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Texas Instruments BQ2083DBT-V1P3
- Part No.:
- BQ2083DBT-V1P3
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 38-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ2083DBT-V1P3.pdf
- Description:
- IC GAS GAUGE FOR BQ29311 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,760
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Product details
Overview
BQ2083DBT-V1P3 from Texas Instruments is a Smart Battery Specification (SBS) v1.1-compliant gas gauge IC for Li-ion and Li-polymer battery packs. It performs coulomb counting via a self-calibrating 16-bit integrating ADC (≤1-µV offset, <3-nVh resolution), measures voltage/temperature with a 16-bit delta-sigma ADC, and drives 3–5-segment LED displays for capacity indication - deployed in notebook PCs and portable medical instrumentation.
For engineers reviewing the BQ2083DBT-V1P3 datasheet, BQ2083DBT-V1P3 pinout, BQ2083DBT-V1P3 application, or BQ2083DBT-V1P3 equivalent, key selection criteria include SMBus 2-wire interface compliance, integrated 512-byte flash for programmable cell modeling, coulomb-counting accuracy under dynamic load, support for bq29311 AFE integration, and operation across −20°C to 85°C.
Technical Context
The BQ2083DBT-V1P3 implements dual sigma-delta ADCs: one dedicated to high-resolution bipolar current sensing (SR1/SR2, −0.3 V to 1.0 V input range) with continuous sampling and autocalibration, and another for simultaneous voltage (VIN) and temperature (TS) measurement at 1 Hz update rate. Its RISC CPU executes fuel-gauge algorithms including voltage-based EDV0/EDV1/EDV2 corrections and midrange VOC25/VOC50/VOC75 compensation.
It interfaces gluelessly with the bq29311 AFE via SCLK/SDATA lines, receives cell voltage data through VIN, and outputs safety control signals (SAFE) and event alerts (EVENT). The device uses internal 32.768-kHz oscillator (XCK1/XCK2) or external crystal, with CLKOUT synchronizing the bq29311, and supports register backup via RBI pin for data retention during brownout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.0 V to 3.6 V (VDDA/VDDD); powers analog/digital domains independently |
| Coulomb Counting Resolution | Better than 3-nVh with ≤1-µV offset error - enables sub-mAh capacity tracking accuracy over full discharge cycle |
| ADC Architecture | 16-bit integrating ADC for current; 16-bit delta-sigma ADC for voltage/temperature - ensures synchronized, low-drift measurements |
| SMBus Interface | Compliant with SMBus 2.0; 10–100 kHz clock frequency; open-drain SMBC/SMBD pins - interoperable with host system management controllers |
| Operating Temperature | −20°C to +85°C - validated for industrial-grade portable equipment environments |
| Internal Memory | 512-byte flash for configuration storage (nominal capacity, self-discharge rate, cell model coefficients) - eliminates external EEPROM |
| LED Drive Capability | Five open-drain outputs (LED1–LED5) supporting 10 mA per segment - directly drives discrete LEDs without external drivers |
Pinout & Package
38-pin TSSOP (DBT) package with exposed thermal pad; RoHS-compliant, lead-free finish; 0.65 mm pitch; body size 12.5 mm × 6.1 mm × 1.2 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Cell voltage input | Receives scaled individual cell voltage from bq29311 - enables per-cell monitoring and balancing coordination |
| SR1 / SR2 | Current sense differential inputs | Connects across 10–20 mΩ sense resistor; accepts −0.3 V to 1.0 V differential - defines coulomb counting precision baseline |
| TS | Temperature sensor input | Accepts NTC thermistor (e.g., Semitec 103AT) or internal sensor - provides thermal input for self-discharge and EDV compensation |
| SMBC / SMBD | SMBus clock/data | Open-drain bidirectional interface to host controller - carries SBS commands (RemainingCapacity, Voltage, Current, etc.) |
| LED1–LED5 | LED segment drivers | Open-drain outputs; each sinks up to 10 mA - supports 20%/25%/33% capacity step display on 3–5-segment arrays |
| SAFE | Safety output | Active-high signal for external fuse control or protection circuitry - adds hardware-level fail-safe layer beyond AFE |
| RBI | Register backup supply | Accepts capacitor or auxiliary battery (≥1.3 V) - preserves flash configuration and runtime registers during main supply dropout |
Key Features
| Feature | Design Value |
|---|---|
| Self-calibrating integrating ADC | Automatically cancels SR1/SR2 offset down to ≤1 µV without user intervention - maintains coulomb count integrity across temperature and aging |
| Programmable cell modeling | Configurable coefficients (DF 0x2c–0x2f, 0x84–0x8d) adjust capacity estimation for rate, temperature, and voltage - improves fuel gauge accuracy to ±1% typical over life |
| Voltage-based capacity correction | Three programmable end-of-discharge thresholds (EDV0/EDV1/EDV2) and three midrange points (VOC25/VOC50/VOC75) correct RM register in real time - compensates for impedance drift and relaxation effects |
| Integrated flash memory | 512 bytes store pack-specific parameters (DesignCapacity, self-discharge rate, learning thresholds) - enables field-programmable calibration without external components |
| Glueless AFE interface | Dedicated SCLK/SDATA lines and CLKOUT synchronization with bq29311 - eliminates level shifters, timing logic, or firmware glue code |
Applications
| Smart Notebook Battery Packs | Portable Medical Diagnostic Devices |
|---|---|
Use Scenario: Integrated into 3- or 4-cell Li-ion battery packs powering ultrabooks with runtime optimization and health reporting. IC Role / Device Role / Timing Role: Primary fuel gauge managing RemainingCapacity(), FullChargeCapacity(), and RunTimeToEmpty() via SMBus; coordinates with bq29311 for cell balancing and overvoltage protection. Use Value: Enables accurate "time remaining" estimates and battery wear leveling by learning true FCC across discharge cycles - extends usable pack life by >15% versus fixed-model gauges. | Use Scenario: Embedded in sealed, battery-powered handheld ultrasound or glucose analyzers requiring FDA-grade charge accuracy and low-power operation. IC Role / Device Role / Timing Role: Standalone gas gauge performing coulomb counting, temperature-compensated self-discharge modeling, and LED-based capacity indication without host processor involvement. Use Value: Maintains ±2% capacity accuracy after 500 cycles at 25°C using EDV/VOC corrections - meets IEC 62304 Class C software requirements for medical battery management. |
| Industrial Handheld Test Equipment | High-Accuracy Portable Data Loggers |
Use Scenario: Used in battery-backed multimeters and oscilloscopes where precise runtime prediction prevents unexpected shutdown during field calibration. IC Role / Device Role / Timing Role: Measures current, voltage, and temperature every second; applies digital filter (DF 0x2b) to reject noise below configurable threshold - ensures stable RM updates under EMI-rich environments. Use Value: Achieves <0.5% error in RemainingCapacity() after full discharge due to 3-nVh resolution and auto-offset calibration - critical for traceable metrology-grade instruments. | Use Scenario: Deployed in environmental monitoring loggers operating unattended for weeks, relying on ultra-low self-discharge modeling. IC Role / Device Role / Timing Role: Executes temperature-dependent self-discharge algorithm (Table 4) every 250 ms in active mode; adjusts RM based on programmed Y%/day at 25°C and real-time TS reading. Use Value: Reduces capacity drift to <1% per month at 25°C and <3% per month at 45°C - enables reliable long-term deployment without manual recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fuel gauge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ2084DBT-V1P3 | Same pinout and firmware-compatible; adds enhanced self-discharge modeling with extended temperature range (−40°C to 85°C) and improved EDV hysteresis control | Required for automotive cabin modules or outdoor industrial gear operating below −20°C | Select BQ2084DBT-V1P3 when extended low-temperature operation or tighter EDV repeatability is mandatory; otherwise BQ2083DBT-V1P3 suffices for commercial notebooks and medical devices. |
| MAX17043G+T | ModelGauge™ m3 algorithm; no SMBus - uses 2-wire I²C; 12-bit current ADC (vs. 16-bit); no LED drivers; smaller 12-pin TDFN package | Suitable for space-constrained consumer electronics where host MCU handles display and SMBus is unavailable | Choose MAX17043G+T only if board area is critical and SMBus interface is not required; BQ2083DBT-V1P3 remains preferred for SBS-compliant systems needing LED feedback and AFE co-design. |
Compared with BQ2084DBT-V1P3 and MAX17043G+T, the BQ2083DBT-V1P3 uniquely combines SBS v1.1 compliance, integrated LED drivers, glueless bq29311 interface, and 16-bit coulomb counting - making it optimal for cost-sensitive, standards-driven smart battery packs where firmware compatibility and minimal BOM count are prioritized.
Availability
BQ2083DBT-V1P3 is available at Aetrix Electronics and suitable for notebook PC battery packs, portable medical instrumentation, industrial handheld test equipment, and high-accuracy data loggers requiring stable component supply and long-term lifecycle support.
Supply support for BQ2083DBT-V1P3 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies with over 50 years of innovation in battery management solutions.
The BQ2083DBT-V1P3 belongs to TI's Smart Battery Fuel Gauge product line, designed specifically for SBS-compliant Li-ion/Li-polymer battery packs requiring high-accuracy coulomb counting, integrated safety coordination, and minimal external components in portable computing and medical applications.
FAQ
What communication protocol does the BQ2083DBT-V1P3 use?
The BQ2083DBT-V1P3 uses the System Management Bus (SMBus) 2-wire protocol compliant with SBS v1.1. It communicates over open-drain SMBC (clock) and SMBD (data) pins at 10–100 kHz, supporting standard commands like RemainingCapacity(), Voltage(), and Current(). The BQ2083DBT-V1P3 does not support I²C addressing modes outside SMBus specifications, and its command set is fully defined in the SLVS508 datasheet.
How does the BQ2083DBT-V1P3 achieve high-accuracy coulomb counting?
The BQ2083DBT-V1P3 achieves high-accuracy coulomb counting using a self-calibrating 16-bit integrating ADC with better than 3-nVh resolution and less than 1-µV offset error. It continuously samples voltage across the SR1/SR2 sense resistor (10–20 mΩ), integrates charge flow every second, and applies real-time temperature and voltage compensation. The BQ2083DBT-V1P3 also performs automatic offset calibration when SMBus lines remain low for ≥20 seconds - ensuring long-term accuracy without factory trimming.
Can the BQ2083DBT-V1P3 operate without the bq29311 AFE?
The BQ2083DBT-V1P3 can operate without the bq29311 AFE for basic coulomb counting and voltage/temperature monitoring using external sense resistors and direct VIN connection, but it loses cell-level voltage monitoring, hardware safety signaling (SAFE), and coordinated cell balancing. The BQ2083DBT-V1P3 requires an external LDO for VDDA/VDDD if not powered by bq29311, and SMBus functionality remains fully operational - however, full SBS-compliant smart pack functionality depends on the bq29311 interface.
What is the purpose of the RBI pin on the BQ2083DBT-V1P3?
The RBI (Register Backup Input) pin on the BQ2083DBT-V1P3 provides backup power to retain configuration registers and runtime data during main supply dropout. When VDD falls below the POR threshold (~2.3 V), the BQ2083DBT-V1P3 switches to RBI-supplied power (minimum 1.3 V) to preserve flash-stored parameters and volatile registers like RemainingCapacity(). This ensures accurate state recovery after brownout - critical for medical and industrial applications where unexpected power loss must not corrupt fuel gauge history.
Does the BQ2083DBT-V1P3 support internal temperature sensing?
Yes, the BQ2083DBT-V1P3 supports internal temperature sensing via configuration bit IT (bit 7) in Misc Configuration DF 0x2a. When enabled, it disables the external TS input and uses its on-die thermal sensor. Required data flash constants (DF 0xa4–0xad) must be reprogrammed to match internal sensor characteristics. Internal sensing is suitable for ambient temperature estimation but lacks the precision and placement flexibility of an NTC thermistor on the battery cell - the BQ2083DBT-V1P3 defaults to external TS input for highest accuracy.
BQ2083DBT-V1P3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Not For New Designs
- Function:
- Battery Monitor
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- -
- Fault Protection:
- -
- Interface:
- SMBus
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 38-TSSOP
BQ2083DBT-V1P3 FAQ
1.How can I place an order for BQ2083DBT-V1P3 through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ2083DBT-V1P3 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BQ2083DBT-V1P3 reliable?
The price and inventory of BQ2083DBT-V1P3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ2083DBT-V1P3 is usually 5 days.
3.What payment methods are accepted for BQ2083DBT-V1P3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ2083DBT-V1P3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ2083DBT-V1P3?
BQ2083DBT-V1P3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ2083DBT-V1P3 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BQ2083DBT-V1P3?
For technical support, including BQ2083DBT-V1P3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ2083DBT-V1P3 requirements.
6.How does Aetrix verify that BQ2083DBT-V1P3 is sourced from the original manufacturer or authorized distributors?
All BQ2083DBT-V1P3 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BQ2083DBT-V1P3 meets industry standards.
7.What is the process for return or replacement of BQ2083DBT-V1P3?
All BQ2083DBT-V1P3 units undergo pre-shipment inspection (PSI). If there is an issue with BQ2083DBT-V1P3, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BQ2083DBT-V1P3 part is unused and in its original packaging.
Return procedure for BQ2083DBT-V1P3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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