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Texas Instruments BQ2063DBQ
- Part No.:
- BQ2063DBQ
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 28-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
BQ2063DBQ.pdf
- Description:
- IC GAS GAUGE LI-ION 28SSOP/QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,889
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Product details
Overview
BQ2063DBQ from Texas Instruments is a Smart Battery System (SBS)-compliant gas gauge IC for Li-ion battery packs, performing real-time charge tracking via V-to-F conversion and 15-bit ADC-based voltage/temperature/current measurement. It directly interfaces the Seiko S-8243 protection IC, supports SMBus v1.1 with PEC and HDQ16 single-wire protocols, and drives 4- or 5-segment LED displays for remaining capacity indication in portable medical devices and industrial handhelds.
For engineers reviewing the BQ2063DBQ datasheet, BQ2063DBQ pinout, BQ2063DBQ application, or BQ2063DBQ equivalent, key selection considerations include its 28-pin SSOP package, ±16 µV calibrated offset in charge counting, dual-interface support (SMBus/HDQ16), integrated LED drivers, and compatibility with external EEPROM for chemistry-specific calibration and self-discharge compensation.
Technical Context
The BQ2063DBQ implements a fully differential, dynamically balanced voltage-to-frequency converter (VFC) for high-accuracy charge/discharge integration and a sigma-delta ADC for simultaneous voltage (VCELL), temperature (TS), and current (SRC) sampling every 2–2.2 seconds. Its VFC achieves <16 µV calibrated offset and supports bipolar input range of ±250 mV across SR1/SR2.
It executes voltage-based capacity correction at three programmable end-of-discharge thresholds (EDV0/EDV1/EDV2) and performs midrange corrections at VOC25/VOC50/VOC75. The device uses EEPROM-stored parameters-including self-discharge rate, rate-compensation factors, and cell-specific EDV coefficients-to adapt RM (RemainingCapacity) in real time based on temperature, load, and usage history.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VFC Offset (Calibrated) | <±16 µV - enables sub-mAh charge counting accuracy over full temperature range |
| ADC Resolution | 15-bit - provides precise voltage (mV), temperature (0.1°K), and current (mA) reporting |
| SMBus Frequency | 10–100 kHz - ensures robust communication in noisy embedded systems with PEC error checking |
| HDQ16 Interface | Single-wire bidirectional - reduces PCB routing complexity vs. SMBus in space-constrained battery packs |
| Operating Temp Range | −20°C to +70°C - validated for industrial and portable equipment environments |
| Supply Voltage | 2.7 V to 3.7 V - matches typical Li-ion pack voltage during discharge without external LDO |
| Quiescent Current | <235 µA - extends shelf life and standby runtime in always-on battery management systems |
Pinout & Package
28-pin 150-mil SSOP (DBQ) package with exposed pad not electrically connected; RoHS-compliant, surface-mount assembly compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SR1, SR2 | Current-sense resistor inputs | Differential inputs to VFC for charge/discharge flow monitoring; supports ±250 mV bipolar range |
| VCELL | Cell voltage input | Accepts individual cell voltages from S-8243 via CTL3/CTL4 sequencing; enables per-cell monitoring in 3–4S packs |
| TS, THON | Thermistor interface | TS reads NTC voltage; THON switches bias current ON for 60 ms during measurement to minimize self-heating error |
| SMBC, SMBD | SMBus interface | Open-drain bidirectional lines supporting 10–100 kHz clock/data; require external pull-ups per SMBus v1.1 |
| HDQ16 | Single-wire interface | Open-drain bidirectional port with 190–250 µs cycle timing; eliminates second signal trace in compact designs |
| LED1–LED5 | LED segment drivers | 5 independent open-drain outputs capable of driving discrete LEDs or LED driver ICs for 20%/25% capacity steps |
| CTL2–CTL4 | S-8243 control outputs | 3-state signals that sequence S-8243 to present individual cell voltages at VCELL; reduce external logic count |
| RBI | Register backup input | Accepts capacitor or auxiliary battery to retain register state during main supply brownout or removal |
Key Features
| Feature | Design Value |
|---|---|
| Auto-offset calibration | Initiated via ManufacturerAccess() command; cancels SR1/SR2 offset down to <1 µV resolution |
| Programmable self-discharge model | Adjusts RemainingCapacity every 6750 s at 35°C (for 2.5%/day @25°C), with 0.39% granularity and temperature scaling per Table 3 |
| Voltage-based capacity correction | Applies RM adjustments at EDV0 (0%), EDV1 (3%), EDV2 (Battery Low %) and VOC25/VOC50/VOC75 thresholds |
| Qualified FCC learning | Updates FullChargeCapacity only after verified discharge from ≥FCC − Near Full×2 to EDV2 with no charge <10 mAh |
| External EEPROM dependency | Stores chemistry, calibration, EDV coefficients, and self-discharge rate-enabling field-updatable battery models |
Applications
| Medical Portable Monitors | Industrial Handheld Scanners |
|---|---|
Use Scenario: Battery-powered ECG and pulse oximetry units requiring accurate runtime prediction and low-power sleep mode. IC Role / Device Role / Timing Role: Gas gauge IC performing continuous charge integration, temperature-compensated self-discharge modeling, and SMBus reporting of RemainingCapacity and RunTimeToEmpty. Use Value: Enables >98% capacity estimation accuracy over 300+ cycles by combining VFC charge counting with voltage-based EDV correction and EEPROM-stored aging parameters. |
Use Scenario: Rugged barcode scanners used in warehouse logistics with frequent partial charge/discharge cycles. IC Role / Device Role / Timing Role: Primary fuel gauge interfacing S-8243 protection IC and driving 5-segment LED display for intuitive capacity feedback. Use Value: Delivers stable capacity tracking despite variable loads and ambient temperatures (−20°C to 70°C) using adaptive self-discharge scaling and light-discharge current compensation. |
| Laptop Battery Packs | Test & Measurement Equipment |
Use Scenario: 4-cell Li-ion smart battery modules compliant with SBS v1.1 for OEM laptop platforms. IC Role / Device Role / Timing Role: SBS-compliant gas gauge communicating via SMBus with host system BIOS and supporting PEC for data integrity. Use Value: Provides certified RemainingCapacity, Temperature, and BatteryStatus registers required for Windows ACPI battery reporting and thermal throttling coordination. |
Use Scenario: Portable oscilloscopes and multimeters needing precise battery runtime under mixed analog/digital loads. IC Role / Device Role / Timing Role: High-precision coulomb counter with 15-bit ADC and <16 µV VFC offset, reporting Current and AverageCurrent every 2.2 s. Use Value: Achieves ±0.5% charge tracking accuracy across discharge profiles by combining VFC integration with sigma-delta ADC cross-validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar gas gauge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ2060A | Legacy 20-pin TSSOP; lacks HDQ16 interface, uses older SMBus-only protocol; no LED drivers | Requires external LED driver IC and separate thermistor bias circuit; limited to SMBus-only host systems | Select only if footprint and legacy firmware compatibility outweigh need for single-wire interface and integrated display control |
| BQ2083 | Enhanced 28-pin SSOP with integrated 16-bit ADC, higher-resolution VFC, and extended EEPROM map for multi-chemistry support | Supports NiMH and LiFePO₄ in addition to Li-ion; includes enhanced safety features like overvoltage lockout | Prefer for new designs requiring broader chemistry support, improved accuracy, or future-proofing beyond Li-ion SBS compliance |
Compared with BQ2063DBQ, BQ2060A requires additional components and offers reduced interface flexibility, while BQ2083 delivers higher precision and multi-chemistry capability at the cost of increased configuration complexity and higher unit price.
Availability
BQ2063DBQ is available at Aetrix Electronics and suitable for medical portable monitors, industrial handheld scanners, laptop battery packs, and test & measurement equipment requiring stable component supply, long-term lifecycle support, and validated SBS v1.1 compliance.
Supply support for BQ2063DBQ 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 decades of leadership in battery management ICs.
The BQ2063DBQ belongs to TI's Smart Battery Fuel Gauge product line, designed specifically for accurate Li-ion capacity tracking in portable and industrial battery packs using V-to-F conversion and EEPROM-based adaptive modeling.
FAQ
What communication interfaces does the BQ2063DBQ support?
The BQ2063DBQ supports both SMBus v1.1 (2-wire with PEC) and HDQ16 (single-wire) protocols. SMBus enables full SBS register access and error-checked data transfer, while HDQ16 reduces pin count and routing complexity in space-constrained battery packs. Both interfaces are electrically isolated and operate across the full −20°C to +70°C temperature range with validated timing margins.
How does the BQ2063DBQ achieve high-accuracy charge counting?
The BQ2063DBQ achieves high-accuracy charge counting using a fully differential voltage-to-frequency converter (VFC) with auto-calibration that reduces offset to <±16 µV after calibration. It integrates current through SR1/SR2 sense resistor inputs, supports ±250 mV bipolar range, and cross-validates with 15-bit sigma-delta ADC measurements of voltage, temperature, and current every 2–2.2 seconds.
Can the BQ2063DBQ monitor individual cell voltages in a multi-cell Li-ion pack?
Yes, the BQ2063DBQ monitors individual cell voltages in 3- or 4-series Li-ion packs by directly interfacing the Seiko S-8243 protection IC. Using CTL2–CTL4 outputs, it sequences the S-8243 to present each cell's voltage at the VCELL pin. These values are stored in VCELL1–VCELL4 registers and used to compute pack voltage and detect cell imbalance.
What role does the external EEPROM play in BQ2063DBQ operation?
The external EEPROM stores critical configuration data for the BQ2063DBQ, including battery chemistry, design capacity/voltage, self-discharge rate, EDV thresholds, rate-compensation factors, and calibration coefficients. The BQ2063DBQ reads this data at startup and during operation to adapt RemainingCapacity calculations for temperature, load, and aging-enabling field-updatable battery models without firmware changes.
Does the BQ2063DBQ support LED display output, and how is it configured?
Yes, the BQ2063DBQ integrates five open-drain LED drivers (LED1–LED5) supporting 4- or 5-segment displays. Display behavior is controlled via the DISP input and programmed in EEPROM to indicate remaining capacity in 20% or 25% increments. Each LED output can drive standard 20 mA LEDs directly or interface with external LED driver ICs for higher brightness or multiplexed displays.
BQ2063DBQ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-SSOP (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Battery Monitor
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- -
- Fault Protection:
- -
- Interface:
- SMBus
- Operating Temperature:
- -20°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SSOP
BQ2063DBQ FAQ
1.How can I place an order for BQ2063DBQ through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ2063DBQ 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 BQ2063DBQ reliable?
The price and inventory of BQ2063DBQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ2063DBQ is usually 5 days.
3.What payment methods are accepted for BQ2063DBQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ2063DBQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ2063DBQ?
BQ2063DBQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ2063DBQ 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 BQ2063DBQ?
For technical support, including BQ2063DBQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ2063DBQ requirements.
6.How does Aetrix verify that BQ2063DBQ is sourced from the original manufacturer or authorized distributors?
All BQ2063DBQ 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 BQ2063DBQ meets industry standards.
7.What is the process for return or replacement of BQ2063DBQ?
All BQ2063DBQ units undergo pre-shipment inspection (PSI). If there is an issue with BQ2063DBQ, 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 BQ2063DBQ part is unused and in its original packaging.
Return procedure for BQ2063DBQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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