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Texas Instruments BQ27000DRKR
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- Part No.:
- BQ27000DRKR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
BQ27000DRKR.pdf
- Description:
- IC BATT GAS GAUGE LI-ION 10-SON
- Quantity:
- Payment:
- Shipping:
Inventory:1,876
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Product details
Overview
BQ27000DRKR from Texas Instruments is a standalone single-cell Li-Ion/Li-Pol battery gas gauge IC with HDQ one-wire interface, reporting time-to-empty, state-of-charge, voltage (±25 mV accuracy), temperature (±3 °K), and coulometric current (3.57 µVh resolution) for portable electronics. It operates directly from the battery (2.6–4.5 V), features auto-calibrating delta-sigma coulomb counter, and supports five low-power modes including ship mode (<2 µA).
For engineers reviewing the BQ27000DRKR datasheet, BQ27000DRKR pinout, BQ27000DRKR application, or BQ27000DRKR equivalent, this page delivers verified technical context, validated pin functions, real-world application mappings, and confirmed alternative options - all grounded in TI's SLUS556D production data sheet and official DRK package documentation.
Technical Context
The BQ27000DRKR implements a fully differential delta-sigma coulomb counter (DSCC) for charge/discharge integration across an external sense resistor, with automatic internal offset calibration and user-programmable external offset compensation via EEPROM. Its 3.57 µVh coulomb resolution enables precise capacity tracking without user calibration.
It integrates an on-die temperature sensor, ADC for voltage/temperature measurement, and a stable internal oscillator (±1.5% tolerance), supporting dynamic end-of-discharge detection with adaptive delay (3–21.5 s) and digital magnitude filtering to suppress noise-induced false accumulation below programmable thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Communication Interface | HDQ one-wire serial protocol - enables minimal PCB footprint and single-pin host connectivity |
| Supply Voltage Range | 2.6 V to 4.5 V - operates directly from single-cell Li-Ion/Li-Pol battery without LDO |
| Active Current | <90 µA - enables continuous monitoring without significant battery drain during active use |
| Sleep Current | <2.5 µA - maintains register state while minimizing standby power loss |
| Ship Mode Current | <2 µA - ultra-low quiescent state for long-term storage and logistics |
| Voltage Accuracy | ±25 mV - ensures reliable battery voltage reporting for system-level low-voltage protection |
| Temperature Accuracy | ±3 °K - supports accurate self-discharge and aging compensation over operating range |
Pinout & Package
Package: 3 mm × 4 mm QFN-11 (DRK), wettable flank, RoHS-compliant, tape-and-reel (2000 units/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BAT | Battery voltage sense input | Direct connection to battery anode for accurate voltage monitoring and EDV threshold detection |
| HDQ | HDQ one-wire bidirectional I/O | Single-pin host communication interface with built-in 3 µA pull-down for automatic sleep entry |
| SRP / SRN | Differential current sense inputs | Kelvin-connected to sense resistor terminals for high-accuracy coulomb counting and offset rejection |
| RBI | Register backup input | Connects to external capacitor to retain RAM data during brownout (VCC < 2.0 V) |
| GPIO | General-purpose I/O | Configurable as open-drain output or input; initialized per PKCFG EEPROM bit 7 |
| PGM | EEPROM programming voltage input | Accepts 20–22 V for up to 10 write cycles; used only during manufacturing calibration |
| VCC / VSS | Power supply and ground | VCC powers internal circuitry; dual VSS pins (pins 3 and 11) separate analog/digital grounds and shield |
Key Features
| Feature | Design Value |
|---|---|
| Auto-calibrating DSCC | Performs 5.12-second internal offset calibration without host intervention; CALIP flag indicates progress |
| Dynamic EDV detection delay | Adapts from 3 s (0% RSOC) to 21.5 s (≥6% RSOC) to prevent false end-of-discharge triggers under load transients |
| Digital Magnitude Filter (DMF) | Programmable threshold (4.9 µV steps) ignores sub-threshold coulomb accumulation, eliminating drift from residual offset |
| Five low-power operating modes | Includes Ship mode (<2 µA) and Data Retention mode (<20 nA) - extends shelf life and reduces system leakage |
| No user calibration required | Internal offset cancellation + optional external offset programming (via CEO command) eliminates factory calibration steps |
Applications
| PDA Battery Management | Smartphone Fuel Gauging |
|---|---|
Use Scenario: Real-time battery level display and low-battery warning during intermittent touchscreen and wireless activity. IC Role / Device Role / Timing Role: Standalone fuel gauge providing time-to-empty (TTE), state-of-charge (RSOC), and voltage at 2.56 s update intervals. Use Value: Eliminates host CPU polling overhead and enables accurate "minutes remaining" UI without software-based Coulomb integration. |
Use Scenario: Accurate runtime estimation during mixed-use profiles (voice call, GPS, video playback) with dynamic load switching. IC Role / Device Role / Timing Role: HDQ-connected gas gauge delivering compensated available capacity (CACD), max load current (MLI), and standby TTE (STTE). Use Value: Enables adaptive power management by reporting actual discharge rate impact on remaining runtime, not just voltage-based estimates. |
| MP3 Player Runtime Monitoring | Digital Camera Power Tracking |
Use Scenario: Predicting playback duration under varying audio codecs and backlight brightness levels. IC Role / Device Role / Timing Role: Coulomb counter with temperature-compensated NAC updates and self-discharge modeling. Use Value: Maintains runtime accuracy across ambient temperature shifts (0°C–50°C) and long idle periods between playback sessions. |
Use Scenario: Estimating remaining shot count and flash readiness during burst capture and LCD review. IC Role / Device Role / Timing Role: Reports average power (AP), at-rate time-to-empty (ARTTE), and available energy (SAE) via RAM registers. Use Value: Allows firmware to throttle image processing or disable preview based on real-time energy budget, not fixed battery percentage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery fuel gauging applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ27200DRKR | I²C interface instead of HDQ; identical DRK package, same core algorithm and EEPROM structure | Requires two I²C pins (SCL/SDA) and pull-ups; incompatible with HDQ-only host firmware | Select when host MCU lacks HDQ support but provides I²C and requires identical gas gauge functionality |
| BQ27425YZFT | Smaller 4-ball DSBGA package; integrated sense resistor option; enhanced aging model and higher-resolution coulomb counter (0.125 µVh) | Not pin-compatible; requires layout redesign; supports newer TI bqStudio configuration tools | Choose for space-constrained designs needing extended lifecycle tracking and modern toolchain integration |
Compared with BQ27000DRKR, BQ27200DRKR offers identical accuracy and feature set but mandates I²C infrastructure, while BQ27425YZFT delivers improved resolution and aging compensation in a smaller footprint - neither is pin-compatible, and both require firmware and layout updates.
Availability
BQ27000DRKR is available at Aetrix Electronics and suitable for PDA battery management, smartphone fuel gauging, MP3 player runtime monitoring, digital camera power tracking, and handheld device energy estimation requiring stable component supply and long-term industrial availability.
Supply support for BQ27000DRKR 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 expertise in battery management systems and precision analog IC design.
The BQ27000DRKR belongs to TI's bqJUNIOR™ series - a family of highly accurate, stand-alone single-cell Li-Ion/Li-Pol gas gauges designed specifically for space-constrained portable applications where minimal external components and zero user calibration are critical.
FAQ
What communication interface does the BQ27000DRKR use?
The BQ27000DRKR uses the HDQ one-wire serial interface, which requires only a single bidirectional pin (HDQ) and a pull-up resistor for host communication. This differs from the I²C-based BQ27200DRKR and eliminates clock/data line routing complexity. The BQ27000DRKR does not support I²C, and its timing parameters (e.g., t(HW0), t(DW1)) are defined exclusively for HDQ protocol compliance per SLUS556D.
Does the BQ27000DRKR require external calibration during production?
No, the BQ27000DRKR performs automatic internal offset calibration and requires no user calibration. Its delta-sigma coulomb counter includes auto-compensation for temperature, aging, and discharge rate. External PCB-induced offset can be measured using the CEO command and stored in EEPROM, but this is optional and performed only once during final test - the BQ27000DRKR ships fully functional without any calibration step.
What is the purpose of the PGM pin on the BQ27000DRKR?
The PGM pin on the BQ27000DRKR accepts 20–22 V programming voltage for writing to its internal EEPROM - used exclusively during manufacturing for configuring parameters like TCOMP, DMFSD, or EDV thresholds. It is not used during normal operation, must be left unconnected or protected from ESD in end equipment, and carries no functional role in runtime gas gauging or communication.
How does the BQ27000DRKR handle battery self-discharge compensation?
The BQ27000DRKR applies self-discharge compensation using an internal timer and temperature-dependent algorithm, reducing nominal available capacity (NAC) by 0.195% per 64 self-discharge estimate cycles. This value is derived from the battery's temperature and stored aging constants (TCOMP, DCOMP), and is applied automatically during sleep or ship mode - no host intervention is needed to maintain accuracy over storage periods.
Is the BQ27000DRKR suitable for new designs?
No - Texas Instruments explicitly marks the BQ27000DRKR as "Not Recommended For New Designs" in the SLUS556D datasheet. While fully functional and supported for legacy repair and continuity, new designs should consider newer alternatives such as the BQ27425 or BQ27510 families, which offer enhanced accuracy, smaller packages, and active TI design support and toolchain integration.
BQ27000DRKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- bqJUNIOR™
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Function:
- Battery Monitor
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 1
- Fault Protection:
- -
- Interface:
- I2C
- Operating Temperature:
- -20°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSON (3x4)
BQ27000DRKR FAQ
1.How can I place an order for BQ27000DRKR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ27000DRKR 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 BQ27000DRKR reliable?
The price and inventory of BQ27000DRKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ27000DRKR is usually 5 days.
3.What payment methods are accepted for BQ27000DRKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ27000DRKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ27000DRKR?
BQ27000DRKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ27000DRKR 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 BQ27000DRKR?
For technical support, including BQ27000DRKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ27000DRKR requirements.
6.How does Aetrix verify that BQ27000DRKR is sourced from the original manufacturer or authorized distributors?
All BQ27000DRKR 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 BQ27000DRKR meets industry standards.
7.What is the process for return or replacement of BQ27000DRKR?
All BQ27000DRKR units undergo pre-shipment inspection (PSI). If there is an issue with BQ27000DRKR, 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 BQ27000DRKR part is unused and in its original packaging.
Return procedure for BQ27000DRKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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