BQ34210IPWRQ1 - Automotive 1-Series CEDV Fuel Gauge | TI
部品番号: BQ34210-Q1 ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.36 | $336.00 |
| 500 | $2.94 | $1,470.00 |
| 1,000 | $2.65 | $2,650.00 |
BQ34210-Q1 概要
A battery fuel gauge is a mixed-signal IC that estimates remaining capacity and battery health by combining coulomb counting with voltage, current, and temperature measurements. Within the broader power-management hierarchy, the BQ34210-Q1 sits in the Battery Management category, complementing chargers and protection switches. Unlike impedance-tracking gauges that demand frequent load cycles to remain accurate, the CEDV algorithm is specifically tuned for batteries that sit at near-full charge for long periods, making it a specialized alternative to TI's bq27xxx Impedance Track family.
Key specifications include a 14-pin TSSOP (PW) footprint, I2C communication for host MCU access, support for 1-series cell chemistries (Li-Ion / LiFePO4 / NiMH), and an automotive-grade temperature range. The device draws minimal current during periodic wake cycles to update self-discharge compensation, maintaining accurate remaining capacity even after months of float-charge operation. End-of-Service detection flags batteries whose impedance or capacity degradation indicates imminent failure.
The BQ34210-Q1 features an integrated sense resistor interface, programmable alarm outputs for low-battery and EOS conditions, and compatibility with TI's Battery Management Studio (bqStudio) for parameter configuration. Its compact TSSOP-14 footprint minimizes PCB area in space-constrained modules such as telematics control units and emergency-call backup packs.
Typical applications include automotive eCall backup batteries, asset tracking device primary cells, UPS backup modules, medical device standby batteries, IoT sensor nodes, and emergency lighting battery packs. The EOS prediction function allows fleet operators to replace batteries proactively before they fail in service.
When designing with the BQ34210-Q1, ensure the sense resistor value is correctly programmed into the device's data flash to match the application load range. Account for I2C pull-up resistors on the host interface, and verify the thermistor beta and configuration match the chosen cell chemistry.
This page synthesizes distributor pricing, drop-in alternatives, application notes, and design guidance not aggregated on a single manufacturer page, including same-package options and practical integration tips.
ドロップイン代替品: BQ34210-Q1 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
BQ34210IPWRQ1
✅ ドロップイン📋 参考代替品（カタログ未掲載）
BQ34210IPWQ1
✅ ドロップイン📋 参考代替品（カタログ未掲載）
BQ34110IPWRQ1
✅ ドロップイン📋 参考代替品（カタログ未掲載）
BQ27Z561IPWR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
BQ34210-Q1 仕様
| Product Type | Battery Fuel Gauge (CEDV) |
| Cell Configuration | 1-Series Cell |
| Supported Chemistries | Li-Ion, LiFePO4, NiMH |
| Communication Interface | I2C |
| パッケージ | 14-pin TSSOP (PW) |
| 動作温度範囲 | -40C to +85C (automotive grade) |
| AEC-Q100 Qualification | Qualified (Q1 suffix) |
| Fuel Gauging Algorithm | CEDV (Compensated End-of-Discharge Voltage) |
| End-of-Service (EOS) Detection | Yes (integrated) |
| Self-Discharge Compensation | Yes (every 1/4 s awake; periodic in SLEEP) |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
| Sense Resistor | External (programmable in data flash) |
| Host Interface | I2C (standard / fast mode) |
| Configuration Tool | TI bqStudio |
BQ34210-Q1 ピン構成
| ピン 1 | VCC — Power supply input |
| ピン 2 | SRP — Sense resistor positive input |
| ピン 3 | SRN — Sense resistor negative input |
| ピン 4 | BAT — Battery voltage sense input |
| ピン 5 | GND — Ground |
| ピン 6 | TS — Thermistor input |
| ピン 7 | ALERT — Interrupt / alarm output (active-low) |
| ピン 8 | NC — Not connected (per datasheet) |
| ピン 9 | NC — Not connected (per datasheet) |
| ピン 10 | SDA — I2C data |
| ピン 11 | SCL — I2C clock |
| ピン 12 | NC — Not connected (per datasheet) |
| ピン 13 | NC — Not connected (per datasheet) |
| ピン 14 | GND — Ground (thermal pad / secondary) |
主な用途
BQ34210-Q1 の用途: 6 件s: Automotive eCall Backup Battery, Uninterruptible Power Supply (UPS) Backup, Asset Tracking and Fleet Telematics, Emergency Lighting Battery Packs, Medical Device Standby Batteries, IoT Sensor Node Primary Cells.
Automotive eCall Backup Battery
The BQ34210-Q1's CEDV algorithm is specifically designed for batteries that sit at near-full charge for long durations and discharge only during an emergency call event, with the integrated EOS detection flagging battery degradation well before the system must operate in the field. In a typical eCall module, the gauge monitors the 1S Li-Ion or LiFePO4 backup cell through an external sense resistor, reports SOC via I2C to the telematics MCU, and asserts an alert pin when SOC or SOH crosses the programmed threshold. Compared with Impedance Track gauges that would lose accuracy during months of float charge, the CEDV approach maintains reliable SOC reporting because it does not require periodic full discharge cycles for recalibration.
おすすめ
Uninterruptible Power Supply (UPS) Backup
UPS systems for routers, industrial controllers, and security panels rely on 1S Li-Ion or LiFePO4 backup cells that remain at near-full charge for years, then must deliver full capacity instantly during a mains failure. The BQ34210-Q1's CEDV fuel gauge tracks SOC accurately through long float-charge periods and uses self-discharge compensation every 1/4 second (when awake) and periodically in SLEEP to keep the displayed SOC consistent. With an integrated sense-resistor interface, alarm outputs for low-battery and EOS, and -40C to +85C operation, the gauge fits cold-start industrial cabinets and outdoor telecom enclosures where thermal margins are tight.
おすすめ
Asset Tracking and Fleet Telematics
Asset trackers and telematics units operating from a single Li-Ion or primary cell benefit from the BQ34210-Q1's compact 14-pin TSSOP footprint, low quiescent current, and accurate SOC reporting under the variable environmental conditions typical of vehicle-mounted or shipping-container applications. The gauge's I2C interface connects directly to the tracker MCU, providing SOC, SOH, and EOS information that allows the device to transmit a low-battery warning before the cell becomes too weak for cellular transmission. With AEC-Q100 qualification, the tracker remains reliable across the full automotive temperature range without requiring external thermal protection.
おすすめ
Emergency Lighting Battery Packs
Building-safety lighting systems depend on 1S NiMH or LiFePO4 battery packs that float at full charge for months and discharge only during a power failure, exactly the operating profile the BQ34210-Q1's CEDV algorithm is tuned for. The integrated EOS detection flags packs whose capacity has degraded to the point where they would not meet the mandated emergency-lighting duration, enabling scheduled proactive replacement rather than field failures. The 14-pin TSSOP package is small enough to fit inside emergency-lighting ballast enclosures, and the AEC-Q100 automotive grade handles the wide thermal range of ceiling-mounted luminaires.
おすすめ
Medical Device Standby Batteries
Medical infusion pumps, portable patient monitors, and AED defibrillators use 1S Li-Ion or LiFePO4 cells that must report accurate SOC and SOH data so that caregivers know whether the device has enough charge for a clinical session. The BQ34210-Q1 supports NiMH, Li-Ion, and LiFePO4 chemistries, allowing designers to choose the cell that best matches the medical device's safety, runtime, and shelf-life requirements. With the EOS function flagging battery degradation before the device becomes unsafe to use, the gauge helps medical OEMs comply with IEC 62133 and related battery-safety standards that require predictable end-of-life behavior.
おすすめ
IoT Sensor Node Primary Cells
Long-life IoT sensor nodes - particularly those powered by 1S primary Li-SOCl2 or rechargeable Li-Ion cells with rare discharge events - benefit from the BQ34210-Q1's CEDV algorithm and very low periodic wakeup current. The gauge's self-discharge compensation maintains accurate SOC reporting even when the node sleeps for weeks between transmissions, and the I2C interface draws minimal current during host MCU polling. The compact 14-pin footprint fits inside the smallest sensor enclosures, and the automotive temperature range is wide enough for outdoor industrial deployments in unheated enclosures.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: BQ34210-Q1 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | BQ34210IPWRQ1 | BQ34210IPWQ1 | BQ34110IPWRQ1 | BQ27Z561IPWR |
|---|---|---|---|---|---|
| Package | 14-TSSOP (PW) | 14-TSSOP (PW) - same | 14-TSSOP (PW) - same | 14-TSSOP (PW) - same | 14-TSSOP (PW) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Cell Configuration | 1-Series Cell | 1-Series | 1-Series | 1-4 Series (multi-cell) | 1-Series |
| Fuel Gauging Algorithm | CEDV | CEDV | CEDV | CEDV | Impedance Track |
| End-of-Service (EOS) Detection | Yes | Yes | Yes | Yes | No |
| AEC-Q100 Qualification | Yes (Q1) | Yes (Q1) | Yes (Q1) | Yes (Q1) | No |
| Supported Chemistries | Li-Ion / LiFePO4 / NiMH | Li-Ion / LiFePO4 / NiMH | Li-Ion / LiFePO4 / NiMH | Li-Ion / LiFePO4 / NiMH | Li-Ion / LiFePO4 |
| Host Interface | I2C | I2C | I2C | I2C | I2C |
主な差別化要因
- Rarely-discharged profile optimization （vs BQ27Z561IPWR (Impedance Track))
- Integrated End-of-Service (EOS) detection （vs BQ27Z561IPWR)
- Multi-chemistry support including NiMH （vs BQ27Z561IPWR)
設計ノート
The BQ34210-Q1 draws minimal current during periodic wake cycles (typically tens of microamps) and enters SLEEP between updates to conserve battery capacity. Provide a clean 2.5-3.0 V regulated supply to the VCC pin and decouple with a 0.1 uF ceramic capacitor placed within 3 mm of the VCC pin. Avoid placing the gauge on a high-impedance voltage rail, because supply noise couples into the coulomb-counting ADC and degrades SOC accuracy over time.
Route the SRP and SRN traces as a Kelvin connection directly to the sense resistor pads, keeping them short and symmetrical to minimize parasitic resistance that would corrupt current measurement. Place the thermistor input (TS) trace close to the cell for accurate temperature sensing, and route it away from switching power components. The ALERT pin requires a pull-up resistor (typically 10 kohm to VCC) for proper open-drain operation. Use a 4-layer stack-up with a dedicated ground plane to minimize I2C bus noise on the SDA and SCL lines.
Do not use the BQ34210-Q1 in applications that require frequent full discharge cycles without re-evaluating the CEDV coefficients - the CEDV algorithm is optimized for rarely-discharged profiles and may not be the best choice for daily-cycled packs (consider BQ27Z561 for those). Verify that the sense resistor value matches the programmed data-flash parameter; a mismatch causes cumulative SOC drift over weeks of operation. Always program the chemistry profile (Li-Ion vs LiFePO4 vs NiMH) before deploying the gauge to production, because the EOS thresholds are chemistry-specific. The I2C address is hardware-strapped and must be unique on the bus if multiple TI gauges coexist on the same host.
コンプライアンス情報
AEC-Q100 qualified (Q1 suffix). Lead-free, halogen-free. RoHS compliant per TI product page. Suitable for automotive safety applications.
