BQ24170 Datasheet, PDF (17/35 Pages) Texas Instruments – 1.6-MHz Synchronous Switch-Mode Li-Ion and Li-Polymer Stand-Alone Battery Charger

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bq24170
bq24172
SLUSAD2A – NOVEMBER 2010 – REVISED NOVEMBER 2010
FUNCTIONAL BLOCK DIAGRAM
bq24170
bq24172
3.6V
AVCC 4
V_SRN+90mV
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
VREF 12
Thermal PAD
VREF
LDO
2.184V
2.05V
BAT_OVP
RCHRG
AVCC
CE
REGN
LDO
SRN
CELL (170)
FB (172) ¹⁴
bq24170
2.1V
bq24172
IC T_J
120C
FBO
EAI
1V
20μA _EAO
LEVEL
SHIFTER
PWM
CONTROL
PWM
REGN
ACP 6
ACN ₅
ACSET 17
ISET ¹³
20xIAC
20X
CE
120mV
Fast-Chrg ^IBAT_REG
Pre-Chrg
Selection
LOWV
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
LTF
I_FAULT
VSRN
Fast Charge Timer
(TTC)
Precharge Timer
(30 mins)
Timer Fault
SUSPEND _HTF
ACOV
ACUV
TCO
IC T_J
T_SHUT
TSHUT
SLEEP
UVLO
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
10 TS
Figure 18. Functional Block Diagram
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