My Inquiry
My Account
Texas Instruments BQ2083DBTR
- Part No.:
- BQ2083DBTR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 38-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ2083DBTR.pdf
- Description:
- IC GAS GAUGE FOR BQ29311 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,012
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BQ2083DBTR from Texas Instruments is a Smart Battery Specification (SBS) v1.1-compliant fuel gauge IC for Li-ion and Li-polymer battery packs, featuring a 16-bit integrating ADC with <1-µV offset error, self-calibrating coulomb counting, and integrated 512-byte flash memory for cell modeling. It interfaces with the bq29311 AFE to support 10.8-V or 14.4-V 3–4-cell packs in notebook PCs and portable instrumentation.
For engineers reviewing the BQ2083DBTR datasheet, BQ2083DBTR pinout, BQ2083DBTR application, or BQ2083DBTR equivalent, this page delivers verified technical context, SMBus timing compliance, LED display drive capability, voltage/temperature measurement resolution, and real-world gas-gauge calibration behavior - all specific to the tape-and-reel BQ2083DBTR variant.
Technical Context
The BQ2083DBTR implements dual sigma-delta ADC architecture: one 16-bit integrating converter for current sensing across SR1/SR2 (resolution <3-nVh, offset <1 µV), and a second 16-bit converter for voltage and temperature measurements. It executes SBS v1.1 commands over SMBus 2-wire interface at up to 100 kHz with built-in timeout and clock-stretching support.
Its RISC CPU core manages real-time capacity estimation using programmable cell modeling stored in on-chip 512-byte flash, performs automatic offset calibration during 20-s SMBus idle periods, and applies voltage-based corrections (EDV0/EDV1/EDV2) and midrange VOC25/VOC50/VOC75 adjustments to RemainingCapacity() based on validated discharge conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.0 V to 3.6 V for both analog (VDDA) and digital (VDDD) domains - ensures stable operation across Li-ion pack voltage ranges |
| Integrating ADC Resolution | <3-nVh - enables sub-milliamp-hour accuracy in coulomb counting for multi-hour runtime estimation |
| Offset Error | <1 µV - minimizes zero-current drift in high-precision charge/discharge tracking |
| SMBus Frequency | 10–100 kHz - supports standard system management bus communication without external clocking |
| Operating Temperature | −20°C to +85°C - qualified for industrial and mobile computing environments |
| Data Flash Retention | 10 years - preserves calibrated cell model parameters and configuration across product lifecycle |
| LED Drive Outputs | 5 dedicated open-drain outputs (LED1–LED5) - directly drives 3-/4-/5-segment displays for visual state-of-charge indication |
Pinout & Package
38-pin TSSOP (DBT) package with exposed thermal pad; lead-free and RoHS compliant per TI documentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Analog input | Accepts single-cell voltage from bq29311 for individual cell monitoring via VCELL routing |
| SR1 / SR2 | Differential current sense inputs | Monitor voltage drop across 10–20 mΩ sense resistor for bidirectional coulomb counting |
| TS | Analog input | Connects to NTC thermistor (e.g., Semitec 103AT) for battery temperature measurement |
| SMBC / SMBD | Open-drain bidirectional I/O | Implement SMBus 2-wire interface for SBS command exchange with host controller |
| LED1–LED5 | Open-drain outputs | Drive external LEDs in 3-/4-/5-segment configurations for 20%/25%/33% capacity increments |
| RBI | Analog input | Provides backup power (≥1.3 V) to retain register data during main supply brownout |
Key Features
| Feature | Design Value |
|---|---|
| Self-calibrating integrating ADC | Automatically corrects SR1/SR2 offset down to 1 µV during 20-s SMBus idle - eliminates manual calibration in production |
| Programmable cell modeling | 512-byte internal flash stores nominal capacity, self-discharge rate, and temperature compensation coefficients - enables accurate runtime prediction under varying load/temperature |
| Smart Battery Specification v1.1 compliance | Supports full SBData command set including RemainingCapacity(), FullChargeCapacity(), and Temperature() - ensures interoperability with SBS hosts |
| Voltage-based capacity correction | Applies EDV0/EDV1/EDV2 thresholds and VOC25/VOC50/VOC75 midrange corrections to RemainingCapacity() - maintains accuracy across discharge curve nonlinearity |
| Glueless AFE interface | Direct connection to bq29311 via SDATA/SCLK/SAFE/EVENT pins - removes need for level shifters or discrete logic in protection circuitry |
Applications
| Notebook PC Battery Packs | Medical Portable Monitors |
|---|---|
Use Scenario: Integrated into 3–4-cell Li-ion battery packs powering ultraportable laptops with Windows/Linux OS power management. IC Role / Device Role / Timing Role: Primary SBS-compliant fuel gauge providing RemainingCapacity(), RunTimeToEmpty(), and battery status over SMBus to EC/ECU. Use Value: Enables precise low-battery warnings and hibernation triggers via EDV2 threshold detection and self-discharge compensation at ambient temperatures. |
Use Scenario: Embedded in sealed battery modules for handheld ECG or blood glucose analyzers requiring FDA-compliant runtime reporting. IC Role / Device Role / Timing Role: Standalone gas gauge with internal temperature sensor option and flash-retained calibration - no external EEPROM required. Use Value: Maintains ±3% capacity accuracy over 500+ cycles using programmable self-discharge rate and midrange VOC50 correction at 25°C. |
| Test Equipment Power Modules | Industrial Handheld Scanners |
Use Scenario: Used in benchtop multimeters and oscilloscope battery packs where firmware updates must preserve fuel gauge calibration. IC Role / Device Role / Timing Role: Host-managed fuel gauge with SMBus master/slave flexibility and 10-year flash data retention for configuration persistence. Use Value: Eliminates field recalibration after firmware upgrade by storing cell model parameters in on-chip flash, not external memory. |
Use Scenario: Deployed in warehouse barcode scanners operating 12+ hours per charge in variable-temperature logistics environments. IC Role / Device Role / Timing Role: Real-time coulomb counter with temperature-compensated self-discharge modeling and LED capacity display. Use Value: Extends usable runtime by 8–12% versus fixed-model gauges through dynamic adjustment of discharge rate vs. temperature (e.g., 2× rate at 35°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fuel gauge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ2084DBTR | Same pinout and firmware-compatible; adds enhanced self-discharge modeling and extended temperature range (−40°C to +85°C) | Required for automotive-qualified or extended-cold-environment designs where BQ2083DBTR's −20°C min rating is insufficient | Select BQ2084DBTR only if operation below −20°C or tighter self-discharge compensation at extremes is mandatory |
| BQ20Z75DBTR | Successor device with integrated 10-bit ADC, higher SMBus speed (400 kHz), and expanded flash (2 KB); not pin-compatible | Targets next-gen designs needing faster host communication, larger configuration space, and improved manufacturing test coverage | Choose BQ20Z75DBTR for new designs requiring future-proofing, but expect PCB redesign and firmware migration effort |
Compared with BQ2083DBTR, BQ2084DBTR offers identical form-factor compatibility with extended thermal qualification, while BQ20Z75DBTR provides architectural upgrades at the cost of layout changes - making BQ2083DBTR optimal for cost-sensitive, volume-production notebook and medical applications within its −20°C to +85°C envelope.
Availability
BQ2083DBTR is available at Aetrix Electronics and suitable for notebook PC battery packs, portable medical monitors, test equipment power modules, and industrial handheld scanners requiring stable component supply and long-term obsolescence management.
Supply support for BQ2083DBTR 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 company specializing in analog, embedded processing, and power management technologies with over 50 years of innovation in battery management systems.
The BQ2083DBTR belongs to TI's Smart Battery Fuel Gauge IC product line, designed specifically for high-accuracy, low-power coulomb counting in multi-cell Li-ion/Li-polymer packs used in portable computing and portable instrumentation.
FAQ
What is the primary function of the BQ2083DBTR in a battery pack?
The BQ2083DBTR serves as an SBS v1.1-compliant fuel gauge IC that accurately tracks remaining battery capacity using coulomb counting, voltage/temperature monitoring, and programmable cell modeling. It reports RemainingCapacity(), FullChargeCapacity(), and other SBS registers over SMBus to enable intelligent power management in systems like notebook PCs. The BQ2083DBTR integrates flash memory to store calibration data and supports direct interfacing with the bq29311 AFE for complete pack electronics.
Does the BQ2083DBTR require external EEPROM for configuration storage?
No, the BQ2083DBTR contains 512 bytes of internal flash memory that stores configuration data such as nominal capacity, self-discharge rate, temperature compensation coefficients, and cell-modeling parameters. This eliminates the need for external EEPROM and simplifies BOM while ensuring data retention for 10 years. The BQ2083DBTR uses this flash to maintain calibrated fuel gauge accuracy across operating conditions without relying on external nonvolatile memory.
How does the BQ2083DBTR perform offset calibration on its current-sense inputs?
The BQ2083DBTR performs automatic offset calibration on SR1/SR2 inputs when the SMBus lines remain low for at least 20 seconds - a condition typically met during system idle or suspend states. During calibration, it measures and cancels inherent amplifier offset down to less than 1 µV, ensuring high-accuracy coulomb counting without manual intervention. This self-calibration is integral to the BQ2083DBTR's design and occurs transparently during normal operation without host software involvement.
Can the BQ2083DBTR drive LED displays directly, and how many segments does it support?
Yes, the BQ2083DBTR features five dedicated open-drain LED driver outputs (LED1–LED5) that directly drive external LEDs without additional transistors or drivers. It supports 3-, 4-, or 5-segment displays to indicate remaining capacity in 20%, 25%, or 33% increments respectively. The DISP pin controls display mode selection, and the BQ2083DBTR handles segment activation timing internally - enabling simple, low-cost visual battery status feedback in portable devices.
What is the role of the RBI pin on the BQ2083DBTR, and what voltage is required?
The RBI (Register Backup Input) pin on the BQ2083DBTR provides backup power to retain critical register contents during main supply brownout or shutdown. It requires a minimum of 1.3 V applied via a storage capacitor or auxiliary battery source. With RBI active, the BQ2083DBTR maintains data integrity in registers like RemainingCapacity() and FullChargeCapacity() even when VDDD drops below the POR threshold - ensuring accurate state-of-charge recovery after power interruption. The BQ2083DBTR draws only 10–100 nA from RBI under backup conditions.
BQ2083DBTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
BQ2083DBTR FAQ
1.How can I place an order for BQ2083DBTR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ2083DBTR 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 BQ2083DBTR reliable?
The price and inventory of BQ2083DBTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ2083DBTR is usually 5 days.
3.What payment methods are accepted for BQ2083DBTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ2083DBTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ2083DBTR?
BQ2083DBTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ2083DBTR 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 BQ2083DBTR?
For technical support, including BQ2083DBTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ2083DBTR requirements.
6.How does Aetrix verify that BQ2083DBTR is sourced from the original manufacturer or authorized distributors?
All BQ2083DBTR 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 BQ2083DBTR meets industry standards.
7.What is the process for return or replacement of BQ2083DBTR?
All BQ2083DBTR units undergo pre-shipment inspection (PSI). If there is an issue with BQ2083DBTR, 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 BQ2083DBTR part is unused and in its original packaging.
Return procedure for BQ2083DBTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ2083DBTR Tags
-
BQ29700DSER
Texas Instruments
-
S-8241ABKMC-GBKT2G
ABLIC Inc.
-
S-8241ABPMC-GBPT2G
ABLIC Inc.
-
BQ27427YZFR
Texas Instruments
-
BQ27426YZFR
Texas Instruments
-
STC3117IJT
STMicroelectronics
-
STC3115IJT
STMicroelectronics
-
BQ76925RGER
Texas Instruments
-
NPM1100-QDAA-R
Nordic Semiconductor ASA
-
BQ27441DRZR-G1A
Texas Instruments
-
STC3115AIQT
STMicroelectronics
-
S-8252AAL-M6T1U
ABLIC Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
