BQ20Z75_08 Datasheet, PDF (2/20 Pages) Texas Instruments – SBS 1.1-COMPLIANT GAS GAUGE AND PROTECTION-ENABLED IC WITH IMPEDANCE TRACK

bq20z75
SLUS723C – JULY 2007 – REVISED JULY 2008............................................................................................................................................................... www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
SYSTEM PARTITIONING DIAGRAM
Pack +
SMBD
SMBC
SMBD
SMBC
SMB 1.1
Data Flash
Memory
Charging
Algorithm
SHA-1
Authentication
Pack -
Fuse Blow
Detection and
Logic
System Control
Over
Temperature
Protection
Temperature
Measurement
Oscillator
Over- & Under-
Voltage
Protection
Over Current
Protection
Pre Charge FET
& PGOD Drive
N-Channel FET
Drive
AFE HW Control
Voltage
Measurement
Impedance
Track ™
Gas Gauging
Coloumb
Counter
HW Over
Current &
Short Circuit
Protection
RSNS
5mΩ – 20mΩ typical
Power Mode
Control
Watchdog
Cell Voltage
Multiplexer
Cell Balancing
Regulators
RBI
¯M¯S¯R¯T¯
R¯¯E¯S¯E¯T¯
¯A¯L¯E¯R¯T¯
VCELL+
VC1
VC2
VC3
VC4
VC5
REG33
REG25
bq20z75
TSSOP (PW)
(TOP VIEW)
DSG 1
PACK 2
VCC 3
ZVCHG 4
GPOD 5
PMS 6
VSS 7
REG33 8
TOUT 9
VCELL+ 10
ALERT 11
PRES 12
TS1 13
TS2 14
PFIN 15
SAFE 16
SMBD 17
SMBC 18
NC 19
38 CHG
37 BAT
36 VC1
35 VC2
34 VC3
33 VC4
32 VC5
31 ASRP
30 ASRN
29 RESET
28 VSS
27 RBI
26 REG25
25 VSS
24 MRST
23 GSRN
22 GSRP
21 VSS
20 VSS
VC1
VDD
VC2
OUT
VC3
CD
VC4
GND
bq294xx
2
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