bq20z90
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SLUS662A – DECEMBER 2005 – REVISED JUNE 2006
SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK™
TECHNOLOGY FOR USE WITH THE bq29330
FEATURES
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Patented Impedance Track™ Technology
Accurately Measures Available Charge in
Li-Ion and Li-Polymer Batteries
Better than 1% Error Over Lifetime of the
Battery
Instant Accuracy – No Learning Cycle
Required
Automatically adjusts for battery aging,
battery self discharge and temperature
inefficiencies
Supports the Smart Battery Specification
SBS V1.1
Works With the TI bq29330 Analog Front-End
(AFE) Protection IC to Provide Complete Pack
Electronics Solution
Full Array of Programmable Voltage, Current,
and Temperature Protection Features
Integrated Time Base Removes Need for
External Crystal with Optional Crystal Input
Electronics for 7.2-V, 10.8-V or 14.4-V Battery
Packs With 50% Fewer External Components
Based on a Powerful Low-Power RISC CPU
Core With High-Performance Peripherals
Integrated Field Programmable FLASH
Memory Eliminates the Need for External
Configuration Memory
Measures Charge Flow Using a
High-Resolution, 16-Bit Integrating
Delta-Sigma Converter
– Better Than 0.65 nVh of Resolution
– Self-Calibrating
Uses 16-Bit Delta-Sigma Converter for
Accurate Voltage and Temperature
Measurements
Extensive Data Reporting Options For
Improved System Interaction
•
Optional Pulse Charging Feature for
Improved Charge Times
Drives 3-, 4- or 5-Segment LED Display for
Remaining Capacity Indication
Supports SHA-1 Authentication
Lifetime Data Logging
30-Pin TSSOP (DBT)
•
•
•
•
APPLICATIONS
•
•
•
Notebook PCs
Medical and Test Equipment
Portable Instrumentation
DESCRIPTION
The bq20z90 SBS-compliant gas gauge IC,
incorporating
patented
Impedance
Track™
technology, is designed for battery-pack or in-system
installation. The bq20z90 measures and maintains
an accurate record of available charge in Li-ion or
Li-polymer
batteries
using
its
integrated
high-performance analog peripherals. The bq20z90
monitors capacity change, battery impedance,
open-circuit voltage, and other critical parameters of
the battery pack, and reports the information to the
system host controller over a serial-communication
bus. It is designed to work with the bq29330 analog
front-end (AFE) protection IC to maximize
functionality and safety, and minimize component
count and cost in smart battery circuits.
The Impedance Track technology continuously
analyzes the battery impedance, resulting in superior
gas-gauging accuracy. This enables remaining
capacity to be calculated with discharge rate,
temperature, and cell aging all accounted for during
each stage of every cycle.
AVAILABLE OPTIONS
PACKAGE
TA
30-PIN TSSOP (DBT)
Tube
30-PIN TSSOP (DBT)
Tape & Reel
–40°C to
85°C
bq20z90DBT (1)
bq20z90DBTR (2)
(1)
(2)
A single tube quantity is 50 units.
A single reel quantity is 2000 units
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
IMPEDANCE TRACK is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2005–2006, Texas Instruments Incorporated
bq20z90
www.ti.com
SLUS662A – DECEMBER 2005 – REVISED JUNE 2006
SYSTEM PARTITIONING DIAGRAM
Discharge / Charge /
Pre-Charge FETs
Fuse
Pack +
Host Interface & Data
Management
System Interface
2k Bytes of
Data Flash
2k Bytes
of RAM
6k x 22
Mask ROM
24k x 22 Program
Flash
Nch FET Drive
(Charge Pumps)
32.768kHz
Watchdog &
Protection Timing
I2C
System Interface
RAM Configuration, Status
and Control Registers
TOUT and LEDOUT
Power Support
T1
Standard Delta-Sigma A to D Converter
Analog Output Drive
Integrating Delta-Sigma A to D Converter
2-Tier Over Current
Protection
Pack -
TSSOP (DBT)
(TOP VIEW)
NC
XALERT
SDATA
1
2
3
SCLK
CLKOUT
TS1
TS2
PRES
PFIN
SAFE
4
5
SMBD
NC
SMBC
DISP
NC
6
7
8
9
10
11
12
13
14
15
30
29
28
27
26
25
24
23
22
21
20
VCELLVCELL+
NC
RBI
VCC
VSS
MRST
SRN
SRP
*VSS
19
LED5
LED4
18
17
16
LED3
LED2
LED1
NC - No internal connection
2
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Precharge
Control
Cell, Bat and Pack
Voltage Translation
Reset
32kHz Oscillator and 8MHz System Clock
SMBus
HDQ
LDO +
Reset
2.5V / 3.3V (LED)
Cell Balancing Drive
16 Dig GPIO & Peripherals
8 Dig GPIO or Analog GPI
bq20z90
www.ti.com
SLUS662A – DECEMBER 2005 – REVISED JUNE 2006
TERMINAL FUNCTIONS
TERMINAL
NO.
(1)
NAME
I/O (1)
DESCRIPTION
1
NC
–
Not used— leave floating
2
XALERT
I
Input from bq29330 XALERT output.
3
SDATA
I/O
Data transfer to and from bq29330
4
SCLK
I/O
Communication clock to the bq29330
5
CLKOUT
O
32.768-kHz output for the bq29330. This pin should be directly connected to the AFE.
6
TS1
I
1st Thermistor voltage input connection to monitor temperature
7
TS2
I
2nd Thermistor voltage input connection to monitor temperature
8
PRES
I
Active low input to sense system insertion and typically requires additional ESD protection
9
PFIN
I
Active low input to detect secondary protector output status and allows the bq20z90 to report the
status of the 2nd level protection output
Active high output to enforce additional level of safety protection; e.g., fuse blow.
10
SAFE
O
11
SMBD
I/OD
12
NC
–
13
SMBC
I/OD
SMBus clock open-drain bidirectional pin used to clock the data transfer to and from the bq20z90
14
DISP
I
Display control for the LEDs. This pin is typically connected to bq29330 REG via a 100-kΩ resistor
and a push-button switch to VSS.
SMBus data open-drain bidirectional pin used to transfer address and data to and from the bq20z90
Not used— leave floating
15
NC
–
Not used— leave floating
16
LED1
O
LED1 display segment that drives an external LED depending on the firmware configuration
17
LED2
O
LED2 display segment that drives an external LED depending on the firmware configuration
18
LED3
O
LED3 display segment that drives an external LED depending on the firmware configuration
19
LED4
O
LED4 display segment that drives an external LED depending on the firmware configuration
20
LED5
O
LED5 display segment that drives an external LED depending on the firmware configuration
21
VSS
–
Connected I/O pin to VSS
22
SRP
IA
Connections to the top of a small-value sense resistor to monitor the battery charge- and
discharge-current flow
23
SRN
IA
Connections to the bottom of a small-value sense resistor to monitor the battery charge- and
discharge-current flow
24
MRST
I
Master reset input that forces the device into reset when held low. Must be held high for normal
operation
25
VSS
P
Negative Supply Voltage
26
VCC
P
Positive Supply Voltage
27
RBI
P
Backup power to the bq20z90 data registers during periods of low operating voltage. RBI accepts a
storage capacitor or a battery input.
28
NC
–
Not used— leave floating
29
VCELL+
I
Input from bq29330 used to read a scaled value of individual cell voltages
30
VCELL-
I
Input from bq29330 used to read a scaled value of individual cell voltages
I = Input, IA = Analog input, I/O = Input/output, I/OD = Input/Open-drain output, O = Output, OA = Analog output, P = Power
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SLUS662A – DECEMBER 2005 – REVISED JUNE 2006
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range (unless otherwise noted) (1)
RANGE
VCC relative to VSS
Supply voltage range
V(IOD) relative to VSS
Open-drain I/O pins
VI relative to VSS
Input voltage range to all other pins
TA
Operating free-air temperature range
–40°C to 85°C
Tstg
Storage temperature range
–65°C to 150°C
(1)
–0.3 V to 2.75 V
–0.3 V to 6 V
–0.3 V to VCC + 0.3 V
Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating
conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
VCC = 2.4 V to 2.6 V, TA = –40°C to 85°C (unless otherwise noted)
PARAMETER
VCC
ICC
TEST CONDITIONS
Supply voltage
TYP
MAX
2.4
2.5
2.6
400 (1)
No flash programming
Operating mode current
I(SLP) Low-power storage mode current
bq20z90 + bq29330
475
Sleep mode
8 (1)
bq20z90 + bq29330
UNIT
V
µA
µA
51
Output voltage low SMBC, SMBD, SDATA, SCLK, SAFE
IOL = 0.5 mA
0.4
V
LED1 – LED5
IOL = 10 mA
0.4
V
VOH
Output high voltage, SMBC, SMBD, SDATA, SCLK, SAFE
IOH = –1 mA
VIL
Input voltage low SMBC, SMBD, SDATA, SCLK, XALERT,
PRES, PFIN
–0.3
0.8
DISP
–0.3
0.8
Input voltage high SMBC, SMBD, SDATA, SCLK, XALERT,
PRES, PFIN
2
6
DISP
2
VOL
VIH
CIN
VCC– 0.5
Input capacitance
V
VCC + 0.3
5
V(AI1) Input voltage range VCELL+, VCELL-,TS1, TS2
V(AI2) Input voltage range SR1, SR2
V
V
V
V
pF
- 0.2
0.8XVCC
– 0.20
0.20
V
Z(AI2) Input impedance VCELL+, VCELL-, TS1, TS2
0 V–1 V
8
MΩ
Z(AI1) Input impedance SR1, SR2
0 V–1 V
2.5
MΩ
(1)
4
MIN
This value does not include the bq29330
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bq20z90
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SLUS662A – DECEMBER 2005 – REVISED JUNE 2006
POWER-ON RESET
VCC = 2.4V to 2.6 V, TA = –40°C to 85°C (unless otherwise noted)
MIN
TYP
MAX
VIT–
Negative-going voltage input
PARAMETER
TEST CONDITIONS
1.7
1.8
1.9
UNIT
V
VHYS
Power-on reset hysteresis
50
125
200
mV
MAX
UNIT
POWER ON RESET BEHAVIOR
VS
FREE-AIR TEMPERATURE
Power-On Reset Negative-Going Voltage - V
1.81
1.8
1.79
1.78
1.77
1.76
-40
-20
0
20
40
60
80
TA - Free-Air Temperature - °C
INTEGRATING ADC (Coulomb Counter) CHARACTERISTICS
VCC = 2.4V to 2.6 V, TA = –40°C to 85°C (unless otherwise noted)
PARAMETER
V(SR)
Input voltage range, V(SRN) and V(SRP)
V(SROS)
Input offset
INL
Integral nonlinearity error
TEST CONDITIONS
V(SR) = V(SRN) – V(SRP)
MIN
TYP
–0.2
0.2
0.007%
V
µV
10
0.034%
OSCILLATOR
VCC = 2.4 V to 2.6 V, TA = –40°C to 85°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
4.194
MHz
HIGH FREQUENCY OSCILLATOR
f(OSC) Operating Frequency
f(EIO) Frequency Error (1) (2)
t(SXO) Start-up
TA = 20°C to 70°C
Time (3)
-3% 0.25%
3%
-2% 0.25%
2%
2.5
5
ms
LOW FREQUENCY OSCILLATOR
f(LOSC) Operating Frequency
f(LEIO) Frequency Error (2) (4)
(1)
(2)
(3)
(4)
32.768
TA = 20°C to 70°C
KHz
-2.5% 0.25%
2.5%
-1.5% 0.25%
1.5%
The frequency error is measured from 4.194 MHz.
The frequency drift is included and measured from the trimmed frequency at VCC = 2.5 V, TA = 25°C.
The start-up time is defined as the time it takes for the oscillator output frequency to be within 1% of the specified frequency.
The frequency error is measured from 32.768 kHz.
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bq20z90
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SLUS662A – DECEMBER 2005 – REVISED JUNE 2006
OSCILLATOR (continued)
VCC = 2.4 V to 2.6 V, TA = –40°C to 85°C (unless otherwise noted)
PARAMETER
t(LSXO) Start-up time
(5)
TEST CONDITIONS
MIN
TYP
(5)
MAX
UNIT
500
µs
The start-up time is defined as the time it takes for the oscillator output frequency to be ± 3%.
DATA FLASH MEMORY CHARACTERISTICS
VCC = 2.4 V to 2.6 V, TA = –40°C to 85°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
Data retention
See
(1)
10
Flash programming write-cycles
See
(1)
20,000
t(WORDPROG) Word programming time
See
(1)
I(DDdPROG)
See
(1)
tDR
(1)
Flash-write supply current
TYP
MAX
UNIT
Years
Cycles
2
ms
5
10
mA
TYP
MAX
UNIT
1500
nA
Assured by design. Not production tested
REGISTER BACKUP
VCC = 2.4 V to 2.6 V, TA = –40°C to 85°C (unless otherwise noted)
PARAMETER
I(RB)
RB data-retention input current
TEST CONDITIONS
MIN
V(RB) > V(RBMIN), VCC < VITV(RB) > V(RBMIN), VCC < VIT-, TA = 0°C
to 50°C
V(RB)
(1)
6
RB data-retention voltage (1)
40
1.7
Specified by design. Not production tested.
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160
V
bq20z90
www.ti.com
SLUS662A – DECEMBER 2005 – REVISED JUNE 2006
SMBus TIMING SPECIFICATIONS
VCC = 2.4 V to 2.6 V, TA = –40°C to 85°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
fSMB
SMBus operating frequency
Slave mode, SMBC 50% duty cycle
fMAS
SMBus master clock frequency
Master mode, no clock low slave extend
tBUF
Bus free time between start and stop
tHD:STA
Hold time after (repeated) start
tSU:STA
Repeated start setup time
tSU:STO
Stop setup time
MIN
TYP
10
MAX
100
51.2
kHz
4.7
4
µs
4.7
4
Receive mode
0
Transmit mode
300
tHD:DAT
Data hold time
tSU:DAT
Data setup time
tTIMEOUT
Error signal/detect
tLOW
Clock low period
tHIGH
Clock high period
See
(2)
tLOW:SEXT
Cumulative clock low slave extend time
See
(3)
25
tLOW:MEXT
Cumulative clock low master extend time
See
(4)
10
tF
Clock/data fall time
(VILMAX– 0.15 V) to (VIHMIN + 0.15 V)
tR
Clock/data rise time
0.9 VCC to (VILMAX – 0.15 V)
(1)
(2)
(3)
(4)
UNIT
ns
250
See
(1)
25
35
4.7
4
50
300
1000
ms
µs
ms
ns
The bq20z90 times out when any clock low exceeds tTIMEOUT.
tHIGH:MAX. is minimum bus idle time. SMBC = 1 for t > 50 µs causes reset of any transaction involving the bq20z90 that is in progress.
tLOW:SEXT is the cumulative time a slave device is allowed to extend the clock cycles in one message from initial start to the stop.
tLOW:MEXT is the cumulative time a master device is allowed to extend the clock cycles in one message from initial start to the stop.
SMBus TIMING DIAGRAM
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bq20z90
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SLUS662A – DECEMBER 2005 – REVISED JUNE 2006
FEATURE SET
Primary (1st Level) Safety Features
The bq20z90 supports a wide range of battery and system protection features that can easily be configured. The
primary safety features include:
•
•
•
•
•
•
•
•
Battery cell over/under voltage protection
Battery pack over/under voltage protection
2 independent charge overcurrent protection
3 independent discharge overcurrent protection
Short circuit protection
Over temperature protection
AFE Watchdog
Host Watchdog
Secondary (2nd Level) Safety Features
The secondary safety features of the bq20z90 can be used to indicate more serious faults via the SAFE (pin 10)
pin. This pin can be used to blow an in-line fuse to permanently disable the battery pack from charging or
discharging. The secondary safety features include:
•
•
•
•
•
•
•
•
•
•
•
•
Safety over voltage
Battery cell imbalance
2nd level protection IC input
Safety over current
Safety over temperature
Open thermistor
Charge FET and Zero-Volt Charge FET fault
Discharge FET fault
Fuse blow failure detection
AFE Communication error
AFE Verification error
Internal flash data error
Charge Control Features
The bq20z90 charge control features include:
•
•
•
•
•
•
•
Report the appropriate charging current needed for constant current charging and the appropriate charging
voltage needed for constant voltage charging to a smart charger using SMBus broadcasts.
Determine the chemical state of charge of each battery cell using Impedance Track™. Using cell balancing
algorithm, gradually decrease the differences in the cells' state of charge in a fully charged state. This
prevents high cells from overcharging, causing excessive degradation and also increases the usable pack
energy by preventing early charge termination.
Support Pre-charging/Zero-volt charging
Support Fast charging
Support Pulse charging
Support Charge Inhibit and Charge Suspend modes
Report charging faults and also indicate charging status via charge and discharge alarms.
Gas Gauging
The bq20z90 uses the Impedance Track™ Technology to measure and calculate the available charge in battery
cells. The achievable accuracy is better than 1% error over the lifetime of the battery and there is no full
charge-discharge learning cycle required.
8
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bq20z90
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SLUS662A – DECEMBER 2005 – REVISED JUNE 2006
FEATURE SET (continued)
See Theory and Implementation of Impedance Track Battery Fuel-Gauging Algorithm application note
(SLUA364) for further details.
LED Display
The bq20z90 can drive a 3-, 4-, or 5- segment LED display for remaining capacity indication. The LED drive
current can be adjusted to 3mA, 4mA and 5mA digitally.
LifeTime Data Logging Features
The bq20z90 offers a lifetime data logging array, where all important measurements are stored for warranty and
analysis purposes. The data monitored include:
•
•
•
•
•
•
•
•
•
•
•
•
•
Lifetime
Lifetime
Lifetime
Lifetime
Lifetime
Lifetime
Lifetime
Lifetime
Lifetime
Lifetime
Lifetime
Lifetime
Lifetime
maximum temperature
minimum temperature
maximum battery cell voltage
minimum battery cell voltage
maximum battery pack voltage
minimum battery pack voltage
maximum charge current
maximum discharge current
maximum charge power
maximum discharge power
maximum average discharge current
maximum average discharge power
average temperature
Authentication
The bq20z90 supports authentication by the host using SHA-1.
Power Modes
The bq20z90 supports 3 different power modes to reduce power consumption:
•
•
•
In Normal Mode, the bq20z90 performs measurements, calculations, protection decisions, and data updates
in 1 second intervals. Between these intervals, the bq20z90 is in a reduced power stage.
In Sleep Mode, the bq20z90 performs measurements, calculations, protection decisions, and data updates
in adjustable time intervals. Between these intervals, the bq20z90 is in a reduced power stage.
In Shutdown Mode the bq20z90 is completety disabled.
CONFIGURATION
Oscillator Function
The bq20z90 fully integrates the system and processor oscillators and, therefore, requires no pins or
components for this feature.
System Present Operation
The bq20z90 periodically verifies the PRES pin and detects that the battery is present in the system via a low
state on a PRES input. When this occurs, bq20z90 enters normal operating mode. When the pack is removed
from the system and the PRES input is high, the bq20z90 enters the battery-removed state, disabling the
charge, discharge and ZVCHG FETs. The PRES input is ignored and can be left floating when non-removal
mode is set in the data flash.
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SLUS662A – DECEMBER 2005 – REVISED JUNE 2006
FEATURE SET (continued)
BATTERY PARAMETER MEASUREMENTS
The bq20z90 uses an integrating delta-sigma analog-to-digital converter (ADC) for current measurement, and a
second delta-sigma ADC for individual cell and battery voltage, and temperature measurement.
Charge and Discharge Counting
The integrating delta-sigma ADC measures the charge/discharge flow of the battery by measuring the voltage
drop across a small-value sense resistor between the SRP and SRN pins. The integrating ADC measures
bipolar signals from -0.25 V to 0.25 V. The bq20z90 detects charge activity when VSR = V(SRP)-V(SRN)is positive
and discharge activity when VSR = V(SRP)-V(SRN) is negative. The bq20z90 continuously integrates the signal over
time, using an internal counter. The fundamental rate of the counter is 0.65 nVh.
Voltage
The bq20z90 updates the individual series cell voltages through the bq29330 at one second intervals. The
bq20z90 configures the bq29330 to connect the selected cell, cell offset, or bq29330 VREF to the CELL pin of
the bq29330, which is required to be connected to VIN of the bq20z90. The internal ADC of the bq20z90
measures the voltage, scales it, and calibrates itself appropriately. This data is also used to calculate the
impedance of the cell for the Impedance Track™ gas-gauging.
Current
The bq20z90 uses the SRP and SRN inputs to measure and calculate the battery charge and discharge current
using a 5 mΩ to 20 mΩ typ. sense resistor.
Wake Function
The bq20z90 can exit sleep mode, if enabled, by the presence of a programmable level of current signal across
SRP and SRN.
Auto Calibration
The bq20z90 provides an auto-calibration feature to cancel the voltage offset error across SRP and SRN for
maximum charge measurement accuracy. The bq20z90 performs auto-calibration when the SMBus lines stay
low continuously for a minimum of a programmable amount of time.
Temperature
The bq20z90 TS1 and TS2 inputs, in conjunction with two identical NTC thermistors (default are Semitec
103AT), measure the battery environmental temperature. The bq20z90 can also be configured to use its internal
temperature sensor.
COMMUNICATIONS
The bq20z90 uses SMBus v1.1 with Master Mode and package error checking (PEC) options per the SBS
specification.
SMBus On and Off State
The bq20z90 detects an SMBus off state when SMBC and SMBD are logic-low for ≥ 2 seconds. Clearing this
state requires either SMBC or SMBD to transition high. Within 1 ms, the communication bus is available.
Table 1. SBS COMMANDS
SBS Cmd Mode
Name
Format
Size in
Bytes
Min
Value
Max
Value
Default Value
0x00
R/W
ManufacturerAccess
hex
2
0x0000
0xffff
—
0x01
R/W
RemainingCapacityAlarm
unsigned int
2
0
65535
300
mAh or
10mWh
0x02
R/W
RemainingTimeAlarm
unsigned int
2
0
65535
10
min
10
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bq20z90
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SLUS662A – DECEMBER 2005 – REVISED JUNE 2006
FEATURE SET (continued)
Table 1. SBS COMMANDS (continued)
SBS Cmd Mode
Name
Format
Size in
Bytes
Min
Value
Max
Value
Default Value
Unit
0x03
R/W
BatteryMode
hex
2
0x0000
0xe383
—
0x04
R/W
AtRate
signed int
2
-32768
32767
—
mA or 10mW
0x05
R
AtRateTimeToFull
unsigned int
2
0
65534
—
min
0x06
R
AtRateTimeToEmpty
unsigned int
2
0
65534
—
min
0x07
R
AtRateOK
unsigned int
2
0
65535
—
0x08
R
Temperature
unsigned int
2
0
65535
—
0.1°K
0x09
R
Voltage
unsigned int
2
0
65535
—
mV
0x0a
R
Current
signed int
2
-32768
32767
—
mA
0x0b
R
AverageCurrent
signed int
2
-32768
32767
—
mA
0x0c
R
MaxError
unsigned int
1
0
100
—
%
0x0d
R
RelativeStateOfCharge
unsigned int
1
0
100
—
%
0x0e
R
AbsoluteStateOfCharge
unsigned int
1
0
100+
—
%
0x0f
R/W
RemainingCapacity
unsigned int
2
0
65535
—
mAh or
10mWh
0x10
R
FullChargeCapacity
unsigned int
2
0
65535
—
mAh or
10mWh
0x11
R
RunTimeToEmpty
unsigned int
2
0
65534
—
min
0x12
R
AverageTimeToEmpty
unsigned int
2
0
65534
—
min
0x13
R
AverageTimeToFull
unsigned int
2
0
65534
—
min
0x14
R
ChargingCurrent
unsigned int
2
0
65534
—
mA
0x15
R
ChargingVoltage
unsigned int
2
0
65534
—
mV
0x16
R
BatteryStatus
unsigned int
2
0x0000
0xdbff
—
0x17
R/W
CycleCount
unsigned int
2
0
65535
—
0x18
R/W
DesignCapacity
unsigned int
2
0
65535
4400
mAh or
10mWh
0x19
R/W
DesignVoltage
unsigned int
2
0
65535
14400
mV
0x1a
R/W
SpecificationInfo
hex
2
0x0000
0xffff
0x0031
0x1b
R/W
ManufactureDate
unsigned int
2
—
—
01-Jan-1980
0x1c
R/W
SerialNumber
hex
2
0x0000
0xffff
0x0001
0x20
R/W
ManufacturerName
String
11+1
—
—
Texas Inst.
ASCII
0x21
R/W
DeviceName
String
7+1
—
—
bq20z90
ASCII
0x22
R/W
DeviceChemistry
String
4+1
—
—
LION
ASCII
0x23
R/W
ManufacturerData
String
14+1
—
—
—
ASCII
0x2f
R/W
Authenticate
String
20+1
—
—
—
ASCII
0x3c
R
CellVoltage4
unsigned int
2
0
65535
—
mV
0x3d
R
CellVoltage3
unsigned int
2
0
65535
—
mV
0x3e
R
CellVoltage2
unsigned int
2
0
65535
—
mV
0x3f
R
CellVoltage1
unsigned int
2
0
65535
—
mV
ASCII
Table 2. EXTENDED SBS COMMANDS
SBS
Cmd
Mode
Name
Format
Size in
Bytes
Min Value
Max Value
Default
Value
Unit
0x45
R
AFEData
String
11+1
—
—
—
ASCII
0x46
R/W
FETControl
hex
1
0x00
0x1e
—
0x4f
R
StateOfHealth
unsigned int
1
0
100
—
0x50
R
SafetyAlert
hex
2
0x0000
0xffff
—
Submit Documentation Feedback
%
11
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SLUS662A – DECEMBER 2005 – REVISED JUNE 2006
Table 2. EXTENDED SBS COMMANDS (continued)
SBS
Cmd
Mode
Name
Format
Size in
Bytes
Min Value
Max Value
Default
Value
Unit
0x51
R
SafetyStatus
hex
2
0x0000
0xffff
—
0x52
R
PFAlert
hex
2
0x0000
0x9fff
—
0x53
R
PFStatus
hex
2
0x0000
0x9fff
—
0x54
R
OperationStatus
hex
2
0x0000
0xf7f7
—
0x55
R
ChargingStatus
hex
2
0x0000
0xffff
—
0x57
R
ResetData
hex
2
0x0000
0xffff
—
0x58
R
WDResetData
unsigned int
2
0
65535
—
0x5a
R
PackVoltage
unsigned int
2
0
65535
---
mV
0x5d
R
AverageVoltage
unsigned int
2
0
65535
—
mV
0x60
R/W
UnSealKey
hex
4
0x00000000
0xffffffff
—
0x61
R/W
FullAccessKey
hex
4
0x00000000
0xffffffff
—
0x62
R/W
PFKey
hex
4
0x00000000
0xffffffff
—
0x63
R/W
AuthenKey3
hex
4
0x00000000
0xffffffff
—
0x64
R/W
AuthenKey2
hex
4
0x00000000
0xffffffff
—
0x65
R/W
AuthenKey1
hex
4
0x00000000
0xffffffff
—
0x66
R/W
AuthenKey0
hex
4
0x00000000
0xffffffff
—
0x70
R/W
ManufacturerInfo
String
8+1
—
—
—
ASCII
0x71
R/W
SenseResistor
unsigned int
2
0
65535
—
µΩ
0x77
R/W
DataFlashSubClassID
hex
2
0x0000
0xffff
—
0x78
R/W
DataFlashSubClassPage1
hex
32
—
—
—
0x79
R/W
DataFlashSubClassPage2
hex
32
—
—
—
0x7a
R/W
DataFlashSubClassPage3
hex
32
—
—
—
0x7b
R/W
DataFlashSubClassPage4
hex
32
—
—
—
0x7c
R/W
DataFlashSubClassPage5
hex
32
—
—
—
0x7d
R/W
DataFlashSubClassPage6
hex
32
—
—
—
0x7e
R/W
DataFlashSubClassPage7
hex
32
—
—
—
0x7f
R/W
DataFlashSubClassPage8
hex
32
—
—
—
NOTE:
All reserved bits in data flash should be set to zero.
Table 3. DATA FLASH VALUES
Class
Subclass
ID
Subclass
Offset
Name
Data
Type
Min
Value
Max Value
Default
Value
Units
1st Level
Safety
0
Voltage
0
COV Threshold
I2
3700
5000
4300
mV
1st Level
Safety
0
Voltage
2
COV Time
U1
0
60
2
s
1st Level
Safety
0
Voltage
3
COV Recovery
I2
0
4400
3900
mV
1st Level
Safety
0
Voltage
5
COV Delta
U1
0
200
20
mV
1st Level
Safety
0
Voltage
6
COV Temp. Hys
U1
0
250
100
0.1°C
1st Level
Safety
0
Voltage
7
POV Threshold
I2
0
18000
17500
mV
1st Level
Safety
0
Voltage
9
POV Time
U1
0
60
2
s
1st Level
Safety
0
Voltage
10
POV Recovery
I2
0
17000
16000
mV
1st Level
Safety
0
Voltage
12
CUV Threshold
I2
0
3500
2200
mV
12
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SLUS662A – DECEMBER 2005 – REVISED JUNE 2006
Table 3. DATA FLASH VALUES (continued)
Class
Subclass
ID
Subclass
Offset
Name
Data
Type
Min
Value
Max Value
Default
Value
Units
1st Level
Safety
0
Voltage
14
CUV Time
U1
0
60
2
s
1st Level
Safety
0
Voltage
15
CUV Recovery
I2
0
3600
3000
mV
1st Level
Safety
0
Voltage
17
PUV Threshold
I2
0
16000
11000
mV
1st Level
Safety
0
Voltage
19
PUV Time
U1
0
60
2
s
1st Level
Safety
0
Voltage
20
PUV Recovery
I2
0
16000
12000
mV
1st Level
Safety
1
Current
0
OC (1st Tier) Chg
I2
0
20000
6000
mA
1st Level
Safety
1
Current
2
OC (1st Tier) Chg Time
U1
0
60
2
s
1st Level
Safety
1
Current
3
OC Chg Recovery
I2
-1000
1000
200
mA
1st Level
Safety
1
Current
5
OC (1st Tier) Dsg
I2
0
20000
6000
mA
1st Level
Safety
1
Current
7
OC (1st Tier) Dsg Time
U1
0
60
2
s
1st Level
Safety
1
Current
8
OC Dsg Recovery
I2
0
1000
200
mA
1st Level
Safety
1
Current
10
OC (2nd Tier) Chg
I2
0
20000
8000
mA
1st Level
Safety
1
Current
12
OC (2nd Tier) Chg Time
U1
0
60
2
s
1st Level
Safety
1
Current
13
OC (2nd Tier) Dsg
I2
0
22000
8000
mA
1st Level
Safety
1
Current
15
OC (2nd Tier) Dsg Time
U1
0
60
2
s
1st Level
Safety
1
Current
16
Current Recovery Time
U1
0
60
8
s
1st Level
Safety
1
Current
17
AFE OC Dsg
H1
0x00
0x1f
0x12
1st Level
Safety
1
Current
18
AFE OC Dsg Time
H1
0x00
0x0f
0x0f
1st Level
Safety
1
Current
19
AFE OC Dsg Recovery
I2
10
1000
5
1st Level
Safety
1
Current
21
AFE SC Chg Cfg
H1
0x00
0xff
0x77
1st Level
Safety
1
Current
22
AFE SC Dsg Cfg
H1
0x00
0xff
0x77
1st Level
Safety
1
Current
23
AFE SC Recovery
I2
0
200
1
mA
1st Level
Safety
2
Temperature
0
Over Temp Chg
I2
0
1200
550
0.1°C
1st Level
Safety
2
Temperature
2
OT Chg Time
U1
0
60
2
s
1st Level
Safety
2
Temperature
3
OT Chg Recovery
I2
0
1200
500
0.1°C
1st Level
Safety
2
Temperature
5
Over Temp Dsg
I2
0
1200
600
0.1°C
1st Level
Safety
2
Temperature
7
OT Dsg Time
U1
0
60
2
s
1st Level
Safety
2
Temperature
8
OT Dsg Recovery
I2
0
1200
550
0.1°C
1st Level
Safety
3
Host Comm
0
Host Watchdog Timeout
U1
0
255
0
s
2nd Level
Safety
16
Voltage
0
SOV Threshold
I2
0
20000
18000
mV
Submit Documentation Feedback
mA
13
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SLUS662A – DECEMBER 2005 – REVISED JUNE 2006
Table 3. DATA FLASH VALUES (continued)
Class
Subclass
ID
Subclass
Offset
Name
Data
Type
Min
Value
Max Value
Default
Value
Units
2nd Level
Safety
16
Voltage
2
SOV Time
U1
0
30
0
s
2nd Level
Safety
16
Voltage
3
Cell Imbalance Current
I1
0
200
5
mA
2nd Level
Safety
16
Voltage
4
Cell Imbalance Fail Voltage
I2
0
5000
1000
mV
2nd Level
Safety
16
Voltage
6
Cell Imbalance Time
U1
0
30
0
s
2nd Level
Safety
16
Voltage
7
Battery Rest Time
U2
0
65535
1800
s
2nd Level
Safety
16
Voltage
9
PFIN Detect Time
U1
0
30
0
s
2nd Level
Safety
17
Current
0
SOC Chg
I2
0
30000
10000
mA
2nd Level
Safety
17
Current
2
SOC Chg Time
U1
0
30
0
s
2nd Level
Safety
17
Current
3
SOC Dsg
I2
0
30000
10000
mA
2nd Level
Safety
17
Current
5
SOC Dsg Time
U1
0
30
0
s
2nd Level
Safety
18
Temperature
0
SOT Chg
I2
0
1200
650
0.1°C
2nd Level
Safety
18
Temperature
2
SOT Chg Time
U1
0
30
0
s
2nd Level
Safety
18
Temperature
3
SOT Dsg
I2
0
1200
750
0.1°C
2nd Level
Safety
18
Temperature
5
SOT Dsg Time
U1
0
30
0
s
2nd Level
Safety
18
Temperature
6
Open Thermistor
I2
-1000
1200
-333
0.1°C
2nd Level
Safety
18
Temperature
8
Open Time
I1
0
30
0
s
2nd Level
Safety
19
FET Verification
0
FET Fail Limit
I2
0
500
20
mA
2nd Level
Safety
19
FET Verification
2
FET Fail Time
U1
0
30
0
s
2nd Level
Safety
20
AFE Verification
0
AFE Check Time
U1
0
255
0
s
2nd Level
Safety
20
AFE Verification
1
AFE Fail Limit
U1
0
255
10
2nd Level
Safety
20
AFE Verification
2
AFE Fail Recovery Time
U1
0
255
20
2nd Level
Safety
20
AFE Verification
3
AFE Init Retry Limit
U1
0
255
6
2nd Level
Safety
20
AFE Verification
4
AFE Init Limit
U1
0
255
20
2nd Level
Safety
21
Fuse Verification
0
Fuse Fail Limit
I2
0
20
2
mA
2nd Level
Safety
21
Fuse Verification
2
Fuse Fail Time
U1
0
30
0
s
Charge Control
32
Charge Inhibit Cfg
0
Chg Inhibit Temp Low
I2
-400
1200
0
0.1°C
Charge Control
32
Charge Inhibit Cfg
2
Chg Inhibit Temp High
I2
-400
1200
450
0.1°C
Charge Control
32
Charge Inhibit Cfg
4
Temp Hys
I2
0
100
10
0.1°C
Charge Control
33
Pre-Charge Cfg
0
Pre-chg Current
I2
0
2000
250
mA
Charge Control
33
Pre-Charge Cfg
2
Pre-chg Temp
I2
-400
1200
120
0.1°C
Charge Control
33
Pre-Charge Cfg
4
Pre-chg Voltage
I2
0
20000
3000
mV
Charge Control
33
Pre-Charge Cfg
6
Recovery Voltage
I2
0
20000
3100
mV
Charge Control
34
Fast Charge Cfg
0
Fast Charge Current
I2
0
10000
4000
mA
Charge Control
34
Fast Charge Cfg
2
Charging Voltage
I2
0
20000
16800
mV
14
Submit Documentation Feedback
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SLUS662A – DECEMBER 2005 – REVISED JUNE 2006
Table 3. DATA FLASH VALUES (continued)
Class
Subclass
ID
Subclass
Offset
Name
Data
Type
Min
Value
Max Value
Default
Value
Units
Charge Control
34
Fast Charge Cfg
4
Delta Temp
I2
0
500
50
0.1°C
Charge Control
34
Fast Charge Cfg
6
Suspend Low Temp
I2
-400
1200
-50
0.1°C
Charge Control
34
Fast Charge Cfg
8
Suspend High Temp
I2
-400
1200
550
0.1°C
Charge Control
35
Pulse Charge Cfg
0
Turn ON Voltage
I2
0
5000
4150
mV
Charge Control
35
Pulse Charge Cfg
2
Turn OFF Voltage
I2
0
5000
4250
mV
Charge Control
35
Pulse Charge Cfg
4
Max ON Pulse Time
U1
0
240
240
Seconds/4
Charge Control
35
Pulse Charge Cfg
5
Min OFF Pulse Time
U1
0
240
0
Seconds/4
Charge Control
35
Pulse Charge Cfg
6
Max OFF Voltage
I2
0
5000
4270
mV
Charge Control
36
Termination Cfg.
0
Maintenance Current
I2
0
1000
0
mA
Charge Control
36
Termination Cfg.
2
Taper Current
I2
0
1000
250
mA
Charge Control
36
Termination Cfg.
6
Taper Voltage
I2
0
1000
300
mV
Charge Control
36
Termination Cfg.
8
Current Taper Window
U1
0
60
40
s
Charge Control
36
Termination Cfg.
9
TCA Set %
I1
-1
100
-1
%
Charge Control
36
Termination Cfg.
10
TCA Clear %
I1
-1
100
95
%
Charge Control
36
Termination Cfg.
11
FC Set %
I1
-1
100
-1
%
Charge Control
36
Termination Cfg.
12
FC Clear %
I1
-1
100
98
%
Charge Control
37
Cell Balancing Cfg
0
Min Cell Deviation
U2
0
65535
1750
s/mAh
Charge Control
38
Charging Faults
0
Over Charging Voltage
I2
0
3000
500
mV
Charge Control
38
Charging Faults
2
Over Charging Volt Time
U1
0
60
2
s
Charge Control
38
Charging Faults
3
Over Charging Current
I2
0
2000
500
mA
Charge Control
38
Charging Faults
5
Over Charging Curr Time
U1
0
60
2
s
Charge Control
38
Charging Faults
6
Over Charging Curr Recov
I2
0
2000
100
mA
Charge Control
38
Charging Faults
8
Depleted Voltage
I2
0
16000
8000
mV
Charge Control
38
Charging Faults
10
Depleted Voltage Time
U1
0
60
2
s
Charge Control
38
Charging Faults
11
Depleted Recovery
I2
0
16000
8500
mV
Charge Control
38
Charging Faults
13
Over Charge Capacity
I2
0
4000
300
mAh
Charge Control
38
Charging Faults
15
Over Charge Recovery
I2
0
100
2
mAh
Charge Control
38
Charging Faults
17
FC-MTO
U2
0
65535
10800
s
Charge Control
38
Charging Faults
19
PC-MTO
U2
0
65535
3600
s
Charge Control
38
Charging Faults
21
Charge Fault Cfg
H1
0x00
0x3f
0x00
SBS
Configuration
48
Data
0
Rem Cap Alarm
I2
0
700
300
mAh
SBS
Configuration
48
Data
2
Rem Energy Alarm
I2
0
1000
432
10mW
SBS
Configuration
48
Data
4
Rem Time Alarm
U2
0
30
10
min
SBS
Configuration
48
Data
6
Init Battery Mode
H2
0x0000
0xffff
0x0081
SBS
Configuration
48
Data
8
Design Voltage
I2
7000
18000
14400
SBS
Configuration
48
Data
10
Spec Info
H2
0x0000
0xffff
0x0031
SBS
Configuration
48
Data
12
Manuf Date
U2
0
65535
0
SBS
Configuration
48
Data
14
Ser. Num.
H2
0x0000
0xffff
0x0001
SBS
Configuration
48
Data
16
Cycle Count
U2
0
65535
0
Count
SBS
Configuration
48
Data
18
CC Threshold
I2
100
32767
4400
mAh
SBS
Configuration
48
Data
20
CC %
U1
0
100
90
%
Submit Documentation Feedback
mV
Day +
Mo*32 +
(Yr
1980)*256
15
bq20z90
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SLUS662A – DECEMBER 2005 – REVISED JUNE 2006
Table 3. DATA FLASH VALUES (continued)
Class
Subclass
ID
Subclass
Offset
Name
Data
Type
Min
Value
Max Value
Default
Value
Units
SBS
Configuration
48
Data
21
CF MaxError Limit
U1
0
100
100
%
SBS
Configuration
48
Data
22
Design Capacity
I2
0
65535
4400
mAh
SBS
Configuration
48
Data
24
Design Energy
I2
0
65535
6336
10mW
SBS
Configuration
48
Data
26
Manuf Name
S12
-
-
Texas Inst.
ASCII
SBS
Configuration
48
Data
38
Device Name
S8
-
-
bq20z90
ASCII
SBS
Configuration
48
Data
46
Device Chemistry
S5
-
-
LION
ASCII
SBS
Configuration
49
Configuration
0
TDA Set %
I1
-1
100
6
%
SBS
Configuration
49
Configuration
1
TDA Clear %
I1
-1
100
8
%
SBS
Configuration
49
Configuration
2
FD Set %
I1
-1
100
2
%
SBS
Configuration
49
Configuration
3
FD Clear %
I1
-1
100
5
%
SBS
Configuration
49
Configuration
4
TDA Set Volt Threshold
I2
0
16800
5000
mV
SBS
Configuration
49
Configuration
6
TDA Set Volt Time
U1
0
60
5
s
SBS
Configuration
49
Configuration
7
TDA Clear Volt
I2
0
16800
5500
mV
SBS
Configuration
49
Configuration
9
FD Set Volt Threshold
I2
0
16800
5000
mV
SBS
Configuration
49
Configuration
11
FD Volt Time
U1
0
60
5
s
SBS
Configuration
49
Configuration
12
FD Clear Volt
I2
0
16800
5500
mV
System Data
56
Manufacturer Data
0
Pack Lot Code
H2
0x0000
0xffff
0x0000
System Data
56
Manufacturer Data
2
PCB Lot Code
H2
0x0000
0xffff
0x0000
System Data
56
Manufacturer Data
4
Firmware Version
H2
0x0000
0xffff
0x0000
System Data
56
Manufacturer Data
6
Hardware Revision
H2
0x0000
0xffff
0x0000
System Data
56
Manufacturer Data
8
Cell Revision
H2
0x0000
0xffff
0x0000
System Data
58
Manufacturer Info
0
Manuf. Info
S9
-
-
12345678
System Data
59
Lifetime Data
0
Lifetime Max Temp
I2
0
1400
300
0.1°C
System Data
59
Lifetime Data
2
Lifetime Min Temp
I2
-600
1400
200
0.1°C
System Data
59
Lifetime Data
4
Lifetime Max Cell Voltage
I2
0
32767
3500
mV
System Data
59
Lifetime Data
6
Lifetime Min Cell Voltage
I2
0
32767
3200
mV
System Data
59
Lifetime Data
8
Lifetime Max Pack Voltage
I2
0
32767
14000
mV
System Data
59
Lifetime Data
10
Lifetime Min Pack Voltage
I2
0
32767
12800
mV
System Data
59
Lifetime Data
12
Lifetime Max Chg Current
I2
-32768
32767
1500
mA
System Data
59
Lifetime Data
14
Lifetime Max Dsg Current
I2
-32768
32767
-3000
mA
System Data
59
Lifetime Data
16
Lifetime Max Chg Power
I2
-32768
32767
1500
cWatt
System Data
59
Lifetime Data
18
Lifetime Max Dsg Power
I2
-32768
32767
-1500
cWatt
System Data
59
Lifetime Data
22
Life Max AvgDsg Cur
I2
-32768
32767
-1000
mA
System Data
59
Lifetime Data
26
Life Max AvgDsg Pow
I2
-32768
32767
-1500
cW
System Data
59
Lifetime Data
28
Lifetime Avg Temp
I2
-40
1400
250
0.1°C
System Data
60
Lifetime Temp
Samples
0
LT Temp Samples
I4
0
140000000
0
Count
Configuration
64
Registers
0
Operation Cfg A
H2
0x0000
0xffff
0x0f29
Configuration
64
Registers
2
Operation Cfg B
H2
0x0000
0xffff
0x6440
Configuration
64
Registers
4
Operation Cfg C
H2
0x0000
0xffff
0x0000
16
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SLUS662A – DECEMBER 2005 – REVISED JUNE 2006
Table 3. DATA FLASH VALUES (continued)
Class
Subclass
ID
Subclass
Offset
Name
Data
Type
Min
Value
Max Value
Default
Value
Configuration
64
Registers
6
Permanent Fail Cfg
H2
0x0000
0xffff
0x0000
Configuration
64
Registers
8
Non-Removable Cfg
H2
0x0000
0xffff
0x0000
LED Support
67
LED Cfg
0
LED Flash Rate
U2
0
65535
512
500us
LED Support
67
LED Cfg
2
LED Blink Rate
U2
0
65535
1024
500us
LED Support
67
LED Cfg
4
LED Delay
U2
1
65535
100
500us
LED Support
67
LED Cfg
6
LED Hold Time
U1
0
255
4
sec
LED Support
67
LED Cfg
7
CHG Flash Alarm
I1
-1
101
10
%
LED Support
67
LED Cfg
8
CHG Thresh 1
I1
-1
101
0
%
LED Support
67
LED Cfg
9
CHG Thresh 2
I1
-1
101
20
%
LED Support
67
LED Cfg
10
CHG Thresh 3
I1
-1
101
40
%
LED Support
67
LED Cfg
11
CHG Thresh 4
I1
-1
101
60
%
LED Support
67
LED Cfg
12
CHG Thresh 5
I1
-1
101
80
%
LED Support
67
LED Cfg
13
DSG Flash Alarm
I1
-1
101
10
%
LED Support
67
LED Cfg
14
DSG Thresh 1
I1
-1
101
0
%
LED Support
67
LED Cfg
15
DSG Thresh 2
I1
-1
101
20
%
LED Support
67
LED Cfg
16
DSG Thresh 3
I1
-1
101
40
%
LED Support
67
LED Cfg
17
DSG Thresh 4
I1
-1
101
60
%
LED Support
67
LED Cfg
18
DSG Thresh 5
I1
-1
101
80
%
LED Support
67
LED Cfg
19
Sink Current
U1
0
3
3
Power
68
Power
0
Flash Update OK Voltage
I2
6000
20000
7500
mV
Power
68
Power
2
Shutdown Voltage
I2
5000
20000
7000
mV
Power
68
Power
4
Shutdown Time
U1
0
60
10
s
Power
68
Power
5
Charger Present
I2
0
23000
3000
mV
Power
68
Power
7
Sleep Current
I2
0
100
10
mA
Power
68
Power
9
Bus Low Time
U1
0
255
5
s
Power
68
Power
10
Cal Inhibit Temp Low
I2
-400
1200
50
0.1°C
Power
68
Power
12
Cal Inhibit Temp High
I2
-400
1200
450
0.1°C
Power
68
Power
14
Sleep Voltage Time
U1
0
100
5
s
Power
68
Power
15
Sleep Current Time
U1
0
255
20
s
Power
68
Power
16
Wake Current Reg
H1
0x00
0x07
0x00
Gas Gauging
80
IT Cfg
0
Load Select
U1
0
255
3
Gas Gauging
80
IT Cfg
1
Load Mode
U1
0
255
0
Gas Gauging
80
IT Cfg
45
Term Voltage
I2
-32768
32767
12000
mV
Gas Gauging
80
IT Cfg
60
User Rate-mA
I2
2000
9000
0
mA
Gas Gauging
80
IT Cfg
62
User Rate-mW
I2
3000
14000
0
10mW
Gas Gauging
80
IT Cfg
64
Reserve Cap-mAh
I2
0
9000
0
mAh
Gas Gauging
80
IT Cfg
66
Reserve Cap-mWh
I2
0
14000
0
10mWh
Gas Gauging
81
Current
Thresholds
0
Dsg Current Threshold
I2
0
2000
100
mA
Gas Gauging
81
Current
Thresholds
2
Chg Current Threshold
I2
0
2000
50
mA
Gas Gauging
81
Current
Thresholds
4
Quit Current
I2
0
1000
10
mA
Gas Gauging
81
Current
Thresholds
6
Dsg Relax Time
U1
0
255
1
s
Gas Gauging
81
Current
Thresholds
7
Chg Relax Time
U1
0
255
60
s
Gas Gauging
82
State
0
Qmax Cell 0
I2
0
32767
4400
mAh
Gas Gauging
82
State
2
Qmax Cell 1
I2
0
32767
4400
mAh
Gas Gauging
82
State
4
Qmax Cell 2
I2
0
32767
4400
mAh
Gas Gauging
82
State
6
Qmax Cell 3
I2
0
32767
4400
mAh
Gas Gauging
82
State
8
Qmax Pack
I2
0
32767
4400
mAh
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SLUS662A – DECEMBER 2005 – REVISED JUNE 2006
Table 3. DATA FLASH VALUES (continued)
Class
Subclass
ID
Subclass
Offset
Name
Data
Type
Min
Value
Max Value
Default
Value
Gas Gauging
82
State
12
Update Status
H1
0x00
0x03
0x00
Gas Gauging
82
State
21
Avg I Last Run
I2
-32768
32767
-2000
mA
Gas Gauging
82
State
23
Avg P Last Run
I2
-32768
32767
-3022
cWatt
Gas Gauging
82
State
25
Delta Voltage
I2
-32768
32767
0
mV
Ra Table
88
R_a0
0
Cell0 R_a flag
H2
0x0000
0x0000
0xff55
Ra Table
88
R_a0
2
Cell0 R_a 0
I2
183
183
160
2^-10Ω
Ra Table
88
R_a0
4
Cell0 R_a 1
I2
181
181
166
2^-10Ω
Ra Table
88
R_a0
6
Cell0 R_a 2
I2
198
198
153
2^-10Ω
Ra Table
88
R_a0
8
Cell0 R_a 3
I2
244
244
151
2^-10Ω
Ra Table
88
R_a0
10
Cell0 R_a 4
I2
254
254
145
2^-10Ω
Ra Table
88
R_a0
12
Cell0 R_a 5
I2
261
261
152
2^-10Ω
Ra Table
88
R_a0
14
Cell0 R_a 6
I2
333
333
176
2^-10Ω
Ra Table
88
R_a0
16
Cell0 R_a 7
I2
338
338
204
2^-10Ω
Ra Table
88
R_a0
18
Cell0 R_a 8
I2
345
345
222
2^-10Ω
Ra Table
88
R_a0
20
Cell0 R_a 9
I2
350
350
254
2^-10Ω
Ra Table
88
R_a0
22
Cell0 R_a 10
I2
382
382
315
2^-10Ω
Ra Table
88
R_a0
24
Cell0 R_a 11
I2
429
429
437
2^-10Ω
Ra Table
88
R_a0
26
Cell0 R_a 12
I2
502
502
651
2^-10Ω
Ra Table
88
R_a0
28
Cell0 R_a 13
I2
545
545
1001
2^-10Ω
Ra Table
88
R_a0
30
Cell0 R_a 14
I2
366
366
1458
2^-10Ω
Ra Table
89
R_a1
0
Cell1 R_a flag
H2
0x0000
0x0000
0xff55
Ra Table
89
R_a1
2
Cell1 R_a 0
I2
183
183
160
2^-10Ω
Ra Table
89
R_a1
4
Cell1 R_a 1
I2
181
181
166
2^-10Ω
Ra Table
89
R_a1
6
Cell1 R_a 2
I2
198
198
153
2^-10Ω
Ra Table
89
R_a1
8
Cell1 R_a 3
I2
244
244
151
2^-10Ω
Ra Table
89
R_a1
10
Cell1 R_a 4
I2
254
254
145
2^-10Ω
Ra Table
89
R_a1
12
Cell1 R_a 5
I2
261
261
152
2^-10Ω
Ra Table
89
R_a1
14
Cell1 R_a 6
I2
333
333
176
2^-10Ω
Ra Table
89
R_a1
16
Cell1 R_a 7
I2
338
338
204
2^-10Ω
Ra Table
89
R_a1
18
Cell1 R_a 8
I2
345
345
222
2^-10Ω
Ra Table
89
R_a1
20
Cell1 R_a 9
I2
350
350
254
2^-10Ω
Ra Table
89
R_a1
22
Cell1 R_a 10
I2
382
382
315
2^-10Ω
Ra Table
89
R_a1
24
Cell1 R_a 11
I2
429
429
437
2^-10Ω
Ra Table
89
R_a1
26
Cell1 R_a 12
I2
502
502
651
2^-10Ω
Ra Table
89
R_a1
28
Cell1 R_a 13
I2
545
545
1001
2^-10Ω
Ra Table
89
R_a1
30
Cell1 R_a 14
I2
366
366
1458
2^-10Ω
Ra Table
90
R_a2
0
Cell2 R_a flag
H2
0x0000
0x0000
0xff55
Ra Table
90
R_a2
2
Cell2 R_a 0
I2
183
183
160
2^-10Ω
Ra Table
90
R_a2
4
Cell2 R_a 1
I2
181
181
166
2^-10Ω
Ra Table
90
R_a2
6
Cell2 R_a 2
I2
198
198
153
2^-10Ω
Ra Table
90
R_a2
8
Cell2 R_a 3
I2
244
244
151
2^-10Ω
Ra Table
90
R_a2
10
Cell2 R_a 4
I2
254
254
145
2^-10Ω
Ra Table
90
R_a2
12
Cell2 R_a 5
I2
261
261
152
2^-10Ω
Ra Table
90
R_a2
14
Cell2 R_a 6
I2
333
333
176
2^-10Ω
Ra Table
90
R_a2
16
Cell2 R_a 7
I2
338
338
204
2^-10Ω
Ra Table
90
R_a2
18
Cell2 R_a 8
I2
345
345
222
2^-10Ω
Ra Table
90
R_a2
20
Cell2 R_a 9
I2
350
350
254
2^-10Ω
Ra Table
90
R_a2
22
Cell2 R_a 10
I2
382
382
315
2^-10Ω
Ra Table
90
R_a2
24
Cell2 R_a 11
I2
429
429
437
2^-10Ω
Ra Table
90
R_a2
26
Cell2 R_a 12
I2
502
502
651
2^-10Ω
18
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SLUS662A – DECEMBER 2005 – REVISED JUNE 2006
Table 3. DATA FLASH VALUES (continued)
Class
Subclass
ID
Subclass
Offset
Name
Data
Type
Min
Value
Max Value
Default
Value
Units
Ra Table
90
R_a2
28
Cell2 R_a 13
I2
545
545
1001
2^-10Ω
Ra Table
90
R_a2
30
Cell2 R_a 14
I2
366
366
1458
2^-10Ω
Ra Table
91
R_a3
0
Cell3 R_a flag
H2
0x0
0x0
0xff55
Ra Table
91
R_a3
2
Cell3 R_a 0
I2
183
183
160
2^-10Ω
Ra Table
91
R_a3
4
Cell3 R_a 1
I2
181
181
166
2^-10Ω
Ra Table
91
R_a3
6
Cell3 R_a 2
I2
198
198
153
2^-10Ω
Ra Table
91
R_a3
8
Cell3 R_a 3
I2
244
244
151
2^-10Ω
Ra Table
91
R_a3
10
Cell3 R_a 4
I2
254
254
145
2^-10Ω
Ra Table
91
R_a3
12
Cell3 R_a 5
I2
261
261
152
2^-10Ω
Ra Table
91
R_a3
14
Cell3 R_a 6
I2
333
333
176
2^-10Ω
Ra Table
91
R_a3
16
Cell3 R_a 7
I2
338
338
204
2^-10Ω
Ra Table
91
R_a3
18
Cell3 R_a 8
I2
345
345
222
2^-10Ω
Ra Table
91
R_a3
20
Cell3 R_a 9
I2
350
350
254
2^-10Ω
Ra Table
91
R_a3
22
Cell3 R_a 10
I2
382
382
315
2^-10Ω
Ra Table
91
R_a3
24
Cell3 R_a 11
I2
429
429
437
2^-10Ω
Ra Table
91
R_a3
26
Cell3 R_a 12
I2
502
502
651
2^-10Ω
Ra Table
91
R_a3
28
Cell3 R_a 13
I2
545
545
1001
2^-10Ω
Ra Table
91
R_a3
30
Cell3 R_a 14
I2
366
366
1458
2^-10Ω
Ra Table
92
R_a0x
0
xCell0 R_a flag
H2
0xffff
0xffff
0xffff
Ra Table
92
R_a0x
2
xCell0 R_a 0
I2
183
183
160
2^-10Ω
Ra Table
92
R_a0x
4
xCell0 R_a 1
I2
181
181
166
2^-10Ω
Ra Table
92
R_a0x
6
xCell0 R_a 2
I2
198
198
153
2^-10Ω
Ra Table
92
R_a0x
8
xCell0 R_a 3
I2
244
244
151
2^-10Ω
Ra Table
92
R_a0x
10
xCell0 R_a 4
I2
254
254
145
2^-10Ω
Ra Table
92
R_a0x
12
xCell0 R_a 5
I2
261
261
152
2^-10Ω
Ra Table
92
R_a0x
14
xCell0 R_a 6
I2
333
333
176
2^-10Ω
Ra Table
92
R_a0x
16
xCell0 R_a 7
I2
338
338
204
2^-10Ω
Ra Table
92
R_a0x
18
xCell0 R_a 8
I2
345
345
222
2^-10Ω
Ra Table
92
R_a0x
20
xCell0 R_a 9
I2
350
350
254
2^-10Ω
Ra Table
92
R_a0x
22
xCell0 R_a 10
I2
382
382
315
2^-10Ω
Ra Table
92
R_a0x
24
xCell0 R_a 11
I2
429
429
437
2^-10Ω
Ra Table
92
R_a0x
26
xCell0 R_a 12
I2
502
502
651
2^-10Ω
Ra Table
92
R_a0x
28
xCell0 R_a 13
I2
545
545
1001
2^-10Ω
Ra Table
92
R_a0x
30
xCell0 R_a 14
I2
366
366
1458
2^-10Ω
Ra Table
93
R_a1x
0
xCell1 R_a flag
H2
0xffff
0xffff
0xffff
Ra Table
93
R_a1x
2
xCell1 R_a 0
I2
183
183
160
2^-10Ω
Ra Table
93
R_a1x
4
xCell1 R_a 1
I2
181
181
166
2^-10Ω
Ra Table
93
R_a1x
6
xCell1 R_a 2
I2
198
198
153
2^-10Ω
Ra Table
93
R_a1x
8
xCell1 R_a 3
I2
244
244
151
2^-10Ω
Ra Table
93
R_a1x
10
xCell1 R_a 4
I2
254
254
145
2^-10Ω
Ra Table
93
R_a1x
12
xCell1 R_a 5
I2
261
261
152
2^-10Ω
Ra Table
93
R_a1x
14
xCell1 R_a 6
I2
333
333
176
2^-10Ω
Ra Table
93
R_a1x
16
xCell1 R_a 7
I2
338
338
204
2^-10Ω
Ra Table
93
R_a1x
18
xCell1 R_a 8
I2
345
345
222
2^-10Ω
Ra Table
93
R_a1x
20
xCell1 R_a 9
I2
350
350
254
2^-10Ω
Ra Table
93
R_a1x
22
xCell1 R_a 10
I2
382
382
315
2^-10Ω
Ra Table
93
R_a1x
24
xCell1 R_a 11
I2
429
429
437
2^-10Ω
Ra Table
93
R_a1x
26
xCell1 R_a 12
I2
502
502
651
2^-10Ω
Ra Table
93
R_a1x
28
xCell1 R_a 13
I2
545
545
1001
2^-10Ω
Ra Table
93
R_a1x
30
xCell1 R_a 14
I2
366
366
1458
2^-10Ω
Submit Documentation Feedback
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SLUS662A – DECEMBER 2005 – REVISED JUNE 2006
Table 3. DATA FLASH VALUES (continued)
Class
Subclass
ID
Subclass
Offset
Name
Data
Type
Min
Value
Max Value
Default
Value
Ra Table
94
R_a2x
0
xCell2 R_a flag
H2
0xffff
0xffff
0xffff
Ra Table
94
R_a2x
2
xCell2 R_a 0
I2
183
183
160
2^-10Ω
Ra Table
94
R_a2x
4
xCell2 R_a 1
I2
181
181
166
2^-10Ω
Ra Table
94
R_a2x
6
xCell2 R_a 2
I2
198
198
153
2^-10Ω
Ra Table
94
R_a2x
8
xCell2 R_a 3
I2
244
244
151
2^-10Ω
Ra Table
94
R_a2x
10
xCell2 R_a 4
I2
254
254
145
2^-10Ω
Ra Table
94
R_a2x
12
xCell2 R_a 5
I2
261
261
152
2^-10Ω
Ra Table
94
R_a2x
14
xCell2 R_a 6
I2
333
333
176
2^-10Ω
Ra Table
94
R_a2x
16
xCell2 R_a 7
I2
338
338
204
2^-10Ω
Ra Table
94
R_a2x
18
xCell2 R_a 8
I2
345
345
222
2^-10Ω
Ra Table
94
R_a2x
20
xCell2 R_a 9
I2
350
350
254
2^-10Ω
Ra Table
94
R_a2x
22
xCell2 R_a 10
I2
382
382
315
2^-10Ω
Ra Table
94
R_a2x
24
xCell2 R_a 11
I2
429
429
437
2^-10Ω
Ra Table
94
R_a2x
26
xCell2 R_a 12
I2
502
502
651
2^-10Ω
Ra Table
94
R_a2x
28
xCell2 R_a 13
I2
545
545
1001
2^-10Ω
Ra Table
94
R_a2x
30
xCell2 R_a 14
I2
366
366
1458
2^-10Ω
Ra Table
95
R_a3x
0
xCell3 R_a flag
H2
0xffff
0xffff
0xffff
Ra Table
95
R_a3x
2
xCell3 R_a 0
I2
183
183
160
2^-10Ω
Ra Table
95
R_a3x
4
xCell3 R_a 1
I2
181
181
166
2^-10Ω
Ra Table
95
R_a3x
6
xCell3 R_a 2
I2
198
198
153
2^-10Ω
Ra Table
95
R_a3x
8
xCell3 R_a 3
I2
244
244
151
2^-10Ω
Ra Table
95
R_a3x
10
xCell3 R_a 4
I2
254
254
145
2^-10Ω
Ra Table
95
R_a3x
12
xCell3 R_a 5
I2
261
261
152
2^-10Ω
Ra Table
95
R_a3x
14
xCell3 R_a 6
I2
333
333
176
2^-10Ω
Ra Table
95
R_a3x
16
xCell3 R_a 7
I2
338
338
204
2^-10Ω
Ra Table
95
R_a3x
18
xCell3 R_a 8
I2
345
345
222
2^-10Ω
Ra Table
95
R_a3x
20
xCell3 R_a 9
I2
350
350
254
2^-10Ω
Ra Table
95
R_a3x
22
xCell3 R_a 10
I2
382
382
315
2^-10Ω
Ra Table
95
R_a3x
24
xCell3 R_a 11
I2
429
429
437
2^-10Ω
Ra Table
95
R_a3x
26
xCell3 R_a 12
I2
502
502
651
2^-10Ω
Ra Table
95
R_a3x
28
xCell3 R_a 13
I2
545
545
1001
2^-10Ω
Ra Table
95
R_a3x
30
xCell3 R_a 14
I2
366
366
1458
2^-10Ω
PF Status
96
Device Status
Data
0
PF Flags 1
H2
0x0000
0x6fff
0x0000
PF Status
96
Device Status
Data
2
Fuse Flag
H2
0x0000
0xffff
0x0000
PF Status
96
Device Status
Data
4
PF Voltage
I2
0
32767
0
mV
PF Status
96
Device Status
Data
6
PF C4 Voltage
I2
0
9999
0
mV
PF Status
96
Device Status
Data
8
PF C3 Voltage
I2
0
9999
0
mV
PF Status
96
Device Status
Data
10
PF C2 Voltage
I2
0
9999
0
mV
PF Status
96
Device Status
Data
12
PF C1 Voltage
I2
0
9999
0
mV
PF Status
96
Device Status
Data
14
PF Current
I2
-32768
32767
0
mA
PF Status
96
Device Status
Data
16
PF Temperature
I2
-9999
9999
0
0.1 K
PF Status
96
Device Status
Data
18
PF Batt Stat
H2
0x0000
0xffff
0x0000
PF Status
96
Device Status
Data
20
PF RC-mAh
I2
0
32767
0
20
Submit Documentation Feedback
Units
mAh
bq20z90
www.ti.com
SLUS662A – DECEMBER 2005 – REVISED JUNE 2006
Table 3. DATA FLASH VALUES (continued)
Class
Subclass
ID
Subclass
Offset
Name
Data
Type
Min
Value
Max Value
Default
Value
Units
PF Status
96
Device Status
Data
22
PF RC-10mWh
I2
0
32767
0
cWattHr
PF Status
96
Device Status
Data
24
PF Chg Status
H2
0x0000
0xffff
0x0000
PF Status
96
Device Status
Data
26
PF Safety Status
H2
0x0000
0xffff
0x0000
PF Status
96
Device Status
Data
28
PF Flags 2
H2
0x0000
0x8000
0x0000
PF Status
97
AFE Regs
0
AFE Status
H1
0x00
0xff
0x00
PF Status
97
AFE Regs
1
AFE Output
H1
0x00
0xff
0x00
PF Status
97
AFE Regs
2
AFE State
H1
0x00
0xff
0x00
PF Status
97
AFE Regs
3
AFE Function
H1
0x00
0xff
0x00
PF Status
97
AFE Regs
4
AFE Cell Select
H1
0x00
0xff
0x00
PF Status
97
AFE Regs
5
AFE OLV
H1
0x00
0xff
0x00
PF Status
97
AFE Regs
6
AFE OLT
H1
0x00
0xff
0x00
PF Status
97
AFE Regs
7
AFE SCC
H1
0x00
0xff
0x00
PF Status
97
AFE Regs
8
AFE SCD
H1
0x00
0xff
0x00
Calibration
104
Data
0
CC Gain
F4
0.1
4
0.9419
Calibration
104
Data
4
CC Delta
F4
29826
1193046
280932.6
Calibration
104
Data
8
Ref Voltage
I2
0
32767
24500
50µV
Calibration
104
Data
12
AFE Pack Gain
I2
0
32767
22050
µV/cnt
Calibration
104
Data
14
CC Offset
I2
-32768
32767
-1667
Calibration
104
Data
16
Board Offset
I2
-32767
32767
0
Calibration
104
Data
18
Int Temp Offset
I1
-128
127
0
Calibration
104
Data
19
Ext1 Temp Offset
I1
-128
127
0
Calibration
104
Data
20
Ext2 Temp Offset
I1
-128
127
0
Calibration
105
Config
0
CC Current
I2
0
32767
3000
mA
Calibration
105
Config
2
Voltage Signal
I2
0
32767
16800
mV
Calibration
105
Config
4
Temp Signal
I2
0
32767
2980
0.1°C
Calibration
105
Config
6
CC Offset Time
U2
0
65535
250
ms
Calibration
105
Config
8
ADC Offset Time
U2
0
65535
32
ms
Calibration
105
Config
10
CC Gain Time
U2
0
65535
250
ms
Calibration
105
Config
12
Voltage Time
U2
0
65535
1984
ms
Calibration
105
Config
14
Temperature Time
U2
0
65535
32
s
Calibration
105
Config
17
Cal Mode Timeout
U2
0
65535
38400
1/128 s
Calibration
106
Temp Model
0
Ext Coef 1
I2
-32768
32767
-28285
s
Calibration
106
Temp Model
2
Ext Coef 2
I2
-32768
32767
20848
s
Calibration
106
Temp Model
4
Ext Coef 3
I2
-32768
32767
-7537
s
Calibration
106
Temp Model
6
Ext Coef 4
I2
-32768
32767
4012
s
Calibration
106
Temp Model
8
Ext Min AD
I2
-32768
32767
0
s
Calibration
106
Temp Model
10
Ext Max Temp
I2
-32768
32767
4012
s
Calibration
106
Temp Model
12
Int Coef 1
I2
-32768
32767
0
s
Calibration
106
Temp Model
14
Int Coef 2
I2
-32768
32767
0
s
Calibration
106
Temp Model
16
Int Coef 3
I2
-32768
32767
-11136
s
Calibration
106
Temp Model
18
Int Coef 4
I2
-32768
32767
5754
s
Calibration
106
Temp Model
20
Int Min AD
I2
-32768
32767
0
s
Calibration
106
Temp Model
22
Int Max Temp
I2
-32768
32767
5754
s
Calibration
107
Current
0
Filter
U1
0
255
239
Calibration
107
Current
1
Deadband
U1
0
255
3
mA
Calibration
107
Current
2
CC Deadband
U1
0
255
34
294 nV
Submit Documentation Feedback
21
PACKAGE OPTION ADDENDUM
www.ti.com
10-Dec-2020
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
(4/5)
(6)
BQ20Z90DBT
ACTIVE
TSSOP
DBT
30
60
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 85
20Z90DBT
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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