bq20z40 www.ti.com................................................................................................................................................ SLUS801A – FEBRUARY 2009 – REVISED MARCH 2009 SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK™ TECHNOLOGY FOR USE WITH THE bq29330 FEATURES 1 • Next Generation Patented Impedance Track™ Technology Accurately Measures Available Charge in Li-Ion and Li-Polymer Batteries – Better Than 1% Error Over the Lifetime of the Battery • Supports the Smart Battery Specification SBS V1.1 • Flexible Configuration for 2 to 4 Series Li-Ion and Li-Polymer Cells • Powerful 8-Bit RISC CPU With Ultralow Power Modes • Full Array of Programmable Protection Features – Voltage, Current, and Temperature • Satisfies JEITA Guidelines • Added Flexibility to Handle More Complex Charging Profiles • Lifetime Data Logging • Supports SHA-1 Authentication • Available in a 20-Pin TSSOP (PW) package 2 DESCRIPTION The bq20z40 SBS-compliant gas gauge and protection IC, incorporating patented Impedance Track™ technology, is designed for battery-pack or in-system installation. The bq20z40 measures and maintains an accurate record of available charge in Li-ion or Li-polymer batteries using its integrated high-performance analog peripherals. The bq20z40 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 maximizes functionality and safety while minimizing external 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 the remaining capacity to be calculated with discharge rate, temperature, and cell aging that are all accounted for during each stage of every cycle. APPLICATIONS • • • Notebook PCs Medical and Test Equipment Portable Instrumentation AVAILABLE OPTIONS TA –40°C to 85°C (1) (2) PACKAGE 20-PIN TSSOP (PW) Tube bq20z40PW (1) 20-PIN TSSOP (PW) Tape & Reel bq20z40PWR (2) A single tube quantity is 50 units. A single reel quantity is 2000 units 1 2 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 © 2009, Texas Instruments Incorporated bq20z40 SLUS801A – FEBRUARY 2009 – REVISED MARCH 2009................................................................................................................................................ 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 + Fuse Supply Voltage Reset 32KHz SBS v1.1 Data System Interface N-CH FET Drive Watchdog & Protection Timing Charge Pumps Registers Alert System Interface I2C SHA-1 Authentication Overvoltage & Undervoltage Protection Cell & Pack Voltage Measurement Voltage Level Translator Cell Balancing Algorithm & Control Overrcurrent Protection Impedance Track™ Gas Gauging Overcurrent & Short Circuit Protection bq20z40 bq29330 nd bq29330 Validation & Control SMBus LDO & Therm. Drive & Reset 2 Level Voltage Protection 32kHz Clock Generator Therm Cell Selection Multiplexer Charging Algorithm Temperature Measurement & Protection Cell Balancing Drive Fail Safe Protection bq294xy Pack RSNS 5mΩ – 20mΩ typ. Figure 1. 2 Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s) :bq20z40 bq20z40 www.ti.com................................................................................................................................................ SLUS801A – FEBRUARY 2009 – REVISED MARCH 2009 TSSOP (PW) (TOP VIEW) XALERT TS2 TS1 CLKOUT PRES PFIN SAFE SMBD NC SMBC 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VCELLVCELL+ VCC VSS MRST SRN SRP VSS SCLK SDATA PIN FUNCTIONS PIN (1) I/O (1) DESCRIPTION NO. NAME 1 XALERT I Input from bq29330 XALERT output. 2 TS2 I 2nd Thermistor voltage input connection to monitor temperature 3 TS1 I 1st Thermistor voltage input connection to monitor temperature 4 CLKOUT O 32.768-kHz output for the bq29330. This pin should be directly connected to the AFE. 5 PRES I Active low input to sense system insertion. Typically requires additional ESD protection. 6 PFIN I Active low input to detect secondary protector output status, and to allow the bq20z40 to report the status of the 2nd level protection output Active high output to enforce additional level of safety protection; e.g., fuse blow. 7 SAFE O 8 SMBD I/OD SMBus data open-drain bidirectional pin used to transfer address and data to and from the bq20z40 9 NC – 10 SMBC I/OD Not used— leave floating 11 SDATA I/O Data transfer to and from bq29330 12 SCLK I/O Communication clock to the bq29330 13 VSS – Connected I/O pin to VSS 14 SRP IA Connections for a small-value sense resistor to monitor the battery charge- and discharge-current flow 15 SRN IA Connections for a small-value sense resistor to monitor the battery charge- and discharge-current flow 16 MRST I Master reset input that forces the device into reset when held low. Must be held high for normal operation 17 VSS P Negative Supply Voltage 18 VCC P Positive Supply Voltage 19 VCELL+ I Input from bq29330 used to read a scaled value of individual cell voltages 20 VCELL– I Input from bq29330 used to read a scaled value of individual cell voltages SMBus clock open-drain bidirectional pin used to clock the data transfer to and from the bq20z40 I = Input, IA = Analog input, I/O = Input/output, I/OD = Input/Open-drain output, O = Output, OA = Analog output, P = Power Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s) :bq20z40 3 bq20z40 SLUS801A – FEBRUARY 2009 – REVISED MARCH 2009................................................................................................................................................ www.ti.com 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 TEST CONDITIONS Supply voltage MIN TYP MAX 2.4 2.5 2.6 No flash programming 400 UNIT V (1) µA ICC Operating mode current I(SLP) Low-power storage mode current I(SD) Shutdown Mode Current VOL Output voltage low SMBC, SMBD, SDATA, SCLK, SAFE VOH Output high voltage, SMBC, SMBD, SDATA, SCLK, SAFE IOH = –1 mA VIL Input voltage low SMBC, SMBD, SDATA, SCLK, XALERT, PRES, PFIN VIH Input voltage high SMBC, SMBD, SDATA, SCLK, XALERT, PRES, PFIN CIN Input capacitance V(AI1) Input voltage range VCELL+, VCELL-,TS1, TS2 V(AI2) Input voltage range SRN, SRP Z(AI2) Input impedance VCELL+, VCELL-, TS1, TS2 0 V–1 V 8 MΩ Z(AI1) Input impedance SRN, SRP 0 V–1 V 2.5 MΩ (1) bq20z40 + bq29330 475 Sleep mode 8 (1) bq20z40 + bq29330 µA 51 0.1 (1) Shutdown mode bq20z40 + bq29330 µA 0.2 IOL = 0.5 mA 0.4 VCC – 0.5 V V –0.3 0.8 V 2 6 V 5 pF –0.2 0.8xVCC – 0.20 0.20 V This value does not include the bq29330 POWER-ON RESET VCC = 2.4V to 2.6 V, TA = –40°C to 85°C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VIT– Negative-going voltage input 1.7 1.8 1.9 V VHYS Power-on reset hysteresis 50 125 200 mV 4 Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s) :bq20z40 bq20z40 www.ti.com................................................................................................................................................ SLUS801A – FEBRUARY 2009 – REVISED MARCH 2009 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 MAX 0.2 V µV 10 0.007% UNIT 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) TA = 20°C to 70°C t(SXO) Start-up 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) t(LSXO) Start-up time (1) (2) (3) (4) (5) The The The The The 32.768 TA = 20°C to 70°C (5) KHz –2.5% 0.25% 2.5% –1.5% 0.25% 1.5% 500 µs frequency error is measured from 4.194 MHz. frequency drift is included and measured from the trimmed frequency at VCC = 2.5 V, TA = 25°C. start-up time is defined as the time it takes for the oscillator output frequency to be within 1 % of the specified frequency. frequency error is measured from 32.768 kHz. start-up time is defined as the time it takes for the oscillator output frequency to be ± 3%. Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s) :bq20z40 5 bq20z40 SLUS801A – FEBRUARY 2009 – REVISED MARCH 2009................................................................................................................................................ www.ti.com 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 TYP MAX UNIT Data retention See (1) 10 Years Flash programming write-cycles See (1) 20,000 Cycles t(WORDPROG) Word programming time See (1) I(DDdPROG) See (1) tDR (1) Flash-write supply current 2 ms 5 10 mA TYP MAX Specified by design. Not production tested. SMBus TIMING SPECIFICATIONS VCC = 2.4 V to 2.6 V, TA = –40°C to 85°C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN fSMB SMBus operating frequency Slave mode, SMBC 50% duty cycle 10 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 100 51.2 4 µs 4.7 4 Receive mode 0 Transmit mode 300 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) 6 kHz 4.7 tHD:DAT (1) (2) (3) (4) UNIT ns 250 See (1) 25 35 4.7 4 50 300 1000 ms µs ms ns The bq20z40 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 bq20z40 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. Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s) :bq20z40 bq20z40 www.ti.com................................................................................................................................................ SLUS801A – FEBRUARY 2009 – REVISED MARCH 2009 SMBus TIMING DIAGRAM t LOW SCLK tR t HD:STA tF t HD:STA t SU:STA t HIGH t SU:STO t SU:DAT t HD:DAT SDATA t BUF P S S Start P Stop t LOW:SEXT SCLK ACK t LOW:MEXT SCLK ACK t LOW:MEXT t LOW:MEXT SCLK SDATA Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s) :bq20z40 7 bq20z40 SLUS801A – FEBRUARY 2009 – REVISED MARCH 2009................................................................................................................................................ www.ti.com FEATURE SET Primary (1st Level) Safety Features The bq20z40 supports a wide range of battery and system protection features that can easily be configured. The primary safety features include: • • • • • Cell over/undervoltage protection Charge and discharge overcurrent Short Circuit Charge and discharge overtemperature with independent alarms and thresholds for each thermistor AFE Watchdog Secondary (2nd Level) Safety Features The secondary safety features of the bq20z40 can be used to indicate more serious faults via the SAFE (pin 7). This pin can be used to blow an in-line fuse to permanently disable the battery pack from charging or discharging. The secondary safety protection features include: • • • • • • • • • Safety overvoltage Safety undervoltage Safety overcurrent in charge and discharge Safety overtemperature in charge and discharge with independent alarms and thresholds for each thermistor Charge FET and 0 Volt Charge FET fault Discharge FET fault Cell imbalance detection (active and at rest) Open thermistor detection AFE communication fault Charge Control Features The bq20z40 charge control features include: • Supports JEITA temperature ranges. Reports charging voltage and charging current according to the active temperature range. • Handles more complex charging profiles. Allows for splitting the standard temperature range into 2 sub-ranges and allows for varying the charging current according to the cell voltage. • Reports 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. • Determines the chemical state of charge of each battery cell using Impedance Track™ and can reduce the charge difference of the battery cells in fully charged state of the battery pack gradually using cell balancing algorithm during charging. This prevents fully charged cells from overcharging and causing excessive degradation and also increases the usable pack energy by preventing premature charge termination • Supports pre-charging/zero-volt charging • Supports charge inhibit and charge suspend if battery pack temperature is out of temperature range • Reports charging fault and also indicate charge status via charge and discharge alarms. Gas Gauging The bq20z40 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. See Theory and Implementation of Impedance Track Battery Fuel-Gauging Algorithm application note (SLUA364) for further details. 8 Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s) :bq20z40 bq20z40 www.ti.com................................................................................................................................................ SLUS801A – FEBRUARY 2009 – REVISED MARCH 2009 Lifetime Data Logging Features The bq20z40 offers lifetime data logging, where important measurements are stored for warranty and analysis purposes. The data monitored include: • Lifetime maximum temperature • Lifetime minimum temperature • Lifetime maximum battery cell voltage • Lifetime minimum battery cell voltage • Lifetime maximum battery pack voltage • Lifetime minimum battery pack voltage • Lifetime maximum charge current • Lifetime maximum discharge current • Lifetime maximum charge power • Lifetime maximum discharge power • Lifetime maximum average discharge current • Lifetime maximum average discharge power • Lifetime average temperature Authentication The bq20z40 supports authentication by the host using SHA-1. Power Modes The bq20z40 supports 3 different power modes to reduce power consumption: • • • In Normal Mode, the bq20z40 performs measurements, calculations, protection decisions and data updates in 1 second intervals. Between these intervals, the bq20z40 is in a reduced power stage. In Sleep Mode, the bq20z40 performs measurements, calculations, protection decisions and data update in adjustable time intervals. Between these intervals, the bq20z40 is in a reduced power stage. The bq20z40 has a wake function that enables exit from Sleep mode, when current flow or failure is detected. In Shutdown Mode the bq20z40 is completely disabled. CONFIGURATION Oscillator Function The bq20z40 fully integrates the system and processor oscillators and, therefore, requires no pins or components for this feature. System Present Operation The bq20z40 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, bq20z40 enters normal operating mode. When the pack is removed from the system and the PRES input is high, the bq20z40 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. BATTERY PARAMETER MEASUREMENTS The bq20z40 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. Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s) :bq20z40 9 bq20z40 SLUS801A – FEBRUARY 2009 – REVISED MARCH 2009................................................................................................................................................ www.ti.com 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 bq20z40 detects charge activity when VSR = V(SRP) - V(SRN) is positive, and discharge activity when VSR = V(SRP) - V(SRN) is negative. The bq20z40 continuously integrates the signal over time, using an internal counter. The fundamental rate of the counter is 0.65 nVh. Voltage The bq20z40 updates the individual series cell voltages through the bq29330 at one second intervals. The bq20z40 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 bq20z40. The internal ADC of the bq20z40 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 bq20z40 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 bq20z40 can exit sleep mode, if enabled, by the presence of a programmable level of current signal across SRP and SRN. Auto Calibration The bq20z40 provides an auto-calibration feature to cancel the voltage offset error across SRP and SRN for maximum charge measurement accuracy. The bq20z40 performs auto-calibration when the SMBus lines stay low continuously for a minimum of a programmable amount of time. Temperature The bq20z40 has an internal temperature sensor and inputs for 2 external temperature sensors, TS1 and TS2, used in conjunction with two identical NTC thermistors (default are Semitec 103AT) to sense the battery environmental temperature. The bq20z40 can be configured to use internal, or up to 2 external temperature sensors. COMMUNICATIONS The bq20z40 uses SMBus v1.1 with Master Mode and package error checking (PEC) options per the SBS specification. SMBus On and Off State The bq20z40 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. 10 Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s) :bq20z40 bq20z40 www.ti.com................................................................................................................................................ SLUS801A – FEBRUARY 2009 – REVISED MARCH 2009 SBS Commands 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 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 hex 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 20+1 — — Texas Inst. — 0x21 R/W DeviceName String 20+1 — — bq20z40 — 0x22 R/W DeviceChemistry String 4+1 — — LION — 0x23 R/W ManufacturerData String 14+1 — — — — 0x2f R/W Authenticate String 20+1 — — — — 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 Unit — Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s) :bq20z40 11 bq20z40 SLUS801A – FEBRUARY 2009 – REVISED MARCH 2009................................................................................................................................................ www.ti.com 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 — — — — 0x46 R/W FETControl hex 2 0x00 0xff — — 0x4f R StateOfHealth hex 2 0x0000 0xffff — % 0x51 R SafetyStatus hex 2 0x0000 0xffff — — 0x53 R PFStatus hex 2 0x0000 0xffff — — 0x54 R OperationStatus hex 2 0x0000 0xffff — — 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 0x5e R TS1Temperature integer 2 –400 1200 — 0.1°C 0x5f R TS2Temperature integer 2 –400 1200 — 0.1°C 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 — — 0x69 R SafetyStatus2 hex 2 0x0000 0x0003 — — 0x6b R PFStatus2 hex 2 0x0000 0x0003 — — 0x6c R/W ManufBlock1 String 20 — — — — 0x6d R/W ManufBlock2 String 20 — — — — 0x6e R/W ManufBlock3 String 20 — — — — 0x6f R/W ManufBlock4 String 20 — — — — 0x70 R/W ManufacturerInfo String 31+1 — — — — 0x71 R/W SenseResistor unsigned int 2 0 65535 — µΩ 0x72 R TempRange hex 2 — — — — 0x73 R LifetimeData String 32+1 — — — — 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 — — — — 12 Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s) :bq20z40 bq20z40 www.ti.com................................................................................................................................................ SLUS801A – FEBRUARY 2009 – REVISED MARCH 2009 APPLICATION SCHEMATIC Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s) :bq20z40 13 PACKAGE OPTION ADDENDUM www.ti.com 22-May-2009 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty BQ20Z40PW ACTIVE TSSOP PW 20 BQ20Z40PWR ACTIVE TSSOP PW 20 70 Lead/Ball Finish MSL Peak Temp (3) Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM (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) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. 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Addendum-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 20-May-2009 TAPE AND REEL INFORMATION *All dimensions are nominal Device BQ20Z40PWR Package Package Pins Type Drawing TSSOP PW 20 SPQ Reel Reel Diameter Width (mm) W1 (mm) 2000 330.0 16.4 Pack Materials-Page 1 A0 (mm) B0 (mm) K0 (mm) P1 (mm) 6.95 7.1 1.6 8.0 W Pin1 (mm) Quadrant 16.0 Q1 PACKAGE MATERIALS INFORMATION www.ti.com 20-May-2009 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) BQ20Z40PWR TSSOP PW 20 2000 346.0 346.0 33.0 Pack Materials-Page 2 MECHANICAL DATA MTSS001C – JANUARY 1995 – REVISED FEBRUARY 1999 PW (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE 14 PINS SHOWN 0,30 0,19 0,65 14 0,10 M 8 0,15 NOM 4,50 4,30 6,60 6,20 Gage Plane 0,25 1 7 0°– 8° A 0,75 0,50 Seating Plane 0,15 0,05 1,20 MAX PINS ** 0,10 8 14 16 20 24 28 A MAX 3,10 5,10 5,10 6,60 7,90 9,80 A MIN 2,90 4,90 4,90 6,40 7,70 9,60 DIM 4040064/F 01/97 NOTES: A. B. C. D. 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