產品詳細資料

Rating Catalog Number of series cells (max) 4, 5 Number of series cells (min) 3, 4, 5 Features Cell balancing, FET drive, Open wire (OW), Over-temperature (OT), Overcurrent during charge (OCC), Overcurrent during discharge (OCD), Overvoltage, Short-circuit Discharge (SCD), Stackable, Under-temperature (UT), Undervoltage Function Protection Operating current (typ) (µA) 8 Vin (max) (V) 25 TI functional safety category Functional Safety-Capable Overvoltage protection 3.8, 4.2, 4.25, 4.275, 4.3 Operating temperature range (°C) -40 to 85 Battery overvoltage protection (min) (V) 3 Battery overvoltage protection (max) (V) 4.575
Rating Catalog Number of series cells (max) 4, 5 Number of series cells (min) 3, 4, 5 Features Cell balancing, FET drive, Open wire (OW), Over-temperature (OT), Overcurrent during charge (OCC), Overcurrent during discharge (OCD), Overvoltage, Short-circuit Discharge (SCD), Stackable, Under-temperature (UT), Undervoltage Function Protection Operating current (typ) (µA) 8 Vin (max) (V) 25 TI functional safety category Functional Safety-Capable Overvoltage protection 3.8, 4.2, 4.25, 4.275, 4.3 Operating temperature range (°C) -40 to 85 Battery overvoltage protection (min) (V) 3 Battery overvoltage protection (max) (V) 4.575
TSSOP (PW) 24 49.92 mm² 7.8 x 6.4
  • Ultra-low quiescent current: 8 µA typ. (NORMAL mode), 2 µA (HIBERNATE mode)
  • Full suite of voltage, current, and temperature protections
  • Smart passive cell balancing removes cell-to-cell imbalance
  • Scalable cell count from 3 series to 20 series or more
  • Voltage protection (accuracy ±10 mV for OV, ±18 mV for UV)
    • Overvoltage: 3 V to 4.575 V
    • Undervoltage: 1.2 V to 3 V
  • Open cell and open-wire detection (OW)
  • Current protection
    • Overcurrent discharge 1: –10 mV to –85 mV
    • Overcurrent discharge 2: –20 mV to –170 mV
    • Short-circuit discharge: –40 mV to –340 mV
  • Temperature protection
    • Overtemperature charge: 45°C or 50°C
    • Overtemperature discharge: 65°C or 70°C
  • Additional features:
    • Independent charge (CHG) and discharge (DSG) FET drivers
    • Smart cell balancing algorithm with integrated FETs (up to 50-mA balancing current), also supports external FETs for higher cell-balancing current
    • Ultra-low power HIBERNATE mode
    • High 36-V absolute maximum rating per cell input
    • Resistor programmable overcurrent (OCD1/2) delay
  • SHUTDOWN mode: 0.5-µA maximum
  • Functional Safety-Capable
  • Ultra-low quiescent current: 8 µA typ. (NORMAL mode), 2 µA (HIBERNATE mode)
  • Full suite of voltage, current, and temperature protections
  • Smart passive cell balancing removes cell-to-cell imbalance
  • Scalable cell count from 3 series to 20 series or more
  • Voltage protection (accuracy ±10 mV for OV, ±18 mV for UV)
    • Overvoltage: 3 V to 4.575 V
    • Undervoltage: 1.2 V to 3 V
  • Open cell and open-wire detection (OW)
  • Current protection
    • Overcurrent discharge 1: –10 mV to –85 mV
    • Overcurrent discharge 2: –20 mV to –170 mV
    • Short-circuit discharge: –40 mV to –340 mV
  • Temperature protection
    • Overtemperature charge: 45°C or 50°C
    • Overtemperature discharge: 65°C or 70°C
  • Additional features:
    • Independent charge (CHG) and discharge (DSG) FET drivers
    • Smart cell balancing algorithm with integrated FETs (up to 50-mA balancing current), also supports external FETs for higher cell-balancing current
    • Ultra-low power HIBERNATE mode
    • High 36-V absolute maximum rating per cell input
    • Resistor programmable overcurrent (OCD1/2) delay
  • SHUTDOWN mode: 0.5-µA maximum
  • Functional Safety-Capable

The BQ77915 device is a low-power battery pack protector that implements a suite of voltage, current, and temperature protections and a smart cell balancing algorithm without microcontroller (MCU) control. The device’s stackable interface provides simple scaling to support battery cell applications from 3 series to 20 series or more. Protection thresholds and delays are factory-programmed and available in a variety of configurations. Separate overtemperature and undertemperature thresholds for discharge (OTD and UTD) and charge (OTC and UTC) provide additional flexibility.

The BQ77915 device is a low-power battery pack protector that implements a suite of voltage, current, and temperature protections and a smart cell balancing algorithm without microcontroller (MCU) control. The device’s stackable interface provides simple scaling to support battery cell applications from 3 series to 20 series or more. Protection thresholds and delays are factory-programmed and available in a variety of configurations. Separate overtemperature and undertemperature thresholds for discharge (OTD and UTD) and charge (OTC and UTC) provide additional flexibility.

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BQ77216 現行 具有內部延遲計時器,且適用於 3-s 至 16-s 芯鋰離子電池的電壓和溫度保護 3- to 5-S primary protector with cell balancing.

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重要文件 類型 標題 格式選項 日期
* Data sheet BQ77915 3-Series to 5-Series Stackable Ultra-Low Power Primary Protector with Autonomous Cell Balancing and HIBERNATE Mode datasheet (Rev. L) PDF | HTML 2023年 8月 21日
Technical article Pack a punch in battery pack systems with low-cost MCUs PDF | HTML 2021年 11月 16日
Functional safety information BQ77915 Function Safety Capable PDF | HTML 2020年 9月 7日
Application note Stacking Implementations with bq77915 (Rev. A) PDF | HTML 2020年 8月 27日
E-book E-book: An engineer’s guide to industrial robot designs 2020年 2月 12日
Application note High Side Charge FET Implementation 2018年 7月 23日
Application note Bq77905 Using Multiple FETs 2016年 7月 15日
Application note bq77905 Separate Current Paths (Rev. A) 2016年 7月 7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

BQ77915EVM-014 — BQ77915 3 串聯至 5 串聯可堆疊超低功耗主保護器評估模組

BQ77915EVM-014 評估模組 (EVM) 是針對鋰離子電池 BQ77915 3 串聯至 5 串聯低功耗保護器的完整評估系統。EVM 包含一個 BQ77915 和 FET,可控制鋰離子電池組中典型切換電流配置的電流。電路模組包括一個 BQ77915 積體電路 (IC),一個感測電阻器,一個熱敏電阻,兩個 FET,以及切換充電和放電電流所需的所有其他板載元件。

電路模組連接電池電源和電池組負載。除了套用至模組的電流和電壓外,使用者也可移除板載跨接器以模擬過熱或過低情況,以觀察在不同充電和放電條件下的 FET 控制。也可在模組上平衡不相符的電池單元。

使用指南: PDF
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參考設計

PMP40441 — 適用於 USB PD PPS 的多芯降壓-升壓電池充電器系統參考設計

此參考設計適用於 USB 電力傳輸 (PD) 電池充電應用,例如行動電源或其他攜帶式裝置。其採用降壓升壓充電器 BQ25713,可提供 USB PD 充電的廣泛輸入與輸出範圍。USB PD 控制器卡 (PMP40442) 可將充電器配置為透過相同電源路徑,以同時執行充電或 OTG。PMP40441/2 與 PD2.0 相容。其亦展示了 BQ25713 支援 PD 可編程電源供應器 (PPS) 標準的能力。在 OTG 指令(即:以行動電源做為電源)中,USB 連接埠可輸出固定的 USB PD 電壓為 – 5/9/15/20V 和 USB PD PPS 電壓為 3.3V 至 (...)
Test report: PDF
電路圖: PDF
封裝 針腳 CAD 符號、佔位空間與 3D 模型
TSSOP (PW) 24 Ultra Librarian

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