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bq2060A

www.ti.com

SLUS500D –OCTOBER 2001– REVISED OCTOBER 2011

SBS v1.1-Compliant Gas Gauge IC

Check for Samples: bq2060A

The bq2060A supports the smart battery data

FEATURES

(SBData) commands and charge-control functions. It

• Provides Accurate Measurement of Available

communicates data using the system management

Charge in NiCd, NiMH, Li-Ion, and Lead-Acid

bus (SMBus) 2-wire protocol or the Benchmarq 1-wire

Batteries

HDQ16 protocol. The data available include the

remaining battery capacity, temperature, voltage,

• Supports SBS Smart Battery Data

current, and remaining run-time predictions. The

Specification v1.1

bq2060A provides LED drivers and a pushbutton

• Supports the 2-Wire SMBus v1.1 Interface With

input to depict remaining battery capacity from full to

PEC or 1-Wire HDQ16

empty in 20% or 25% increments with a 4- or

• Reports Individual Cell Voltages

5-segment display.

• Monitors and Provides Control to Charge and

The bq2060A works with an external EEPROM. The

Discharge FETs in Li-Ion Protection Circuit

EEPROM stores the configuration information for the

bq2060A, such as battery chemistry, self-discharge

• Provides 15-Bit Resolution for Voltage,

rate, rate compensation factors, measurement

Temperature, and Current Measurements

calibration, and design voltage and capacity. The

• Measures Charge Flow Using a V-to-F

bq2060A uses the programmable self-discharge rate

Converter With Offset of Less Than 16 µV After

and other compensation factors stored in the

Calibration

EEPROM to accurately adjust remaining capacity for

• Consumes Less Than 0.5 mW Operating

use and standby conditions based on time, rate, and

temperature. The bq2060A also automatically

• Drives a 4- or 5-Segment LED Display for

calibrates or learns the true battery capacity in the

Remaining Capacity Indication

course of a discharge cycle from near-full to

• 28-Pin 150-Mil (3,8-mm) SSOP

near-empty levels.

The REG output regulates the operating voltage for

DESCRIPTION

the bq2060A from the battery cell stack using an

The bq2060A SBS-compliant gas gauge IC for

external JFET.

battery pack or in-system installation maintains an

accurate record of available charge in rechargeable

PIN CONNECTIONS

batteries. The bq2060A monitors capacity and other

critical battery parameters for NiCd, NiMH, Li-ion, and

lead-acid chemistries. The bq2060A uses a

150-Mil (3,8-mm) SSOP

28-Pin

voltage-to-frequency converter with automatic offset

error correction for charge and discharge counting.

For voltage, temperature, and current reporting, the

bq2060A uses an A-to-D converter. The onboard

ADC also monitors individual cell voltages in a Li-ion

battery pack and allows the bq2060A to generate

control signals that may be used with a pack

supervisor to enhance pack safety.

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.

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.

Summary of content (61 pages)

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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com SBS v1.1-Compliant Gas Gauge IC Check for Samples: bq2060A FEATURES 1 • • • • • • • • • • Provides Accurate Measurement of Available Charge in NiCd, NiMH, Li-Ion, and Lead-Acid Batteries Supports SBS Smart Battery Data Specification v1.1 Supports the 2-Wire SMBus v1.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com ABSOLUTE MAXIMUM RATINGS Supply voltage, VCC MIN MAX –0.3 6 V –0.3 6 V VSS – 0.3 V + 0.3 to CC V Relative to VSS HDQ16, SMBC, SMBD relative to VSS Input Voltage, VIN All other pins UNIT Operating temperature, TOPR –20 70 °C Junction temperature, TJ –40 125 °C NOTES Commercial DC ELECTRICAL CHARACTERISTICS VCC = 2.7 V to 3.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com REG CHARACTERISTICS TOPR = –20°C to 70°C SYMBOL VRO IREG 4 PARAMETER Normal mode: REG controlled output voltage Sleep mode: REG controlled output voltage TEST CONDITIONS MIN TYP MAX 3.1 3.3 3.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com SMBus AC SPECIFICATIONS VCC = 2.7 V to 3.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com THIGH SMBC THD:STA TLOW TSU:STA TSU:STO SMBD THD:DAT TSU:DAT TBUF Figure 1. SMBus Timing Data Figure 2. HDQ16 Break Timing Figure 3. HDQ16 Host to bq2060A Figure 4. HDQ16 bq2060A to Host FUNCTIONAL DESCRIPTION General Operation The bq2060A determines battery capacity by monitoring the amount of charge input or removed from a rechargeable battery.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com Figure 5 shows a typical bq2060A-based battery-pack application. The circuit consists of the LED display, voltage and temperature measurement networks, EEPROM connections, a serial port, and the sense resistor. The EEPROM stores basic battery-pack configuration information and measurement-calibration values. The EEPROM must be programmed properly for bq2060A operation.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com VCC bq2060 LED1 LED2 To Pack VCC Protection Circuitry A0 VCC VCC LED3 CVON LED4 VCELL4 LED5 VCELL3 CFC VCELL2 DFC VCELL1 G S D SST113 PACK+ RBI DISP EEPROM REG VCC VCC SRC A1 A2 ESCL SCL SR2 R5 WP VSS SDA VCC ESDA SR1 PACK- THON SMBC SMBC TS SMBD SMBD VSS HDQ16 Thermistor HDQ Figure 5.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com Table 1. Example VCELL1–VCELL4 Divider and Input Range Table 2. SRC Input Range SENSE RESISTOR (Ω) FULL-SCALE INPUT (A) 0.02 ± 12.5 0.03 ± 8.3 VOLTAGE INPUT VOLTAGE DIVISION RATIO FULL-SCALE INPUT (V) VCELL4 16 20 VCELL3 16 20 0.05 ±5 VCELL2 8 10 0.1 ± 2.5 VCELL1 8 10 Current The SRC input of the bq2060A measures battery charge and discharge current.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 Inputs www.ti.com Charge Current Battery Electronics Load Estimate Discharge Current Self-Discharge Timer Charge Efficiency Compensation Temperature Compensation − + Main Counters and Capacity Reference (FCC) − − Remaining Capacity (RM) + Full Charge Capacity (FCC) ≤ + + Discharge Count Qualified Register (DCR) Transfer Temperature, Other Data Outputs Chip-Controlled Available Charge LED Display Two-Wire Serial Port Figure 6.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com Table 3.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com Discharge Count Register (DCR) The DCR register counts up during discharge, independent of RM. DCR can continue to count even after RM has counted down to 0. Prior to RM = 0, discharge activity, light discharge estimation and self-discharge increment DCR. After RM = 0, only discharge activity increments DCR. The bq2060A initializes DCR to FCC – RM when FCC-RM is less than twice the programmed value in Near Full EE 0x55.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com Self-Discharge The bq2060A estimates the self-discharge of the battery to maintain an accurate measure of the battery capacity during periods of inactivity. The algorithm for self-discharge estimation takes a programmed estimate for the expected self-discharge rate at 25°C stored in EEPROM and makes a fixed reduction to RM of an amount equal to RemainingCapacity()/256.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com 1200 Capacity − mAh 1000 15°C 800 600 25°C 400 35°C 200 45°C 0 0 10 20 30 40 50 60 70 t − Time − days Figure 7. Self-Discharge at 2.5%/Day at 25°C Midrange Capacity Corrections The bq2060A applies midrange capacity corrections when the VCOR bit is set in Pack Configuration. The bq2060A adjusts RM to the associated percentage at three different voltage levels VOC25, VOC50, and VOC75.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com Pre-Charge Qualification The bq2060A sets ChargingCurrent() to the pre-charge rate as programmed in Pre-Charge Current EE 0x1e–0x1f under the following conditions: • Voltage: The bq2060A requests the pre-charge charge rate when Voltage() drops below the EDV0 threshold (compensated or fixed EDVs). Once requested, a pre-charge rate remains until Voltage() increases above the EDVF threshold.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com Primary Charge Termination The bq2060A terminates charge if it detects a charge-termination condition. A charge-termination condition includes the following. • ΔT/Δt:For ΔT/Δt, the bq2060A detects a change in temperature over many seconds. The ΔT/Δt setting is programmable in both the temperature step, DeltaT (1.6°C – 4.6°C), and the time step, DeltaT Time (20 s – 320 s). Typical settings for 1°C/minute include 2°C/120 s and 3°C/180 s.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com In either mode, the bq2060A blinks the LED display if RemainingCapacity() is less than Remaining CapacityAlarm(). The display is disabled if EDV0 = 1. Secondary Protection for Li-ion The bq2060A has two pins, CFC and DFC, that can be used for secondary override control of a Li-ion protector or for blowing a fuse to disable the battery pack. The CFC pin is the Charge FET Control pin for secondary protector control or for blowing a fuse.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com Table 7. 5-LED Display Mode 5-LED Display Option Condition Relative or Absolute StateOfCharge() LED1 LED2 LED3 LED4 LED5 EDV0 = 1 OFF OFF OFF OFF OFF <20% ON OFF OFF OFF OFF ≤20%, <40% ON ON OFF OFF OFF ≤40%, <60% ON ON ON OFF OFF ≤60%, <80% ON ON ON ON OFF ≤80% ON ON ON ON ON Table 8.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com SMBus The SMBus interface is a command-based protocol. A processor acting as the bus master initiates communication to the bq2060A by generating a START condition. A START condition consists of a high-to-low transition of the SMBD line while the SMBC is high. The processor then sends the bq2060A device address of 0001011 (bits 7–1) plus a R/W bit (bit 0) followed by an SMBus command code.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com PEC Calculation The basis of the PEC calculation is an 8-bit Cyclic Redundancy Check (CRC-8) based on the polynomial C(X) = X8+X2+X1+1. The PEC calculation includes all bytes in the transmission, including address, command, and data. The PEC calculation does not include ACKNOWLEDGE, NOT ACKNOWLEDGE, START, STOP, and Repeated START bits. For example, the host requests RemainingCapacity() from the bq2060A.
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bq2060A ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎ ÎÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎ ÎÎ ÎÎ ÎÎ www.ti.
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bq2060A ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ ÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎ ÎÎ ÎÎ ÎÎ SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 1 S 7 1 Battery Address 0 0001011 1 8 1 8 A Command Code A Data Byte Low Write Word 1 S 7 1 Battery Address 0 0001011 8 Data Byte Low S 8 Byte Count = N bq2060A A Data Byte High 8 1 1 7 1 1 A S Batt
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com The bq2060A clears the ManufacturerAccess() command within 900 ms of acknowledging the Enable Low-Power Storage command. The VFC Calibration command may be sent 900–5000 ms after SMBus acknowledgment of the Enable Low-Power Storage command. In this case, the bq2060A delays entering storage mode until the calibration process completes and the bq2060A stores the new calibration values in EEPROM.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com Example:The following sequence of actions is an example of how to use the ManufacturerAccess() commands in an efficient manner to take a battery pack that has completed all testing and calibration except for VFC calibration and to make it ready for shipment in the SEALED state and in low-power storage mode: • Complete testing and calibration with desired final values stored in EEPROM.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com Purpose: The RemainingTimeAlarm() function can be used by systems that want to adjust when the remaining time alarm warning is sent. The remaining time value can be read to verify the value in use by the bq2060 RemainingTimeAlarm(). SMBus Protocol: Read or Write Word Input/Output: Unsigned integer—the point below which remaining time messages are sent.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com Table 9.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com • • • • • RunTimeToEmpty() AverageTimeToEmpty() AverageTimeToFull() Remaining Time Alarm() BatteryStatus() The bq2060A updates the non-AtRate related register values within 3 s of changing the state of the CAPACITY_MODE bit. The AtRate() values are updated after the next AtRate value is written to the bq2060A (or after the next 20 s scheduled refresh calculation).
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com Unsigned integer—predicted time in minutes to fully charge the battery. • Units: minutes • Range: 0 to 65,534 min • Granularity: 2 min or better • Accuracy: ±MaxError() * FullChargeCapacity() / |AtRate()| • Invalid Data Indication: 65,535 indicates the battery is not being charged. AtRateTimeToEmpty() (0x06); [0x06] Description: Returns the predicted remaining operating time if the battery is discharged at the AtRate() value.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com Unsigned integer—cell temperature in tenth-degree Kelvin increments. • Units: 0.1°K • Range: 240.4°K to 388.0°K • Granularity: 0.1°K • Accuracy: ±1.5°K (from ideal 103AT thermistor performance, after calibration from 0°K to 70°K) Voltage() (0x09); [0x09] Description: Returns the cell-pack voltage (mV). Purpose: The Voltage() function provides power management systems with an accurate battery terminal voltage.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com MaxError() (0x0c); [0x0c] Description: Returns the expected margin of error (%) in the state of charge calculation. For example, when MaxError() returns 10% and RelativeStateOfCharge() returns 50%, the Relative StateOfCharge() is more likely between 50% and 60%. The bq2060A sets MaxError() to 100% on a full reset.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com SMBus Protocol: Read Word Output: Unsigned integer—remaining charge in mAh or 10 mWh. BATTERY MODE CAPACITY_MODE BIT = 0 CAPACITY_MODE BIT = 1 Units mAh 10 mWh Range 0–65,535 mAh 0–65, 535 10 mWh Granularity mAh 10 mWh Accuracy –0, +MaxError()*FullChargeCapacity() FullChargeCapacity() (0x10); [0x10] Description: Returns the predicted pack capacity when it is fully charged.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com AverageTimeToEmpty() (0x12); [0x12] Description: Returns a 1-minute rolling average of the predicted remaining battery life (minutes). The AverageTimeToEmpty() value is calculated based on either current or power depending on the setting of the BatteryMode() CAPACITY_MODE bit. Purpose: The AverageTimeToEmpty() displays state-of-charge information in a more useful way.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com ChargingVoltage() (0x15); [0x15] Description: Returns the desired charging voltage in mV. Purpose: The ChargingVoltage() function sets the maximum charge voltage of the battery. The ChargingVoltage() value should be used in combination with the ChargingCurrent() value to set the charger operating point. Together, these functions permit the bq2060A to dynamically control the charging profile (current/voltage) of the battery.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com ERROR CODES 0x0004 AccessDenied 0x0003 UnsupportedCommand 0x0002 ReservedCommand 0x0001 Busy 0x0000 OK Alarm Bits OVER_CHARGED_ALARM bit is set whenever the bq2060A detects that the battery is being charged beyond the Maximum Overcharge limit. This bit is cleared when the bq2060A detects that the battery is no longer being charged (i.e., the bq2060A detects discharge activity or no activity for the digital filter timeout periods).
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com CycleCount()(0x17); [0x17] Description: Returns the number of cycles the battery has experienced. The mAh value of each count is determined by programming the Cycle Count Threshold value in EE 0x3c–0x3d. The bq2060A saves the cycle count value to Cycle Count EE 0x0e–0x0f after an update to CycleCount(). Purpose: The CycleCount() function provides a means to determine the battery wear.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com SpecificationInfo() (0x1a); [0x1a] Description: Returns the version number of the Smart Battery specification that the battery pack supports, as well as voltage and current scaling information in a packed unsigned integer. Power scaling is the product of the voltage scaling times the current scaling.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com ManufacturerName() (0x20); [0x20–0x2a] Description: This function returns a character array containing the battery manufacturer's name. For example, MyBattCo would identify the Smart Battery manufacturer as MyBattCo. The bq2060A sets ManufacturerName() to the value programmed in Manufacturer Name EE 0x20–0x2a. Purpose: The ManufacturerName() function returns the name of the Smart Battery manufacturer.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com Output: Block data—data that reflects EEPROM programming as assigned by the manufacturer with maximum length of 7 characters (7+length byte). Pack Status and Pack Configuration (0x2f); [0x2f] This function returns the Pack Status and Pack Configuration registers. The Pack Status register contains a number of status bits relating to bq2060A operation. The Pack Status register is the least significant byte of the word.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com 1 DFC pin is high CVOV The CVOV bit indicates that a secondary Li-ion protection limit has been exceeded. It is set if any individual cell exceeds the programmed high voltage limit, if the pack voltage exceeds the overvoltage threshold, or if an overtemperature condition occurs. The bit is not latched and merely reflects the present overvoltage status.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com The 16-bit VFC Sense Resistor Gain in EE 0x6a–0x6b scales each VFC interrupt to mAh. VFC Sense Resistor Gain is based on the resistance of the series sense resistor. The following formula computes a nominal or starting value for VFC Sense Resistor Gain from the sense resistor value. VFC Sense Resistor Gain + 409.6 (Rs) (5) Sense resistor values are limited to the range of 0.00954 to 0.100 Ω.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com Table 10.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com Table 10.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com EDV Discharge Rate and Temperature Compensation If EDV compensation is enabled, the bq2060A calculates battery voltage to determine EDV0, EDV1, and EDV2 thresholds as a function of battery capacity, temperature, and discharge load. (See Figure 11 and Figure 12.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com F CY + f (A0, Cycle Count()) (12) where A0 is the EDV aging factor that is stored in EDV A0 Factor EE 0x06. It should be set to 0 for most applications.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com Charge Efficiency = 10 x (EFF% - 74.5 ) (15) where 74.5 ≤ EFF% ≤ 100 ERR% is encoded in Efficiency Reduction Rate EE 0x65 according to the following equation: Efficiency Reduction Rate = ERR% 0.0125 where • 0 ≤ ERR% ≤ 3.19 (16) The Efficiency Drop Off Percentage is stored in 2s complement of percent. The bq2060A also adjusts the efficiency factors for temperature. TEFF% defines the percent efficiency reduction per degree C over 25°C.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com When fast charge terminates, the bq2060A sets ChargingCurrent() to zero and then to the Maintenance Charging Current EE 0x1c–0x1d when the termination condition ceases. When Voltage() is less than EDV0, the bq2060A sets ChargingCurrent() to Pre-charge Current EE 0x1e–0x1f. Typically, this rate is larger than the maintenance rate to charge a deeply depleted pack up to the point where it may be fast charged.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com Table 11. (continued) DeltaT Δ(°C) DeltaT_Time t (s) 3 2.2 03 260 4 2.4 04 240 5 2.6 05 220 6 2.8 06 200 7 3.0 07 180 8 3.2 08 160 9 3.4 09 140 a 3.6 0a 120 b 3.8 0b 100 c 4.0 0c 80 d 4.2 0d 60 e 4.4 0e 40 f 4.6 0f 20 ΔT/Δt Holdoff Timer Programming The holdoff timer is programmed in the lower nibble of Holdoff Time EE 0x4f.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com DMODE The DMODE bit determines RelativeStateOfCharge() whether the 0 LEDs reflect AbsoluteStateOfCharge() 1 LEDs reflect RelativeStateOfCharge() LED outputs will indicate AbsoluteStateOfCharge() or SEAL The SEAL bit determines the SMBus access state of the bq2060A on reset 0 SMBus commands (0x00–0xff) are accessible for both read and write. 1 SMBus read access is limited to commands (0x05–0x1c) and (0x20–0x23).
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com NO. OF SERIES CELLS LCC1, LCC0 CELL VOLTAGE INPUTS NA 00 VCELL4= Cell Stack 2 01 VCELL1 = Cell 1 VCELL2 = Cell 2 3 10 VCELL1= Cell 1 VCELL2= Cell 2 VCELL3= Cell 3 VCELL1= Cell 1 4 VCELL2= Cell 2 11 VCELL3= Cell 3 VCELL4= Cell 4 For Li-ion packs with individual measurements, LCC0 and LCC1 define the number of series elements and their voltage measurement inputs.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com Safety Overtemperature EE 0x09 sets Safety Overtemperature Threshold (SOT) level for the CFC pin. It can be programmed for a threshold of 69°C to 94.5°C. This range is increased by 16°C if Miscellaneous Options bit 5 = 1. Safety Overtemperature = (94.5 – SOT)*10 if Miscellaneous Options bit 5 = 0. Safety Overtemperature = (110.5 – SOT)*10 if Miscellaneous Options bit 5 = 1.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com HPE The HPE bit enables/disables PEC transmissions to the Smart Battery host for master mode alarm messages. 0 No PEC byte on alarm warning to host 1 PEC byte on alarm warning to host CPE The CPE bit enables/disables PEC transmissions to the Smart Battery Charger for master mode alarm messages.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com The bq2060A first computes the node voltages Vn1, Vn2, Vn3, and Vn4. The node voltages are inputs to the voltage dividers to the VCELL1 through VCELL4 input pins of the bq2060A. The bq2060A computes node voltages to calculate the five reported voltages by the bq2060A: Voltage(), VCELL1, VCELL2, VCELL3, and VCELL4.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com Current = [(ADC Reading + ADC Offset) x ADC Sense Resistor Gain] 16384 (31) The nominal value for ADC Sense Resistor Gain is given by Equation 4. VFC To calibrate the coulomb counting measurement for VFC gain errors and sense resistor tolerance, the value of VFC Sense Resistor Gain EE 0x6a–0x6b may be adjusted from its nominal value. The nominal value of VFC Sense Resistor Gain is given by Equation 5.
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bq2060A SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011 www.ti.com Device Name Data Device Name Length EE 0x30 stores the length of the desired string that is returned by the DeviceName() function. Locations EE 0x31–0x37 store the characters for DeviceName() in ASCII code. Device Chemistry Data Device Chemistry Length EE 0x40 stores the length of the desired string that is returned by the DeviceChemistry() function. Locations EE 0x41–0x44 store the characters for DeviceChemistry() in ASCII code.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 26-Jan-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device BQ2060A-E619DBQR Package Package Pins Type Drawing SSOP DBQ 28 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 2500 330.0 16.4 Pack Materials-Page 1 6.5 B0 (mm) K0 (mm) P1 (mm) 10.3 2.1 8.0 W Pin1 (mm) Quadrant 16.
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PACKAGE MATERIALS INFORMATION www.ti.com 26-Jan-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) BQ2060A-E619DBQR SSOP DBQ 28 2500 367.0 367.0 38.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.