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Texas Instruments BQ2060SS-E411
- Part No.:
- BQ2060SS-E411
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 28-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
BQ2060SS-E411.pdf
- Description:
- IC GAS GAUGE MULTI 28SSOP/QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,937
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Product details
Overview
BQ2060SS-E411 from Texas Instruments is a SBS v1.1-compliant smart battery gas gauge IC for NiCd, NiMH, Li-ion, and lead-acid chemistries. It delivers 15-bit resolution voltage/temperature/current measurement, monitors up to four individual cell voltages, and drives 4- or 5-segment LED displays for remaining capacity indication in portable medical devices and industrial battery packs.
For engineers reviewing the BQ2060SS-E411 datasheet, BQ2060SS-E411 pinout, BQ2060SS-E411 application, or BQ2060SS-E411 equivalent, key selection considerations include SMBus v1.1/HDQ16 interface support, V-to-F converter with <16 µV calibrated offset, REG-controlled JFET-based VCC regulation, LED display control via DISP/LED1–LED5, and integrated charge/discharge FET control (CFC/DFC) for Li-ion protection circuits.
Technical Context
The BQ2060SS-E411 implements a dual-path measurement architecture: a voltage-to-frequency converter (VFC) with auto-offset calibration for high-accuracy charge/discharge counting, and a sigma-delta ADC for 15-bit voltage, temperature, and current sampling every 2–2.5 seconds. It supports both SMBus v1.1 (open-drain, 10–100 kHz) and 1-wire HDQ16 protocols for host communication.
Operation relies on external EEPROM configuration for chemistry-specific parameters (self-discharge rate, calibration coefficients, EDV thresholds), while real-time compensation applies temperature-dependent self-discharge scaling and midrange voltage corrections (VOC25/VOC50/VOC75) to RemainingCapacity() register updates. Control outputs CVON and THON enable time-gated cell voltage and thermistor bias connections to minimize standby current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Resolution | 15-bit ADC enables ±1 mV precision on VCELL1–VCELL4 inputs (0–1.25 V range) |
| Current Sensing Offset | Calibrated VSR offset ≤ ±16 µV ensures <0.5% error in low-current discharge tracking |
| Operating Current | 235 µA typical at 3.3 V enables multi-year runtime in battery-backed systems |
| Self-Discharge Compensation | Temperature-scaled algorithm adjusts RemainingCapacity() in 0.39% increments per update cycle |
| Cell Monitoring | Four dedicated VCELL inputs support series-connected Li-ion packs up to 20 V total (via external dividers) |
| Interface Protocols | SMBus v1.1 (PEC-capable) and Benchmarq HDQ16 provide dual-host compatibility without protocol translation |
| LED Drive Capability | Five open-drain LED outputs (LED1–LED5) drive standard 20 mA segments directly |
Pinout & Package
28-pin 150-mil SSOP package with exposed thermal pad (not electrically connected). Pin functions validated per TI SLUS035E Rev. October 2005 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| HDQ16 | 1-Wire bidirectional I/O | Single-pin host interface supporting break detection and command framing per HDQ16 protocol |
| ESCL/ESDA | EEPROM clock/data | Dedicated 2-wire bus to external configuration EEPROM; isolated from SMBus/HDQ paths |
| REG | JFET gate control output | Drives external n-JFET to regulate VCC from battery stack; 3.3 V ±0.3 V nominal output |
| VOUT | EEPROM supply output | Provides regulated 3.3 V to external EEPROM; 5 mA source capability |
| DFC/CFC | Discharge/Charge FET control | Open-drain outputs directly interface with pack-level N-channel MOSFETs for overcurrent protection |
| CVON/THON | Cell/thermistor bias gating | Active-high signals enable voltage divider networks only during measurement cycles to reduce quiescent current |
| VCELL1–VCELL4 | Individual cell voltage inputs | Differential inputs accepting 0–1.25 V; require external precision resistor dividers per TI Table 1 |
| SR1/SR2 | Current sense differential inputs | Accept bipolar ±250 mV across sense resistor; VFC input path with <16 µV offset correction |
Key Features
| Feature | Design Value |
|---|---|
| Smart Battery Specification v1.1 compliance | Full register map implementation (RemainingCapacity, FullChargeCapacity, Temperature, Voltage, etc.) enables plug-and-play integration into SBS-compliant hosts |
| Auto-calibrating V-to-F converter | Initiated via ManufacturerAccess() command; achieves <1 µV residual offset after cancellation for long-term coulomb counting accuracy |
| Programmable end-of-discharge thresholds | EDV0/EDV1/EDV2 configurable in EEPROM; enable voltage-based RM corrections at 0%, 3%, and user-defined BatteryLow% levels |
| Midrange voltage correction | VOC25/VOC50/VOC75 thresholds trigger RM adjustments to 25%/50%/75% when open-circuit voltage matches programmed values under stable conditions |
| Thermistor-based temperature compensation | Uses Semitec 103AT NTC thermistor; THON-gated biasing enables accurate thermal profiling without continuous power draw |
Applications
| Medical Portable Defibrillators | Industrial Handheld Testers |
|---|---|
Use Scenario: Battery-powered defibrillator requiring precise remaining runtime estimation during emergency standby and repeated high-current discharge pulses. IC Role / Device Role / Timing Role: Gas gauge IC performing real-time coulomb counting, self-discharge compensation, and EDV-triggered capacity correction to maintain ±3% SoC accuracy across temperature and aging. Use Value: Enables reliable "low-battery" warnings before critical energy depletion, preventing device shutdown during life-saving operation. | Use Scenario: Rugged handheld multimeter operating on rechargeable NiMH packs in field environments with wide temperature swings. IC Role / Device Role / Timing Role: Primary battery management unit monitoring individual cell voltages, compensating for temperature-dependent self-discharge, and driving LED capacity indicators. Use Value: Extends usable battery life by 18% through adaptive midrange voltage corrections (VOC50/VOC75) that counteract voltage hysteresis in NiMH cells. |
| Lithium-ion Power Tools | Emergency Lighting Systems |
Use Scenario: Cordless drill/driver with 18 V Li-ion pack requiring robust overcurrent protection and accurate state-of-charge reporting under high-pulse loads. IC Role / Device Role / Timing Role: Integrated protection controller using CFC/DFC outputs to manage external charge/discharge FETs, while VCELL monitoring prevents cell imbalance. Use Value: Prevents premature cutoff during torque-intensive operation by applying dynamic EDV compensation based on real-time current and temperature. | Use Scenario: UL924-compliant emergency exit sign with sealed lead-acid backup battery requiring decades-long reliability and low-quiescent monitoring. IC Role / Device Role / Timing Role: Low-power gas gauge maintaining capacity records during 10+ year deployments using ISLP = 10 µA storage mode and RBI-supplied register retention. Use Value: Eliminates manual battery replacement scheduling by predicting end-of-life via FCC learning across partial discharge cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar smart battery gas gauge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ2084DBTR | Integrated 12-bit ADC + 16-bit VFC; supports SMBus v2.0; includes internal EEPROM; no HDQ16 interface | Eliminates external EEPROM but requires SMBus-only host; lacks 1-wire option for legacy systems | Select for new designs prioritizing reduced BOM count and SMBus v2.0 features over HDQ16 compatibility |
| MAX11617ETL+ | Standalone 16-bit SAR ADC; no gas gauge firmware, VFC, or SMBus stack; requires external microcontroller | Demands full custom firmware development for coulomb counting and SBS register emulation | Select only when maximum analog measurement flexibility is required and system MCU can host full gas gauge algorithm |
Compared with BQ2060SS-E411, BQ2084DBTR reduces component count via integrated memory but sacrifices HDQ16 support, while MAX11617ETL+ offers higher ADC resolution yet requires complete firmware implementation-neither provides the same balance of SBS compliance, dual-interface support, and embedded gas gauge logic.
Availability
BQ2060SS-E411 is available at Aetrix Electronics and suitable for medical portable defibrillators, industrial handheld testers, lithium-ion power tools, and emergency lighting systems requiring stable component supply across extended product lifecycles.
Supply support for BQ2060SS-E411 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 leadership in precision analog ICs.
The BQ2060SS-E411 belongs to TI's Smart Battery Fuel Gauge product line, designed specifically for SBS v1.1-compliant battery packs requiring high-accuracy coulomb counting, multi-chemistry support, and integrated LED display control in portable and industrial applications.
FAQ
What battery chemistries does the BQ2060SS-E411 support?
The BQ2060SS-E411 supports NiCd, NiMH, Li-ion, and lead-acid battery chemistries. Its EEPROM-programmable parameters-including self-discharge rate, rate compensation factors, and voltage thresholds-allow precise adaptation to each chemistry's unique aging and discharge characteristics. The BQ2060SS-E411 uses these stored values to adjust RemainingCapacity() calculations dynamically during use and standby.
How does the BQ2060SS-E411 achieve <16 µV offset accuracy in charge/discharge measurement?
The BQ2060SS-E411 employs an auto-calibration routine triggered by the ManufacturerAccess() command, which cancels VSR input offset down to <1 µV residual error. This process corrects for PCB layout mismatches and amplifier drift, ensuring the V-to-F converter maintains ≤0.5% error in low-current tracking. The BQ2060SS-E411 stores calibrated offset values in internal registers for continuous application during coulomb counting.
Can the BQ2060SS-E411 drive LEDs directly without external transistors?
Yes, the BQ2060SS-E411 provides five open-drain LED driver outputs (LED1–LED5) capable of sinking 5 mA per segment at 0.4 V drop. These outputs directly drive standard 20 mA LEDs when used with appropriate current-limiting resistors. The DISP input controls LED refresh timing, and the BQ2060SS-E411 internally sequences segment activation to support 4- or 5-segment capacity displays without external multiplexing circuitry.
What is the role of the CVON and THON pins on the BQ2060SS-E411?
CVON and THON are active-high control outputs that gate external FETs to connect voltage dividers (for VCELL1–VCELL4) and thermistor bias networks (for TS) only during measurement periods. CVON enables cell voltage sampling for 250 ms per cycle (12.5% duty), while THON activates thermistor bias for 60 ms per reading. This gating reduces average current consumption by >90% compared to continuous biasing, extending battery life in always-on monitoring applications. The BQ2060SS-E411 manages timing autonomously.
Does the BQ2060SS-E411 require an external EEPROM, and what data does it store?
Yes, the BQ2060SS-E411 requires an external EEPROM connected via ESCL/ESDA pins. This EEPROM stores critical configuration data including battery chemistry type, design capacity/voltage, self-discharge rate at 25°C, EDV thresholds (EDV0/EDV1/EDV2), VOC midrange correction points, and calibration coefficients for voltage/current/temperature channels. The BQ2060SS-E411 reads this data at power-up and uses it to initialize its gas gauge algorithms-without properly programmed EEPROM, the BQ2060SS-E411 cannot perform accurate capacity estimation.
BQ2060SS-E411 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Battery Monitor
- Battery Chemistry:
- Multi-Chemistry
- 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
BQ2060SS-E411 FAQ
1.How can I place an order for BQ2060SS-E411 through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ2060SS-E411 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 BQ2060SS-E411 reliable?
The price and inventory of BQ2060SS-E411 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ2060SS-E411 is usually 5 days.
3.What payment methods are accepted for BQ2060SS-E411?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ2060SS-E411 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ2060SS-E411?
BQ2060SS-E411 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ2060SS-E411 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 BQ2060SS-E411?
For technical support, including BQ2060SS-E411 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ2060SS-E411 requirements.
6.How does Aetrix verify that BQ2060SS-E411 is sourced from the original manufacturer or authorized distributors?
All BQ2060SS-E411 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 BQ2060SS-E411 meets industry standards.
7.What is the process for return or replacement of BQ2060SS-E411?
All BQ2060SS-E411 units undergo pre-shipment inspection (PSI). If there is an issue with BQ2060SS-E411, 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 BQ2060SS-E411 part is unused and in its original packaging.
Return procedure for BQ2060SS-E411:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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