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電池保護器

BQ2961

現行

具有 LDO 輸出的 2-4S 過電壓保護器

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產品規格表

BQ2961

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Number of series cells (max) 3, 4 Number of series cells (min) 2, 3, 4 Features LDO output, Overvoltage, Single pin output drive, Undervoltage Function Protection Operating current (typ) (µA) 1 Vin (max) (V) 20 Overvoltage protection 4.25, 4.35, 4.45, 4.5 Operating temperature range (°C) -40 to 110 Battery overvoltage protection (min) (V) 3.85 Battery overvoltage protection (max) (V) 4.6
Rating Catalog Number of series cells (max) 3, 4 Number of series cells (min) 2, 3, 4 Features LDO output, Overvoltage, Single pin output drive, Undervoltage Function Protection Operating current (typ) (µA) 1 Vin (max) (V) 20 Overvoltage protection 4.25, 4.35, 4.45, 4.5 Operating temperature range (°C) -40 to 110 Battery overvoltage protection (min) (V) 3.85 Battery overvoltage protection (max) (V) 4.6
WSON (DSG) 8 4 mm² 2 x 2
  • 2-series, 3-series, and 4-series cell overvoltage protection (OVP)
  • Fixed delay timer to trigger FET drive output (3-s, 4-s, 5.5-s, or 6.5-s options)
  • Factory programmed OVP threshold (threshold range 3.85V to 4.6V)
  • Output options: active high
  • High-accuracy overvoltage protection: ±10mV
  • Regulated supply output with self-disable and/or external enable/disable control
    • Options: 3.3V, 2.5V, and 1.8V (BQ2961)
    • Options: 3.3V, 3.15V, 3.0V (BQ2962)
  • Low power consumption ICC ~ 4µA (VCELL(ALL) < VPROTECT)
  • Extra low power consumption with reg output disabled, ICC ~ 1.2µA
  • Low leakage current per cell input < 100nA
  • Small package footprint
    • 8-Pin WSON (2mm × 2mm)
  • 2-series, 3-series, and 4-series cell overvoltage protection (OVP)
  • Fixed delay timer to trigger FET drive output (3-s, 4-s, 5.5-s, or 6.5-s options)
  • Factory programmed OVP threshold (threshold range 3.85V to 4.6V)
  • Output options: active high
  • High-accuracy overvoltage protection: ±10mV
  • Regulated supply output with self-disable and/or external enable/disable control
    • Options: 3.3V, 2.5V, and 1.8V (BQ2961)
    • Options: 3.3V, 3.15V, 3.0V (BQ2962)
  • Low power consumption ICC ~ 4µA (VCELL(ALL) < VPROTECT)
  • Extra low power consumption with reg output disabled, ICC ~ 1.2µA
  • Low leakage current per cell input < 100nA
  • Small package footprint
    • 8-Pin WSON (2mm × 2mm)

The BQ296xxx family is a high-accuracy, low-power overvoltage protector with a 2mA regulated output supply for Li-ion battery pack applications.

Each cell in a 2-series to 4-series cell stack is individually monitored for an overvoltage condition. An internally fixed-delay timer is initiated upon detection of an overvoltage condition on any cell. Upon expiration of the delay timer, an output pin is triggered into an active state to indicate that an overvoltage condition has occurred.

The regulated output supply delivers up to 2mA (max) output current to drive always-on circuits, such as a real-time clock (RTC) oscillator. The BQ296xxx family has a self-disable function to turn off the regulated output if any cell voltage falls below a certain threshold, thereby preventing drain on the battery, and provides an external control to enable or disable the regulated output.

The BQ296xxx family is a high-accuracy, low-power overvoltage protector with a 2mA regulated output supply for Li-ion battery pack applications.

Each cell in a 2-series to 4-series cell stack is individually monitored for an overvoltage condition. An internally fixed-delay timer is initiated upon detection of an overvoltage condition on any cell. Upon expiration of the delay timer, an output pin is triggered into an active state to indicate that an overvoltage condition has occurred.

The regulated output supply delivers up to 2mA (max) output current to drive always-on circuits, such as a real-time clock (RTC) oscillator. The BQ296xxx family has a self-disable function to turn off the regulated output if any cell voltage falls below a certain threshold, thereby preventing drain on the battery, and provides an external control to enable or disable the regulated output.
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* Data sheet BQ296xxx Overvoltage Protection for 2-Series, 3-Series, and 4-Series Cell Li-Ion Batteries with Regulated Output Supply datasheet (Rev. V) PDF | HTML 2025年 9月 17日

設計與開發

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開發板

BQ4050EVM-561 — 1 節、2 節、3 節和 4 節鋰離子電池組管理員評估模組

BQ4050EVM 為一完整系統，使用 CEDV 量測演算法評估 bq4050 電量計功能。如 BQ4050 產品資料夾所述，此電量計適用於由多芯電池系統供電的應用。此 EVM 包括一個 bq4050 電路模組、一個電流感測電阻器和四個熱敏電阻。
使用指南: PDF
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開發板

BQ40Z50EVM-561 — BQ40Z50 評估板 

BQ40z50EVM 是用於評估 bq40z50 電量計功能的完整系統。如 BQ40z50 產品資料夾所述，此電量計適用於由多芯電池系統供電的應用。此 EVM 包括一個 bq40z50 電路模組、一個電流感測電阻器和四個熱敏電阻。

使用指南: PDF | HTML
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參考設計

TIDA-00883 — 1 至 4 節串聯鋰離子電池組管理器參考設計

德州儀器 bq40z50-R1 裝置是一款電池組管理器，整合了電量計量與保護功能，可實現 1 至 4 串聯鋰離子與鋰聚合物電池組的完全自主運作。此架構可透過 SMBus 廣播命令，實現電量計量處理器與外部電池充電器控制器之間的通訊。
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