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バッテリ・プロテクタ

BQ77910A

新規設計での使用を推奨しません

スタンドアロン、4～10 セル、高精度プロテクタ、リチウムイオン・バッテリー用

ご注文はこちら
データシート
BQ77910A は新規設計での使用を推奨しません
これまでにご購入されたお客様をサポートする目的でこの製品を引き続き生産しています。新規設計では代替品をご検討ください。
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比較対象デバイスと類似の機能
BQ77915 アクティブ 3S ～ 5S に対応したスタッカブルな超低消費電力の 1 次側プロテクタ、自律型セル・バランシング機能搭載 3-5S stackable over voltage protector with cell balancing

BQ77910A

新規設計での使用を推奨しません
データシート ご注文はこちら

製品詳細

Function Protection Rating Catalog Operating temperature range (°C) -40 to 85
Function Protection Rating Catalog Operating temperature range (°C) -40 to 85
TSSOP (DBT) 38 62.08 mm² 9.7 x 6.4
  • 4-, 5-, 6-, 7-, 8-, 9-, or 10-Series Cell Protection
  • Individual Cell-Voltage Monitoring
  • Low-Side NMOS FET Drive for Charge and Discharge Control
  • Compatible With 1-mΩ Current-Sense Resistor
  • Supply-Voltage Range From 5.6 V to 50 V
  • Integrated 3.3-V Micro-Power LDO Regulator
  • Low Supply Current
    • Normal Mode: 50 µA, Typical
    • Shutdown Mode, LDO OFF: 3 µA, Typical
  • 38-Pin TSSOP Package
  • Internal 50-mA Automatic Cell Balancing
  • 4-, 5-, 6-, 7-, 8-, 9-, or 10-Series Cell Protection
  • Individual Cell-Voltage Monitoring
  • Low-Side NMOS FET Drive for Charge and Discharge Control
  • Compatible With 1-mΩ Current-Sense Resistor
  • Supply-Voltage Range From 5.6 V to 50 V
  • Integrated 3.3-V Micro-Power LDO Regulator
  • Low Supply Current
    • Normal Mode: 50 µA, Typical
    • Shutdown Mode, LDO OFF: 3 µA, Typical
  • 38-Pin TSSOP Package
  • Internal 50-mA Automatic Cell Balancing

The bq77910A is a battery protection and cell balancing device intended for Li-Ion and Li-Polymer battery packs.

The bq77910A monitors 4- to 10-series individual cell voltages and provides fast-acting outputs that may be used to drive N-channel MOSFETs to interrupt the power path. Activation delays and recovery methods for safety conditions are fully programmable in non-volatile memory.

Automatic cell balancing is provided using internal 50-mA cell circuits. A robust balancing algorithm ensures optimum performance by maintaining all cell voltages in balance. Balancing may be configured to operate at all times, only during charge, or can be disabled completely.

WARNING: The bq77910A-series integrated circuit helps system designers greatly enhance the safety of their Li-Ion and Li-Polymer battery packs when integrated effectively and in accordance with the instructions detailed in this document by technically qualified personnel familiar with battery pack application safety. This data sheet must be read in its entirety before working with the bq77910A.

Additional advanced safety features of the bq77910A include the ability to control split power-path MOSFETs, an open-cell sense-line detection mechanism, and the ability to detect an open or shorted external temperature sensor fault condition.

Programmable Protection Functions

  • Wide range of programmable detection thresholds and delay times
  • Configurable for multiple cell types and application requirements:
    • Cell overvoltage
    • Cell undervoltage
    • Pack discharge overcurrent
    • Pack discharge short circuit
    • Pack charge short-circuit current
  • Variable gain (×1 or ×5) current-sense circuit
    • Compatible with a wide range of current-sense resistors (1-mΩ to 5-mΩ typical) sized for application requirements

Fixed Hardware Protection Functions

  • Preset overtemperature protections
  • Open-cell detection
  • Open and shorted thermistor detection
  • Brownout protection quickly shuts off FETs under low-battery conditions to minimize the risk of FET overheating

The bq77910A is a battery protection and cell balancing device intended for Li-Ion and Li-Polymer battery packs.

The bq77910A monitors 4- to 10-series individual cell voltages and provides fast-acting outputs that may be used to drive N-channel MOSFETs to interrupt the power path. Activation delays and recovery methods for safety conditions are fully programmable in non-volatile memory.

Automatic cell balancing is provided using internal 50-mA cell circuits. A robust balancing algorithm ensures optimum performance by maintaining all cell voltages in balance. Balancing may be configured to operate at all times, only during charge, or can be disabled completely.

WARNING: The bq77910A-series integrated circuit helps system designers greatly enhance the safety of their Li-Ion and Li-Polymer battery packs when integrated effectively and in accordance with the instructions detailed in this document by technically qualified personnel familiar with battery pack application safety. This data sheet must be read in its entirety before working with the bq77910A.

Additional advanced safety features of the bq77910A include the ability to control split power-path MOSFETs, an open-cell sense-line detection mechanism, and the ability to detect an open or shorted external temperature sensor fault condition.

Programmable Protection Functions

  • Wide range of programmable detection thresholds and delay times
  • Configurable for multiple cell types and application requirements:
    • Cell overvoltage
    • Cell undervoltage
    • Pack discharge overcurrent
    • Pack discharge short circuit
    • Pack charge short-circuit current
  • Variable gain (×1 or ×5) current-sense circuit
    • Compatible with a wide range of current-sense resistors (1-mΩ to 5-mΩ typical) sized for application requirements

Fixed Hardware Protection Functions

  • Preset overtemperature protections
  • Open-cell detection
  • Open and shorted thermistor detection
  • Brownout protection quickly shuts off FETs under low-battery conditions to minimize the risk of FET overheating
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種類 タイトル 最新の英語版をダウンロード 日付
* データシート bq77910A Multi-Cell Lithium-Ion/Polymer Precision Protector データシート (Rev. A) 2014年 9月 16日

購入と品質

記載されている情報：
  • RoHS
  • REACH
  • デバイスのマーキング
  • リード端子の仕上げ / ボールの原材料
  • MSL 定格 / ピーク リフロー
  • MTBF/FIT 推定値
  • 使用原材料
  • 認定試験結果
  • 継続的な信頼性モニタ試験結果
記載されている情報：
  • ファブの拠点
  • 組み立てを実施した拠点