BQ76952PFBR - 3S-16S High-Accuracy Battery Monitor | TI
部品番号: BQ76952PFBR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $3.5 | $3.50 |
| 10 | $3.15 | $31.50 |
| 100 | $2.95 | $295.00 |
| 500 | $2.8 | $1,400.00 |
| 1,000 | $2.67 | $2,670.00 |
BQ76952PFBR 概要
A battery monitor and protector is a power-management IC at the core of a battery management system (BMS), sitting between the multi-cell stack and the system host. It measures each series cell's voltage and pack current, enforces safe operating limits through hardware protections, and communicates status to a microcontroller over I2C, SPI, or HDQ. In the system hierarchy, it belongs to battery management ICs within power management semiconductors.
Key features include support for 3 to 16 series cells with high measurement accuracy, protection of overvoltage, undervoltage, overcurrent, short circuit, and overtemperature conditions, integrated cell balancing FETs, and dual programmable LDOs that supply external system circuitry. High-side driver architecture keeps the pack negative terminal at ground, simplifying system grounding.
Technically, the device provides 16 cell-voltage input channels and a stack operating range up to 80 V, with a host communication peripheral supporting 400-kHz I2C, SPI, and HDQ one-wire standards, allowing designers to match the interface to the host MCU. Hardware protections operate autonomously even if the host is absent, meeting functional-safety-oriented design patterns for lithium battery packs.
Typical applications include 48 V server and telecom backup batteries, e-bike and light electric vehicle packs, portable power stations, and industrial energy storage modules where 10S to 16S Li-ion or LiFePO4 chemistries are common.
A key design consideration is the VC0X/VC10X filter-capacitor connections: follow TI's recommended RC input filtering to preserve accuracy under switching-load transients, and verify REG1/REG2 loading budget against external system loads.
This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not consolidated in the manufacturer datasheet.
ドロップイン代替品: BQ76952PFBR — 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。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: BQ76952PFBR （同一形状・フットプリント） — 相違点: Cell Balancing, Package, Operating Temperature, FET Drivers.
クイック比較ツール — 並列比較する代替部品を選択:
BQ76942PFBR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
BQ769142PFBR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
BQ7695202PFBR
✅ ドロップイン✓ 在庫あり
$4.35 / 個
データシートを見る →BQ76952PFBR 仕様
| Cell Count | 3-series to 16-series |
| Supported Chemistries | Li-Ion, Li-Polymer, LiFePO4 |
| Stack / Input Voltage Range | 4.7 V to 80 V |
| Cell Voltage Input Channels | 16 |
| Communication Interfaces | I2C (400 kHz), SPI, HDQ one-wire |
| FET Drivers | Integrated high-side charge-pump NFET drivers (CHG/DSG) |
| Protections | Cell OV/UV, pack overcurrent, short circuit, overtemperature |
| Cell Balancing | Integrated balancing FETs |
| Auxiliary Supplies | Dual programmable LDOs (REG1, REG2) |
| Current Sensing | SRP/SRN sense-resistor inputs (coulomb counter support) |
| 動作温度 | -40C to +85C (industrial) |
| パッケージ | 48-TQFP (7x7 mm), PFBR |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
BQ76952PFBR 48-tqfp (7x7 mm), pfbr ピン配置ガイド
BQ76952PFBR (48-tqfp (7x7 mm), pfbr パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: BQ76952PFBR.
詳細は データシート をご参照ください。
主な用途
BQ76952PFBR の用途: 6 件s: 48V Server and Telecom Backup Batteries, E-Bike and Light Electric Vehicle Packs, Portable Power Stations, Industrial Energy Storage Modules, Battery Test and Cycling Equipment, UPS and Inverter Battery Systems.
48V Server and Telecom Backup Batteries
The BQ76952PFBR fits 48 V backup battery packs used in data centers and telecom base stations, which are typically 13S to 16S Li-ion. Its 4.7 V to 80 V stack range comfortably covers a 16S pack at roughly 58-67 V peak, and 16 cell-voltage inputs monitor every series cell. Hardware OV/UV/OC/short-circuit protections operate autonomously, which matters in unattended infrastructure where the host may be offline during a fault. The SRP/SRN sense inputs support coulomb counting for state-of-charge reporting to site controllers, and the dual programmable LDOs (REG1/REG2) can power auxiliary monitoring circuitry. The 400-kHz I2C or SPI link integrates cleanly with the pack-level MCU across the isolation boundary.
おすすめ
E-Bike and Light Electric Vehicle Packs
Light EV packs in the 36-48 V class commonly use 10S to 13S Li-ion cells, squarely inside the BQ76952PFBR's 3S-16S window. Its integrated high-side charge-pump NFET drivers (CHG/DSG) keep the pack negative at chassis ground, simplifying grounding in vehicles, and autonomous short-circuit and overcurrent protection responds faster than any software loop during connector faults. Integrated cell balancing FETs correct capacity divergence from partial charging cycles typical of commuter use. HDQ one-wire mode minimizes the number of signals crossing into the display/BMS controller, reducing harness complexity. The industrial -40C to +85C range covers outdoor riding conditions, and the same footprint accepts BQ76942PFBR for 10S product variants.
おすすめ
Portable Power Stations
Portable power stations typically stack 12S-16S Li-ion or LiFePO4 cells to deliver 500 Wh to 2 kWh, and the BQ76952PFBR covers this range natively including LiFePO4 chemistry profiles. The 80 V maximum stack rating provides headroom for 16S LiFePO4 at about 58 V plus transient margin. Autonomous hardware protections guard against user-induced faults such as sustained output shorts, while the host MCU reads per-cell voltages and coulomb-counter data over I2C to feed the fuel gauge shown on the LCD. Dual programmable LDOs can bias the display standby rail or isolation components. The 7x7 mm TQFP fits the compact inverter/battery boards typical of this product category.
おすすめ
Industrial Energy Storage Modules
Modular industrial ESS racks use 15S-16S LiFePO4 modules in series-stacked strings, and the BQ76952PFBR provides per-cell monitoring with high accuracy inside each module while the string-level controller aggregates data over isolated communication links. Autonomous cell OV/UV protection isolates a faulted module locally, improving rack availability, and the high-side driver architecture allows module-level disconnect without referencing the rack ground. The SRP/SRN sense-resistor front end supports pack current integration for state-of-health trending across thousands of cycles. Its industrial temperature rating and standard 48-TQFP assembly flow align with typical industrial manufacturing and qualification processes for stationary storage hardware.
おすすめ
Battery Test and Cycling Equipment
Battery formation and cycling benches benefit from the BQ76952PFBR's 16-channel cell monitoring as a compact per-channel measurement front end for 10S-16S fixtures. The SPI interface supports fast register polling during high-rate cycling sequences where every millisecond of protection response must be logged, while I2C suits slower characterization sweeps. Its hardware protections provide a second, independent safety layer beside the bench's own cutoff logic, protecting cells from tester malfunction. The device's documented register map and TI host documentation reduce firmware development time for test-engineering teams. Using the same monitor IC in both test fixtures and the final product also improves measurement correlation across the development cycle.
おすすめ
UPS and Inverter Battery Systems
Online UPS systems and hybrid inverters increasingly use 48 V lithium packs instead of VRLA strings, and the BQ76952PFBR provides the pack-side monitoring and protection for these 13S-16S stacks. The 400-kHz I2C or SPI link feeds per-cell and pack data to the inverter's CAN/Modbus gateway, enabling state-of-charge-aware charging curves and early end-of-life warnings. Autonomous undervoltage protection disconnects the load before deep-discharge damage during extended outages, and high-side driver architecture prevents ground-loop issues between the battery and inverter power stages. Dual LDOs can supply the isolation couplers that bridge the stack-referenced BQ76952 domain to the inverter controller.
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: BQ76952PFBR — 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 | BQ76942PFBR | BQ769142PFBR | BQ7695202PFBR |
|---|---|---|---|---|
| Package | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Host Interfaces | I2C 400 kHz / SPI / HDQ | I2C / SPI / HDQ | I2C / SPI / HDQ | I2C / SPI / HDQ |
| High-Side FET Drivers | Yes (CHG/DSG charge-pump) | Yes | Yes | Yes |
| Dual Programmable LDOs | Yes (REG1/REG2) | Yes | Yes | Yes |
主な差別化要因
- Maximum 16-series cell support （vs BQ76942PFBR)
- Fully integrated high-side power path （vs BQ769142PFBR)
- Drop-in family scalability （vs BQ7695202PFBR)
設計ノート
Follow TI's recommended RC input filtering on the VC0-VC15 cell taps: series resistors with filter capacitors to the shared capacitor nodes (CAP1/CAP2/CAP3) and the VC0X/VC10X connections suppress transients from switching loads and FET commutation. Keep the cell-tap routing away from the CHG/DSG high-current traces to prevent measurement offsets, and place the SRP/SRN Kelvin sense traces directly at the sense-resistor pads for accurate coulomb counting.
Budget the REG1 and REG2 programmable LDO outputs before assigning loads: they are intended for isolated-communication circuitry and low-power peripherals, not heavy loads. Estimate total auxiliary draw against the datasheet LDO current limits and the stack-referenced power budget - overloading REG1 can drop the interface supply and interrupt host communication during protection events. Prefer powering the host MCU from the pack-side LDO only when its sleep current is within the pack's allowable standby drain.
A common pitfall is treating the BQ76952 and BQ76942 as firmware-identical: while they share the same 48-TQFP footprint and pinout, the BQ76942 is limited to 10S and register/behavior details should be revalidated per TI documentation before swapping parts on an existing PCB. Also confirm default configuration of variant parts such as BQ7695202 against your host firmware - variant-level differences are not always obvious from the part number alone.
コンプライアンス情報
RoHS compliant per distributor listings. Not stated as AEC-Q100 qualified; targets industrial applications (-40C to +85C). Consult TI product literature for REACH and conflict-minerals declarations.
