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Texas Instruments BQ2083DBTR-V1P3
- Part No.:
- BQ2083DBTR-V1P3
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 38-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ2083DBTR-V1P3.pdf
- Description:
- IC GAS GAUGE FOR BQ29311 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,937
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Product details
Overview
BQ2083DBTR-V1P3 from Texas Instruments is a Smart Battery Specification (SBS) v1.1-compliant fuel 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 up to 5-segment LED displays. It operates in 10.8-V or 14.4-V packs with the bq29311 AFE and supports SMBus 2-wire communication.
For engineers reviewing the BQ2083DBTR-V1P3 datasheet, BQ2083DBTR-V1P3 pinout, BQ2083DBTR-V1P3 application, or BQ2083DBTR-V1P3 equivalent, key selection criteria include integrated flash-based cell modeling, ±0.009% INL ADC accuracy, 38-pin TSSOP package compatibility, SMBus timing compliance (10–100 kHz), and support for qualified discharge learning of FullChargeCapacity.
Technical Context
The BQ2083DBTR-V1P3 implements dual sigma-delta ADCs: one dedicated to high-resolution current sensing across SR1/SR2 (−0.3 V to +1.0 V input range), and another for simultaneous voltage and temperature measurement. Its RISC CPU executes gas-gauge algorithms including dynamic self-discharge compensation (temperature-dependent scaling), midrange voltage corrections (VOC25/VOC50/VOC75), and EDV-based RM register calibration at three low-voltage thresholds.
It interfaces gluelessly with the bq29311 AFE via SCLK/SDATA lines, receives cell voltage through VIN, and uses CLKOUT/XCK1/XCK2 for 32.768-kHz crystal timing. Safety control is implemented via SAFE output and EVENT input from bq29311, while RBI enables data register backup during brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Resolution | 16-bit integrating converter for current; 16-bit delta-sigma for voltage/temp - enables <3-nVh coulomb counting resolution and <0.009% INL accuracy |
| Offset Error | <1 µV typical - ensures minimal zero-current drift in charge/discharge accumulation over temperature |
| SMBus Frequency | 10–100 kHz - supports standard system management bus timing without external clock conditioning |
| Operating Temp | −20°C to +85°C - validated for notebook PC and portable instrumentation thermal environments |
| Supply Voltage | VDDA/VDDD = 3.0–3.6 V - matches common Li-ion pack LDO outputs and eliminates need for external regulators |
| Data Flash | 512 bytes - stores programmable cell model parameters (nominal capacity, self-discharge rate, rate compensation) |
| LED Drive | 5-channel open-drain outputs (LED1–LED5) - directly drives discrete LEDs for 20%/25%/33% remaining capacity indication |
Pinout & Package
38-pin TSSOP (DBT) package with exposed thermal pad; RoHS-compliant, tape-and-reel delivery (R suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Analog input | Receives single-cell voltage from bq29311 for individual cell monitoring and scaling |
| SR1 / SR2 | Analog current sense inputs | Accepts differential voltage across 10–20 mΩ sense resistor for bidirectional coulomb counting |
| TS | Analog temperature input | Connects to NTC thermistor (e.g., Semitec 103AT) or internal sensor for thermal compensation |
| SMBC / SMBD | Open-drain bidirectional I/O | SMBus clock/data interface for host communication; supports 10–100 kHz timing per spec |
| LED1–LED5 | Open-drain outputs | Drive external LEDs without current-limiting resistors; each sinks ≥10 mA at 0.4 V max VOL |
| RBI | Analog backup supply | Accepts capacitor or battery input to retain data registers during VDD brownout |
| SAFE | Digital output | Asserts safety signal (e.g., fuse blow command) based on bq29311 fault detection |
Key Features
| Feature | Design Value |
|---|---|
| Self-calibrating integrating ADC | Automatically cancels SR1/SR2 offset down to ≤1 µV without host intervention or external calibration cycles |
| Programmable cell modeling | 512-byte flash stores chemistry-specific parameters (rate/temp compensation, self-discharge profile) for accurate SoC tracking |
| Qualified discharge learning | Updates FullChargeCapacity only after verified full discharge (RM ≥ FCC − Near Full to EDV2) with no charge activity or overload |
| Voltage-based RM correction | Applies three-stage EDV0/EDV1/EDV2 calibration (0%, 3%, Battery Low%) to correct coulomb count drift at low voltage |
| Midrange VOC correction | Adjusts RemainingCapacity at VOC25/VOC50/VOC75 thresholds when current is near zero and temp is 19–31°C |
Applications
| Notebook PCs | Medical Equipment |
|---|---|
Use Scenario: Real-time battery run-time prediction and state-of-charge display in clamshell laptops with hot-swappable smart battery packs. IC Role / Device Role / Timing Role: Primary fuel gauge IC reporting RemainingCapacity, Voltage, Temperature, and RunTimeToEmpty over SMBus to EC/BIOS. Use Value: Enables precise low-battery warnings and graceful OS shutdown before EDV2 threshold, reducing unexpected power loss. | Use Scenario: Power management in portable ultrasound or infusion pumps requiring FDA-compliant battery health logging. IC Role / Device Role / Timing Role: Monitors self-discharge, qualifies discharge cycles, and stores calibrated FCC/DCR values in nonvolatile flash for audit trails. Use Value: Maintains ±2% SoC accuracy over 500+ cycles by applying temperature-compensated self-discharge and VOC midrange corrections. |
| Test Equipment | Portable Instrumentation |
Use Scenario: Battery-powered oscilloscopes and multimeters needing stable runtime estimation across −10°C to +60°C ambient. IC Role / Device Role / Timing Role: Integrates current via SR1/SR2, measures TS thermistor voltage, and reports Current/Temp/Voltage every second. Use Value: Delivers <0.009% INL voltage measurement and ≤1-µV offset stability to prevent SoC drift during extended field use. | Use Scenario: Handheld gas analyzers or environmental sensors operating on 3S/4S Li-ion packs with LED capacity indicators. IC Role / Device Role / Timing Role: Drives 5-segment LED display (LED1–LED5) with 20%/25%/33% increments and accepts push-button input via DISP pin. Use Value: Provides intuitive visual battery status without MCU intervention, reducing BOM cost and firmware complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fuel gauge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ2084DBTR-V1P3 | Same pinout and firmware architecture; adds support for 6-cell configurations and enhanced cell balancing control signals | Required for 18-V (5S) or 21.6-V (6S) battery packs; not drop-in for 10.8-V/14.4-V designs | Select BQ2084DBTR-V1P3 only when expanding beyond 4-series cells or requiring additional AFE coordination logic |
| BQ20Z75-V163 | Later-generation SBS v1.1 device with embedded 256 kB flash, higher SMBus speed (up to 400 kHz), and improved 0.5% SoC accuracy over life | Targets new designs requiring longer lifecycle support, enhanced security features, and backward-compatible register mapping | Choose BQ20Z75-V163 for new product introductions where TI's long-term availability and extended diagnostics are prioritized |
Compared with BQ2083DBTR-V1P3, BQ2084DBTR-V1P3 extends cell count support but requires hardware validation for 5S/6S topologies, while BQ20Z75-V163 offers superior accuracy and flash capacity at the cost of higher unit price and revised layout constraints.
Availability
BQ2083DBTR-V1P3 is available at Aetrix Electronics and suitable for notebook PCs, medical equipment, and portable instrumentation requiring stable component supply, long-lifecycle support, and SBS v1.1 compliance.
Supply support for BQ2083DBTR-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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management technologies.
The BQ2083DBTR-V1P3 belongs to TI's Smart Battery Fuel Gauge IC product line, designed specifically for accurate Li-ion/Li-polymer state-of-charge estimation in portable systems using coulomb counting, voltage-based calibration, and programmable cell modeling.
FAQ
What is the primary function of the BQ2083DBTR-V1P3 in a battery management system?
The BQ2083DBTR-V1P3 serves as a Smart Battery Specification v1.1-compliant fuel gauge IC that accurately tracks remaining capacity in Li-ion and Li-polymer battery packs. It performs real-time coulomb counting using a self-calibrating 16-bit integrating ADC, applies temperature- and rate-compensated cell modeling, and communicates results-including RemainingCapacity, Voltage, Temperature, and RunTimeToEmpty-over SMBus. The BQ2083DBTR-V1P3 also drives LED indicators and supports qualified discharge learning to update FullChargeCapacity.
How does the BQ2083DBTR-V1P3 achieve high-accuracy current measurement?
The BQ2083DBTR-V1P3 achieves high-accuracy current measurement using a dedicated 16-bit integrating sigma-delta ADC with ≤1-µV typical offset error and better than 3-nVh resolution. It samples the differential voltage across an external sense resistor (10–20 mΩ) connected between SR1 and SR2 pins, continuously integrates charge flow, and self-calibrates when SMBus lines remain low for ≥20 seconds. This architecture minimizes drift and enables precise coulomb counting even under low-current or transient load conditions.
Can the BQ2083DBTR-V1P3 operate without an external crystal oscillator?
No, the BQ2083DBTR-V1P3 requires a 32.768-kHz crystal connected between XCK1 and XCK2 pins for accurate timebase generation essential to coulomb integration and self-discharge timing. While it includes internal oscillator circuitry, the datasheet specifies crystal operation for guaranteed timing accuracy; standalone RC oscillators are not supported. The CLKOUT pin provides a buffered 32.768-kHz output to synchronize the bq29311 AFE, confirming crystal dependency.
What safety functions does the BQ2083DBTR-V1P3 support in conjunction with the bq29311 AFE?
The BQ2083DBTR-V1P3 supports coordinated safety functions with the bq29311 AFE via dedicated interface pins: SAFE output asserts critical protection signals (e.g., fuse blow), EVENT input receives XALERT fault alerts from bq29311, and SCLK/SDATA enable glueless communication for cell balancing and overvoltage/undervoltage response. It does not implement standalone protection but relies on this tightly coupled interface to trigger safety actions based on validated voltage, temperature, and current measurements.
Does the BQ2083DBTR-V1P3 support internal temperature sensing, and how is it configured?
Yes, the BQ2083DBTR-V1P3 supports internal temperature sensing via its on-die thermal sensor. Configuration requires setting bit 7 (IT) in Misc Configuration Data Flash location 0x2a and updating TS Const1–TS Const4 coefficients (0xa4–0xad) to prescribed internal-sensor values. When enabled, the IC bypasses the external TS pin and uses die temperature for self-discharge compensation and EDV calibration-ideal for space-constrained designs where NTC placement is impractical.
BQ2083DBTR-V1P3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-V1P3 FAQ
1.How can I place an order for BQ2083DBTR-V1P3 through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ2083DBTR-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 BQ2083DBTR-V1P3 reliable?
The price and inventory of BQ2083DBTR-V1P3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ2083DBTR-V1P3 is usually 5 days.
3.What payment methods are accepted for BQ2083DBTR-V1P3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ2083DBTR-V1P3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ2083DBTR-V1P3?
BQ2083DBTR-V1P3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ2083DBTR-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 BQ2083DBTR-V1P3?
For technical support, including BQ2083DBTR-V1P3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ2083DBTR-V1P3 requirements.
6.How does Aetrix verify that BQ2083DBTR-V1P3 is sourced from the original manufacturer or authorized distributors?
All BQ2083DBTR-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 BQ2083DBTR-V1P3 meets industry standards.
7.What is the process for return or replacement of BQ2083DBTR-V1P3?
All BQ2083DBTR-V1P3 units undergo pre-shipment inspection (PSI). If there is an issue with BQ2083DBTR-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 BQ2083DBTR-V1P3 part is unused and in its original packaging.
Return procedure for BQ2083DBTR-V1P3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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