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電池管理 IC
電池監控器和平衡器

BQ76940

現行

9 至 15 串聯芯鋰電池和磷酸鐵鋰電池監控器 (bq76940 系列)

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產品規格表

BQ76940

現行
產品規格表 立即訂購

產品詳細資料

Number of series cells (min) 9 Vin (max) (V) 75 Features Digital output, LDO output, Low-side driver, Overcurrent in discharging protection, Short-current detection Device type Cell monitor and balancer Number of series cells (max) 15 Operating temperature range (°C) -40 to 85 Rating Catalog Battery overvoltage protection (min) (V) 3.15 Battery overvoltage protection (max) (V) 4.7 Communication interface I2C Operating current (typ) (µA) 40
Number of series cells (min) 9 Vin (max) (V) 75 Features Digital output, LDO output, Low-side driver, Overcurrent in discharging protection, Short-current detection Device type Cell monitor and balancer Number of series cells (max) 15 Operating temperature range (°C) -40 to 85 Rating Catalog Battery overvoltage protection (min) (V) 3.15 Battery overvoltage protection (max) (V) 4.7 Communication interface I2C Operating current (typ) (µA) 40
TSSOP (DBT) 44 71.36 mm² 11.15 x 6.4
  • 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 3-s 至 16-s 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

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類型 標題 日期
* Data sheet BQ769x0 3-Series to 15-Series Cell Battery Monitor Family for Li-Ion and Phosphate Applications datasheet (Rev. I) PDF | HTML 2022年 3月 14日
Technical article 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 2024年 5月 21日
User guide bq76920, bq76930, bq76940 AFE FAQ (Rev. A) PDF | HTML 2021年 10月 1日
White paper 以工業電池組為運輸替代方案提供電源 2020年 3月 17日
Technical article Fast and furious: designing longer-lasting 16S-17S Li-ion battery packs for e-moto PDF | HTML 2019年 11月 21日
Technical article Protector, monitor or gauge – selecting the correct battery electronics for your L PDF | HTML 2019年 6月 13日
Application note BQ769x0 Pin Equivalent Diagrams (Rev. A) 2019年 4月 3日
User guide bq76930 and bq76940 Evaluation Module (Rev. C) 2018年 12月 10日
Application note UART-Based Communication Protocol for Intermodule Communication of Light Vehicle 2017年 5月 17日
Application note bq769x0 BMS Configurations for Cordless Appliances 2017年 3月 23日
Application note Fault Monitoring for High-Availability Systems using the bq769x0 2017年 2月 3日
Application note Embedded Scheduler in Cell Battery Monitor of the bq769x0 2016年 8月 10日
Application note bq769x0 Family Top 10 Design Considerations (Rev. A) PDF | HTML 2016年 5月 2日
Application note bq769x0 boot switch alternatives 2015年 12月 21日
Application note I2C Communication Sample Code for the bq76940 with CRC Based on the MSP430 (Rev. B) 2014年 5月 14日

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

BQ76940EVM — 具有 BQ78350 的 BQ76940 評估板

The bq76940EVM is a populated circuit board for evaluation of the bq76940 analog front-end (AFE) along with the bq78350 Battery Management Controller that serves as part of a complete pack monitoring and protection solution for 9 to 15-series Lithium Ion, Lithium iron phosphate, and more battery (...)

使用指南: PDF
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韌體

SLUC583 — bq769x0 I2C Sample Code With CRC

支援產品和硬體

支援產品和硬體

產品
電池監控器和平衡器
BQ76920 — 3 至 5 串聯芯鋰電池和磷酸鐵鋰電池監控器 (bq76940 系列) BQ76930 — 6 至 10 串聯芯鋰電池和磷酸鐵鋰電池監控器 (bq76940 系列) BQ76940 — 9 至 15 串聯芯鋰電池和磷酸鐵鋰電池監控器 (bq76940 系列)
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支援軟體

SLUC539 — bq76940/bq76930/bq76920 Evaluation Software

支援產品和硬體

支援產品和硬體

產品
電池監控器和平衡器
BQ76920 — 3 至 5 串聯芯鋰電池和磷酸鐵鋰電池監控器 (bq76940 系列) BQ76930 — 6 至 10 串聯芯鋰電池和磷酸鐵鋰電池監控器 (bq76940 系列) BQ76940 — 9 至 15 串聯芯鋰電池和磷酸鐵鋰電池監控器 (bq76940 系列)
硬體開發
開發板
BQ76920EVM — 具有 BQ78350 的 BQ76920 評估板 BQ76930EVM — 具有 BQ78350 的 BQ76930 評估板 BQ76940EVM — 具有 BQ78350 的 BQ76940 評估板
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參考設計

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

This reference design is a low standby and ship mode current consumption and high SOC gauging accuracy 13S, 48-V Li-ion battery pack design. It monitors each cell voltage, pack current and temperature with high accuracy and protects the Li-ion battery pack against overvoltage, undervoltage, over (...)
Design guide: PDF
電路圖: PDF
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。
Design guide: PDF
電路圖: PDF
參考設計

TIDA-00792 — 多節 36-48V 電池管理系統參考設計

This reference design provides monitoring, balancing, primary protection and gauging for a 12- to 15-cell lithium-ion or lithium-iron phosphate-based batteries. This board is intended to be mounted in an enclosure for industrial systems. The reference design provides battery protection and gauging (...)
Design guide: PDF
電路圖: PDF
參考設計

TIDA-00255 — 15 芯鋰離子電池控制器類比前端參考設計

The TIDA00255 reference design utilizes the bq76940 analog front end (AFE) IC.  It measures cell voltages, and die temperature or external thermistor voltage using a 14 bit ADC.  Current is measured separately by a separate 16 bit coulomb counter.  The design can turn off low side (...)
Test report: PDF
電路圖: PDF
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TSSOP (DBT) 44 Ultra Librarian
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