產品詳細資料

Rating Catalog Number of series cells (max) 15 Number of series cells (min) 9 Features Digital output, LDO output, Low-side driver, Overcurrent in discharging protection, Short-current detection Vin (max) (V) 75 Communication interface I2C Device type Cell monitor and balancer Operating temperature range (°C) -40 to 85 Battery overvoltage protection (min) (V) 3.15 Battery overvoltage protection (max) (V) 4.7 Operating current (typ) (µA) 40
Rating Catalog Number of series cells (max) 15 Number of series cells (min) 9 Features Digital output, LDO output, Low-side driver, Overcurrent in discharging protection, Short-current detection Vin (max) (V) 75 Communication interface I2C Device type Cell monitor and balancer Operating temperature range (°C) -40 to 85 Battery overvoltage protection (min) (V) 3.15 Battery overvoltage protection (max) (V) 4.7 Operating current (typ) (µA) 40
TSSOP (DBT) 44 71.36 mm² (11.15 mm × 6.4 mm)
  • AFE monitoring features
    • Pure digital interface
    • Internal ADC measures cell voltage, die temperature, and external thermistor
    • A separate, internal ADC measures pack current (coulomb counter)
    • Directly supports up to three thermistors (103AT)
  • Hardware protection features
    • Overcurrent in Discharge (OCD)
    • Short Circuit in Discharge (SCD)
    • Overvoltage (OV)
    • Undervoltage (UV)
    • Secondary protector fault detection
  • Additional features
    • Integrated cell balancing FETs
    • Charge, discharge low-side NCH FET drivers
    • Alert interrupt to host microcontroller
    • 2.5-V or 3.3-V output voltage regulator
    • No EEPROM programming necessary
    • High supply voltage absolute maximum (up to 108 V)
    • Simple I2C compatible interface (CRC option)
    • Random cell connection tolerant
  • AFE monitoring features
    • Pure digital interface
    • Internal ADC measures cell voltage, die temperature, and external thermistor
    • A separate, internal ADC measures pack current (coulomb counter)
    • Directly supports up to three thermistors (103AT)
  • Hardware protection features
    • Overcurrent in Discharge (OCD)
    • Short Circuit in Discharge (SCD)
    • Overvoltage (OV)
    • Undervoltage (UV)
    • Secondary protector fault detection
  • Additional features
    • Integrated cell balancing FETs
    • Charge, discharge low-side NCH FET drivers
    • Alert interrupt to host microcontroller
    • 2.5-V or 3.3-V output voltage regulator
    • No EEPROM programming necessary
    • High supply voltage absolute maximum (up to 108 V)
    • Simple I2C compatible interface (CRC option)
    • Random cell connection tolerant

The BQ769x0 family of robust analog front-end (AFE) devices serves as part of a complete pack monitoring and protection solution for next-generation, high-power systems, such as light electric vehicles, power tools, and uninterruptible power supplies. The BQ769x0 is designed with low power in mind: Sub-blocks within the IC may be enabled or disabled to control the overall chip current consumption, and a SHIP mode provides a simple way to put the pack into an ultra-low power state.

The BQ76920 device supports up to 5-series cells or typical 18-V packs, the BQ76930 handles up to 10-series cells or typical 36-V packs, and the BQ76940 works for up to 15-series cells or typical 48-V packs. A variety of battery chemistries may be managed with these AFEs, including Li-ion, Li-iron phosphate, and more. Through I2C, a host controller can use the BQ769x0 to implement many battery pack management functions, such as monitoring (cell voltages, pack current, pack temperatures), protection (controlling charge/discharge FETs), and balancing. Integrated A/D converters enable a purely digital readout of critical system parameters, with calibration handled in TI’s manufacturing process.

The BQ769x0 family of robust analog front-end (AFE) devices serves as part of a complete pack monitoring and protection solution for next-generation, high-power systems, such as light electric vehicles, power tools, and uninterruptible power supplies. The BQ769x0 is designed with low power in mind: Sub-blocks within the IC may be enabled or disabled to control the overall chip current consumption, and a SHIP mode provides a simple way to put the pack into an ultra-low power state.

The BQ76920 device supports up to 5-series cells or typical 18-V packs, the BQ76930 handles up to 10-series cells or typical 36-V packs, and the BQ76940 works for up to 15-series cells or typical 48-V packs. A variety of battery chemistries may be managed with these AFEs, including Li-ion, Li-iron phosphate, and more. Through I2C, a host controller can use the BQ769x0 to implement many battery pack management functions, such as monitoring (cell voltages, pack current, pack temperatures), protection (controlling charge/discharge FETs), and balancing. Integrated A/D converters enable a purely digital readout of critical system parameters, with calibration handled in TI’s manufacturing process.

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BQ76952 現行 適用於鋰離子、鋰聚合物和 LiFePO4 的 3s 至 16s 高準確度電池監控器和保護器 Next generation 16s monitor with increased accuracy, protection features, high-side FET driver integrated

技術文件

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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 BQ769x0 3-Series to 15-Series Cell Battery Monitor Family for Li-Ion and Phosphate Applications datasheet (Rev. I) PDF | HTML 2022/3/14
應用說明 Why is short-circuit protection more challenging for high- side driver battery packs than low-side driver? PDF | HTML 2026/1/23
技術文章 為踏板供電:實現適用於電動自行車與電動機車且續航力更長 的 13S、48-v 鋰離子電池組 (Rev. A) PDF | HTML Download English Version (Rev.A) PDF | HTML 2024/5/21
使用指南 bq76920, bq76930, bq76940 AFE FAQ (Rev. A) PDF | HTML 2021/10/1
白皮書 以工業電池組為運輸替代方案提供電源 Download English Version 2020/3/17
技術文章 Fast and furious: designing longer-lasting 16S-17S Li-ion battery packs for e-moto PDF | HTML 2019/11/21
技術文章 Protector, monitor or gauge – selecting the correct battery electronics for your L PDF | HTML 2019/6/13
應用說明 BQ769x0 Pin Equivalent Diagrams (Rev. A) 2019/4/3
應用說明 UART-Based Communication Protocol for Intermodule Communication of Light Vehicle 2017/5/17
應用說明 bq769x0 BMS Configurations for Cordless Appliances 2017/3/23
應用說明 Fault Monitoring for High-Availability Systems using the bq769x0 2017/2/3
應用說明 Embedded Scheduler in Cell Battery Monitor of the bq769x0 2016/8/10
應用說明 bq769x0 Family Top 10 Design Considerations (Rev. A) PDF | HTML 2016/5/2
應用說明 bq769x0 boot switch alternatives 2015/12/21
應用說明 I2C Communication Sample Code for the bq76940 with CRC Based on the MSP430 (Rev. B) 2014/5/14

設計與開發

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開發板

BQ76940EVM — 具有 BQ78350 的 BQ76940 評估板

bq76940EVM 是用於評估 bq76940 類比前端 (AFE) 和 bq78350 電池管理控制器的填充電路板,可作為完整的電池組監控和保護解決方案的一部分,適用於 9 至 15 串聯鋰離子、磷酸鐵鋰電池和更多電池化學物質。  搭配 EV2400 介面轉接器和網站提供的適當評估軟體使用時,可提供完整環境,以評估 AFE 或控制器配置的暫存器控制,並展示使用這些裝置對電池系統的電流控制。

使用指南: PDF
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韌體

SLUC583 — bq769x0 I2C Sample Code With CRC

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支援軟體

SLUC539 — bq76940/bq76930/bq76920 Evaluation Software

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參考設計

TIDA-00255 — 15 芯鋰離子電池控制器類比前端參考設計

TIDA00255 參考設計運用 bq76940 類比前端 (AFE) IC。  它使用 14 位元 ADC 測量電池電壓、晶粒溫度或外部熱敏電阻電壓。  電流由單獨的 16 位元庫侖計數器單獨測量。  此設計可根據所選硬體限制關閉低壓側功率 FET,以停止放電或充電。  此設計中未包含的微控制器可作為電池控制器的一部分,負責與 AFE 通訊以設定保護閾值、開啟功率 FET、提供故障恢復功能,並在溫度過高或過低時關閉場效應晶體管。  電池控制器設計可能包含不屬於此參考設計一部分的其他功能,例如二次過電壓保護、計量及隔離式通訊,以讓系統了解電池狀態。

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參考設計

TIDA-00792 — 多節 36-48V 電池管理系統參考設計

此參考設計可為 12 至 15 芯鋰離子或磷酸鐵鋰電池提供監控、平衡、主要保護與計量功能。此電路板可安裝在工業系統的外殼中。此參考設計提供電池保護與含參數的計量配置,無需進行程式碼開發,並提供高壓側保護切換,允許透過簡易的 PACK 參考 SMBus 通訊以獲取電池狀態,即使在受到保護的情況下也不例外。
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參考設計

TIDA-010030 — 精確電池電量計和 50-μA 待機電流、13-S、48-V 鋰離子電池組參考設計

此參考設計為低待機與運送模式電流消耗,以及高 SOC 電池電量計準確度 13S、48-V 鋰離子電池組設計。此設計以高準確度監控各電池芯電壓、封裝電流和溫度,並保護鋰離子電池組,防止過電壓、欠電壓、過熱和過電流狀況。此 SOC 電池電量計以 bq34z100-g1 為基礎,利用阻抗追蹤演算法,可在室溫下實現高達 2% 的準確度。透過設計精良的輔助電源供應策略與高效、低靜態電流 DC-DC 轉換器 LM5164,此設計可達到 50-μA 待機與 5-μA 運送模式耗電量,可節省更多能源,還可延長運送時間及閒置時間。此外,此設計支援執行良好的韌體,有助於縮短產品研究時間。
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參考設計

TIDA-010074 — 具低電流消耗的 16S-17S 電池組參考設計

此參考設計為低待機與低運送模式電流消耗 16S-17S LiFePO4 鋰離子電池組設計,適用於電信電池備援和電動重型機車。在 2 層 PCB 上實作。9S-15S AFE bq76940 監視較低的 15 電池電壓、而雙通道通用放大器 LM2904B 監控第 16 及第 17 個電池芯電壓。此設計會保護電池組免於過電壓、欠電壓、過電流及過熱,並透過設計良好的輔助電源供應策略和高效率、低靜態電流 DC/DC 轉換器 LM5164,降低待機與運送模式下的耗電量,終能延長運送時間及縮短閒置時間。
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封裝 針腳 CAD 符號、佔位空間與 3D 模型
TSSOP (DBT) 44 Ultra Librarian

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