xIAC
22
PGND
20X
23 PGND
5mV
UCP
17
ACSET
CE
VSRP-VSRN
OCP
VSRP-VSRN
120mV
160%xVISET/20
REFRESH
13
ISET
IBAT_REG
VSW+4.2V
VBTST
Fast-Chrg
Pre-Chrg
Selection
20μA
LOWV
EN_CHARGE
STAT
9
CE
RCHRG
Charge
16
15
SRP
SRN
20xICHG
20X
Discharge
Termination
10%xVISET
Termination
Qualification
VREF
STATE
MACHINE
2V
VSRN
Discharge
IDISCHARGE
Termination
Qualification
Fault
LTF
BAT_SHORT
IQUAL
IFAULT
SUSPEND
HTF
TCO
Fast Charge Timer
(TTC)
Timer Fault
TTC 11
TS
10
Precharge Timer
(30 mins)
ACOV
ACUV
OVPSET 18
ACOV
ACUV
1.6V
0.5V
SLEEP
UVLO
IC TJ
TSHUT
TSHUT
Figure 18. Functional Block Diagram
Copyright © 2010, Texas Instruments Incorporated
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