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BQ25172

アクティブ

QFN パッケージ封止、0.8A、1 ~ 6 セル、NiMH スタンドアロン・リニア・チャージャ

製品詳細

Number of series cells 1, 2, 3, 4, 5, 6 Charge current (Max) (A) 0.8 Operating Vin (Max) (V) 18 Cell chemistry NiMH Battery charge voltage (Max) (V) 10.5 Absolute Vin (safety rating) (Max) ((V)) 30 Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation Operating Vin (Min) (V) 3 Rating Catalog
Number of series cells 1, 2, 3, 4, 5, 6 Charge current (Max) (A) 0.8 Operating Vin (Max) (V) 18 Cell chemistry NiMH Battery charge voltage (Max) (V) 10.5 Absolute Vin (safety rating) (Max) ((V)) 30 Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation Operating Vin (Min) (V) 3 Rating Catalog
WSON (DSG) 8 4 mm² 2 x 2
  • Input voltage up to 30-V tolerant
  • Automatic Sleep Mode for low power consumption
    • 350-nA battery leakage current
    • 85-µA input leakage current when charge disabled
  • Supports 1- to 6-cell NiMH with intermittent-charging
  • External resistor programmable operation
    • VSET to set NiMH series cell-count from 1s to 6s
    • ISET to set charge current from 10 mA to 800 mA
    • TMR to set charge safety timer duration from 4 hr to 22 hr
  • High accuracy
    • ±0.5% charge voltage accuracy
    • ±10% charge current accuracy
  • Charging features
    • NTC thermistor input to monitor battery temperature
    • Cold and hot temperature charging disabled
    • VOUT_OVP reduced at cool temperatures
    • TS pin for charging function control
    • Open-drain output for status and fault indication
  • Integrated fault protection
    • 18-V IN overvoltage protection
    • VSET based OUT overvoltage protection
    • 1000-mA overcurrent protection
    • 125°C thermal regulation; 150°C thermal shutdown protection
    • OUT short-circuit protection
    • VSET, ISET, TMR pins short/open protection
  • Input voltage up to 30-V tolerant
  • Automatic Sleep Mode for low power consumption
    • 350-nA battery leakage current
    • 85-µA input leakage current when charge disabled
  • Supports 1- to 6-cell NiMH with intermittent-charging
  • External resistor programmable operation
    • VSET to set NiMH series cell-count from 1s to 6s
    • ISET to set charge current from 10 mA to 800 mA
    • TMR to set charge safety timer duration from 4 hr to 22 hr
  • High accuracy
    • ±0.5% charge voltage accuracy
    • ±10% charge current accuracy
  • Charging features
    • NTC thermistor input to monitor battery temperature
    • Cold and hot temperature charging disabled
    • VOUT_OVP reduced at cool temperatures
    • TS pin for charging function control
    • Open-drain output for status and fault indication
  • Integrated fault protection
    • 18-V IN overvoltage protection
    • VSET based OUT overvoltage protection
    • 1000-mA overcurrent protection
    • 125°C thermal regulation; 150°C thermal shutdown protection
    • OUT short-circuit protection
    • VSET, ISET, TMR pins short/open protection

The BQ25172 is an integrated 800-mA linear charger for 1-cell to 6-cell NiMH batteries targeted at industrial and medical applications. The device has a single power output that charges the battery. The system load can be placed in parallel with the battery, as long as the average system load does not prevent the battery from being charged fully within the safety timer duration. When the system load is placed in parallel with the battery, the charge current is shared between the system and the battery.

The device charges NiMH cells in constant current mode only and terminates the charge cycle when the programmable timer expires or the battery voltage exceeds the VOUT_OVP threshold. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold TREG, is exceeded.

The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current, charge status display, and timer-based charge termination. The series cell-count, charge current, and charge timer are programmable through external resistors. Intermittent charging allows a NiMH battery to automatically recharge for a reduced timer duration once its voltage falls below the recharge threshold.

The BQ25172 is an integrated 800-mA linear charger for 1-cell to 6-cell NiMH batteries targeted at industrial and medical applications. The device has a single power output that charges the battery. The system load can be placed in parallel with the battery, as long as the average system load does not prevent the battery from being charged fully within the safety timer duration. When the system load is placed in parallel with the battery, the charge current is shared between the system and the battery.

The device charges NiMH cells in constant current mode only and terminates the charge cycle when the programmable timer expires or the battery voltage exceeds the VOUT_OVP threshold. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold TREG, is exceeded.

The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current, charge status display, and timer-based charge termination. The series cell-count, charge current, and charge timer are programmable through external resistors. Intermittent charging allows a NiMH battery to automatically recharge for a reduced timer duration once its voltage falls below the recharge threshold.

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BQ25171-Q1 アクティブ 車載対応、1 ~ 2 セルのリチウムイオンと LiFePO4 向け、または 1 ~ 6 セル のNiMH 向け、800mA リニア・バッテリ・チャージャ

This part can support Li+ battery charging.

技術資料

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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 BQ25172: 800-mA Linear Battery Charger for 1- to 6-Cell NiMH Batteries データシート PDF | HTML 2022年 6月 1日
ユーザー・ガイド BQ25172EVM Evaluation Module User's Guide PDF | HTML 2022年 7月 22日
技術記事 When to use rechargeable batteries in small battery applications 2019年 10月 1日
技術記事 Should I use a linear charger or a switching charger? 2015年 10月 31日
技術記事 Summertime and the livin' is easy 2014年 6月 20日

設計および開発

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パッケージ ピン数 ダウンロード
WSON (DSG) 8 オプションの表示

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 rating / リフローピーク温度
  • MTBF/FIT 推定値
  • 原材料組成
  • 認定試験結果
  • 継続的な信頼性モニタ試験結果

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