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電池管理 IC
電池保護器

BQ77915

現行

具有自動電池單元平衡功能的 3 串聯至 5 串聯堆疊式超低功耗主保護器

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產品規格表

BQ77915

現行
產品規格表 立即訂購

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 mm × 6.4 mm)
  • 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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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 BQ77915 3-Series to 5-Series Stackable Ultra-Low Power Primary Protector with Autonomous Cell Balancing and HIBERNATE Mode datasheet (Rev. L) PDF | HTML 2023/8/21
技術文章 Pack a punch in battery pack systems with low-cost MCUs PDF | HTML 2021/11/16
功能安全資訊 BQ77915 Function Safety Capable PDF | HTML 2020/9/7
應用說明 Stacking Implementations with bq77915 (Rev. A) PDF | HTML 2020/8/27
電子書 E-book: An engineer’s guide to industrial robot designs 2020/2/12
應用說明 High Side Charge FET Implementation 2018/7/23
應用說明 Bq77905 Using Multiple FETs PDF | HTML 2016/7/15
應用說明 bq77905 Separate Current Paths (Rev. A) 2016/7/7

設計與開發

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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 (...)
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TSSOP (PW) 24 Ultra Librarian
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