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Texas Instruments BQ2060SS-E411TR
- Part No.:
- BQ2060SS-E411TR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 28-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
BQ2060SS-E411TR.pdf
- Description:
- IC GAS GAUGE MULTI 28SSOP/QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,080
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Product details
Overview
BQ2060SS-E411TR from Texas Instruments is a SBS v1.1-compliant gas gauge IC for NiCd, NiMH, Li-ion, and lead-acid battery packs. It delivers 15-bit resolution voltage/temperature/current measurement, <16 µV V-to-F converter offset, LED-based capacity display (4–5 segments), and SMBus/HDQ16 interface - deployed in smart battery packs for portable medical devices, industrial handhelds, and UPS systems.
For engineers reviewing the BQ2060SS-E411TR datasheet, BQ2060SS-E411TR pinout, BQ2060SS-E411TR application, or BQ2060SS-E411TR equivalent, key selection criteria include its dual-protocol support (SMBus v1.1 with PEC or 1-wire HDQ16), integrated cell-voltage monitoring (VCELL1–VCELL4), programmable self-discharge compensation across –20°C to +70°C, and LED driver outputs (LED1–LED5) with DISP-controlled blanking.
Technical Context
The BQ2060SS-E411TR implements a sigma-delta ADC for voltage, temperature, and current sensing, plus a fully differential, dynamically balanced voltage-to-frequency converter (VFC) for charge/discharge counting. Its VFC achieves auto-calibrated offset correction down to ±16 µV and supports bipolar input range ±250 mV on SR1/SR2.
It interfaces via two independent physical layers: open-drain SMBus (SMBC/SMBD, 10–100 kHz) and Benchmarq HDQ16 (1-wire, break-based timing). Control logic includes dedicated FET drivers (CFC/DFC), thermistor bias control (THON), cell voltage divider switching (CVON), and register backup via RBI input - all synchronized to an internal 2–2.5 s measurement cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Resolution | 15-bit ADC; enables ±1 mV precision on Voltage() register for accurate EDV threshold detection. |
| Current Sensing Offset | <16 µV calibrated offset; ensures sub-1 mA error in 0.02 Ω sense resistor applications (±12.5 A full-scale). |
| Operating Temp Range | –20°C to +70°C; validated for commercial battery pack environments without derating. |
| SMBus Frequency | 10–100 kHz; supports robust communication in noisy embedded systems with clock stretch up to 25 ms. |
| LED Drive Capability | LED1–LED5 sink outputs; each drives standard 20 mA LEDs directly with DISP-gated blanking control. |
| Cell Monitoring | VCELL1–VCELL4 inputs; accepts up to 1.25 V referenced to VSS, enabling 4-cell Li-ion stack monitoring via external resistive dividers. |
| Self-Discharge Compensation | Programmable rate at 25°C with ±10°C thermal scaling; adjusts RemainingCapacity() in 0.39% increments for stable long-term SoC hold. |
Pinout & Package
28-pin 150-mil SSOP package (JEDEC MO-153AC), surface-mount, gull-wing leads. Thermal pad not present. RoHS-compliant finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| HDQ16 | 1-wire bidirectional data I/O | Open-drain interface for HDQ16 protocol; requires external pull-up; supports break-initiated command framing. |
| ESCL / ESDA | EEPROM serial clock/data | Dedicated 2-wire bus to external configuration EEPROM; isolates calibration data from main SMBus traffic. |
| RBI | Register backup supply input | Accepts capacitor or auxiliary battery to retain critical registers during VCC brownout (1.3 V min retention). |
| REG | JFET gate drive output | Controls external n-JFET to regulate VCC from battery stack; 3.1–3.6 V regulated output in normal mode. |
| VOUT | EEPROM power supply | Provides regulated 3.3 V to external EEPROM; 5 mA source capability ensures reliable write cycles. |
| DISP | LED display enable input | Active-high logic input that gates LED1–LED5 outputs; enables display blanking during sleep or fault conditions. |
| LED1–LED5 | LED segment drivers | Open-drain sink outputs; each drives one LED segment in 4- or 5-segment bar graph indicating 20%/25% capacity steps. |
| DFC / CFC | Discharge/Charge FET control | Active-low outputs for Li-ion protection circuitry; drive external MOSFET gates to interrupt charge/discharge paths. |
| CVON / THON | Cell voltage/thermistor switch control | High-impedance pulsed outputs (12.5% duty cycle) that connect dividers/thermistors only during measurement - minimizing standby current. |
| TS / SRC / SR1–SR2 | Temperature/current sense inputs | High-impedance analog inputs (5–10 MΩ); TS accepts NTC thermistor; SRC measures series resistor voltage; SR1/SR2 feed VFC for charge integration. |
| VCELL1–VCELL4 | Individual cell voltage inputs | 0–1.25 V input range; supports up to 4-series Li-ion cells via external precision dividers (VCELL1/VCELL2 = half ratio of VCELL3/VCELL4). |
| SMBC / SMBD | SMBus clock/data | Open-drain bidirectional lines compliant with SMBus v1.1; support PEC for packet error checking. |
Key Features
| Feature | Design Value |
|---|---|
| SBS v1.1 Compliance | Fully implements Smart Battery System Data Specification v1.1 commands including RemainingCapacity(), FullChargeCapacity(), and Temperature() - enabling plug-and-play integration with host chargers and OS power managers. |
| V-to-F Charge Integration | Uses auto-calibrating voltage-to-frequency converter with <16 µV offset to accumulate charge/discharge flow - eliminating drift errors common in integrator-based gauges over time and temperature. |
| Multi-Chemistry Support | Configurable via EEPROM for NiCd, NiMH, Li-ion, and lead-acid chemistries - including programmable self-discharge rate, rate compensation, and voltage-based capacity correction thresholds (EDV0–EDV2, VOC25–VOC75). |
| Cell-Level Safety Monitoring | Direct VCELL1–VCELL4 inputs enable per-cell voltage tracking; combined with CVON-controlled sampling and DFC/CFC outputs, supports safe Li-ion pack supervision without external supervisor IC. |
| Low-Power Operation | 5–10 µA storage mode current and 180–235 µA active current - extends battery shelf life and minimizes gauge-induced drain in always-on battery packs. |
Applications
| Medical Portable Defibrillators | Industrial Handheld Scanners |
|---|---|
Use Scenario: Real-time battery capacity tracking during emergency use where display accuracy and low-temperature operation are critical. IC Role / Device Role / Timing Role: Gas gauge IC performing voltage/current/temperature acquisition every 2–2.5 s, updating RemainingCapacity() register, and driving 5-segment LED display via LED1–LED5. Use Value: Enables precise "time-to-empty" prediction under high-current pulse loads (defibrillation), validated from –20°C to +70°C with <16 µV offset stability. | Use Scenario: Ruggedized barcode scanner requiring battery state reporting to host MCU over SMBus while maintaining multi-year shelf life. IC Role / Device Role / Timing Role: Smart battery manager executing self-discharge compensation (0.39% RM decrements), EEPROM-backed configuration, and SMBus broadcast of ChargingVoltage()/ChargingCurrent() to host charger. Use Value: Eliminates need for external microcontroller in battery pack; reduces BOM cost by integrating LED drivers, FET controls, and cell monitoring in single 28-pin SSOP. |
| Uninterruptible Power Supplies (UPS) | Laptop Battery Packs |
Use Scenario: Lead-acid battery monitoring in small-format UPS units with requirement for runtime estimation and low-voltage cutoff. IC Role / Device Role / Timing Role: Multi-chemistry gas gauge acquiring VCELL1–VCELL4 (for stacked cells), measuring temperature via TS/THON, and triggering DFC-driven shutdown at EDV2 threshold. Use Value: Supports configurable EDV thresholds and midrange corrections (VOC25/VOC50/VOC75) to maintain ±3% SoC accuracy across aging and temperature gradients. | Use Scenario: Embedded Li-ion fuel gauge in OEM laptop battery packs requiring SBS v1.1 compliance and Windows ACPI battery reporting. IC Role / Device Role / Timing Role: SBS-compliant IC providing RemainingCapacity(), RelativeStateOfCharge(), and RunTimeToEmpty() via SMBus to system BIOS, while managing CFC/DFC FETs for overvoltage/overcurrent protection. Use Value: Delivers certified SBS v1.1 data structure compatibility, enabling seamless Windows battery status reporting without custom driver development. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar gas gauge IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ2060A | Same die, different trim; BQ2060A has tighter initial offset spec (±50 µV vs ±250 µV uncalibrated), but BQ2060SS-E411TR achieves <16 µV post-calibration. | BQ2060A targets higher-accuracy factory-calibrated modules; BQ2060SS-E411TR suits field-deployed packs with auto-calibration enabled. | Select BQ2060SS-E411TR when EEPROM-based learning and in-system offset correction are required for long-term accuracy. |
| BQ2083 | Successor device with integrated 10-bit ADC, enhanced SMBus v2.0 support, and built-in EEPROM - eliminates external memory dependency. | BQ2083 targets new designs seeking reduced component count; BQ2060SS-E411TR maintains legacy compatibility with existing EEPROM-based firmware and layout. | Choose BQ2060SS-E411TR for drop-in replacement in fielded BQ2060-based packs where EEPROM mapping and register addressing must remain unchanged. |
Compared with BQ2060A and BQ2083, the BQ2060SS-E411TR uniquely balances legacy SMBus v1.1/HDQ16 interoperability, external EEPROM flexibility for field updates, and proven auto-calibration performance - making it optimal for sustaining production of certified smart battery packs.
Availability
BQ2060SS-E411TR is available at Aetrix Electronics and suitable for medical portable defibrillators, industrial handheld scanners, and uninterruptible power supplies requiring stable component supply, long-lifecycle support, and SBS v1.1 certification.
Supply support for BQ2060SS-E411TR 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 over 50 years of innovation in precision analog ICs.
The BQ2060SS-E411TR belongs to TI's Smart Battery Fuel Gauge product line, designed specifically for accurate, low-power, multi-chemistry battery state-of-charge estimation in portable and industrial battery packs.
FAQ
What communication protocols does the BQ2060SS-E411TR support?
The BQ2060SS-E411TR supports both SMBus v1.1 (via SMBC/SMBD pins) with PEC capability and the 1-wire HDQ16 protocol (via HDQ16 pin). It does not support I²C or UART natively. SMBus operates at 10–100 kHz with clock stretching up to 25 ms; HDQ16 uses break-based timing with host-to-device and device-to-host cycles defined in TI's SLUS035E datasheet. Both protocols access identical register maps including RemainingCapacity() and Voltage().
How does the BQ2060SS-E411TR achieve accurate charge/discharge counting?
The BQ2060SS-E411TR uses a fully differential, dynamically balanced voltage-to-frequency converter (VFC) connected to SR1/SR2 pins. It measures bipolar voltage across a sense resistor (±250 mV range), integrates charge flow over time, and applies auto-calibration to reduce offset to <16 µV. The VFC fundamental rate is 6.25 µVh, and offset correction resolution is <1 µV. Calibration is triggered via ManufacturerAccess() command and occurs without interrupting normal operation.
Can the BQ2060SS-E411TR monitor individual cell voltages in a Li-ion pack?
Yes, the BQ2060SS-E411TR monitors up to four series-connected Li-ion cells via dedicated VCELL1–VCELL4 analog inputs. Each input accepts 0–1.25 V referenced to VSS. External precision resistive dividers are required, with VCELL1/VCELL2 using half the division ratio of VCELL3/VCELL4. The CVON pin controls FET switching to connect dividers only during measurement, reducing standby current. Measured values are stored in optional Manufacturer Function area registers (0x3c–0x3f).
What is the role of the RBI pin on the BQ2060SS-E411TR?
The RBI (Register Backup Input) pin on the BQ2060SS-E411TR provides backup power to retain critical registers during VCC brownout or shutdown. It accepts either a storage capacitor or auxiliary battery source, with minimum retention voltage of 1.3 V and maximum input current of 50 nA when VCC < 2.0 V. This ensures RemainingCapacity(), FullChargeCapacity(), and configuration data remain intact during brief power interruptions - essential for accurate SoC hold in intermittently powered battery packs.
Does the BQ2060SS-E411TR support self-discharge compensation, and how is it configured?
Yes, the BQ2060SS-E411TR supports programmable self-discharge compensation stored in external EEPROM (address 0x4a–0x4b). It estimates self-discharge rate at 25°C and scales it exponentially with temperature (doubling per +10°C, halving per –10°C). Compensation is applied as fixed 0.39% decrements to RemainingCapacity(), timed to achieve the programmed daily rate - e.g., 2.5%/day at 25°C becomes 5%/day at 35°C. The algorithm halts during charging and resets on full-charge detection.
BQ2060SS-E411TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-E411TR FAQ
1.How can I place an order for BQ2060SS-E411TR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ2060SS-E411TR 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-E411TR reliable?
The price and inventory of BQ2060SS-E411TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ2060SS-E411TR is usually 5 days.
3.What payment methods are accepted for BQ2060SS-E411TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ2060SS-E411TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ2060SS-E411TR?
BQ2060SS-E411TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ2060SS-E411TR 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-E411TR?
For technical support, including BQ2060SS-E411TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ2060SS-E411TR requirements.
6.How does Aetrix verify that BQ2060SS-E411TR is sourced from the original manufacturer or authorized distributors?
All BQ2060SS-E411TR 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-E411TR meets industry standards.
7.What is the process for return or replacement of BQ2060SS-E411TR?
All BQ2060SS-E411TR units undergo pre-shipment inspection (PSI). If there is an issue with BQ2060SS-E411TR, 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-E411TR part is unused and in its original packaging.
Return procedure for BQ2060SS-E411TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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