Standalone 1-cell 17-V, 3.0-A battery charger with JEITA battery temperature monitoring




Number of series cells 1 Charge current (Max) (A) 3 Operating Vin (Max) (V) 17 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (Min) (V) 4.1 Battery charge voltage (Max) (V) 4.4 Absolute Vin (safety rating) (Max) ((V)) 28 Control topology Switch-Mode Buck Control interface Standalone Features BAT temp thermistor monitoring (JEITA profile) Operating Vin (Min) (V) 4 Rating Catalog open-in-new その他の バッテリ・チャージャ IC


WQFN (RTE) 16 9 mm² 3 x 3 open-in-new その他の バッテリ・チャージャ IC


  • Standalone charger and easy to configure
  • High-efficiency, 1.2-MHz, synchronous switch-mode buck charger
    • 92.5% charge efficiency at 2A from 5-V input for 1-cell battery
    • 91.8% charge efficiency at 2A from 9-V input for 1-cell battery
  • Single input to support USB input and high voltage adaptors
    • Support 4.1-V - 17-V input voltage range with 28-V absolute maximum input voltage rating
    • Input Voltage Dynamic Power Management (VINDPM) tracking battery voltage
  • High integration
    • Integrated reverse blocking and synchronous switching MOSFET
    • Internal input and charge current sense
    • Internal loop compensation
    • Integrated bootstrap diode
  • 4.1-V / 4.2-V / 4.35-V / 4.4-V charge voltage
  • 3.0-A maximum fast charge current
  • 200-nA low battery leakage current at 4.5-V VBAT
  • 4.25-µA VBUS supply current in IC disable mode
  • Charge current thermal regulation at 120°C
  • Precharge current: 10% of fast charge current
  • Termination current: 10% of fast charge current
  • Charge accuracy
    • ±0.5% charge voltage regulation
    • ±10% charge current regulation
  • Safety
    • Thermal regulation and thermal shutdown
    • Input Under-Voltage Lockout (UVLO) and Over-Voltage Protection (OVP)
    • Battery overcharge protection
    • Safety timer for precharge and fast charge
    • Charge disabled if current setting pin ICHG is open or short
    • JEITA Battery temperature protection
    • Fault report on STAT pin
  • Available in WQFN 3x3-16 package

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The BQ25303J is a highly-integrated standalone switch-mode battery charger for 1-cell Li-ion and Li-polymer batteries. The BQ25303J supports 4.1-V to 17-V input voltage and 3-A fast charge current. The integrated current sensing topology of the device enables high charge efficiency and low BOM cost. The best-in-class 200-nA low quiescent current of the device conserves battery energy and maximizes the shelf time for portable devices. The BQ25303J is available in a 3x3 WQFN package for easy 2-layer layout and space limited applications.

The BQ25303Jsupports 4.1-V to 17-V input to charge single cell batteries. The BQ25303Jprovides up to 3-A continuous charge current to a single cell 1S battery The device features fast charging for portable devices. Its input voltage regulation delivers maximum charging power to the battery from input source. The solution is highly integrated with an input reverse-blocking FET (RBFET, Q1), high-side switching FET (HSFET, Q2), and low-side switching FET (LSFET, Q3).

The BQ25303J features lossless integrated current sensing to reduce power loss and BOM cost with minimized component count. It also integrates a bootstrap diode for the high-side gate drive and battery temperature monitor to simplify system design. The device initiates and completes a charging cycle without host control. The BQ25303J charge voltage and charge current are set by external resistors. The BQ25303Jdetects the charge voltage setting at startup and charges the battery in four phases: battery short, pre-conditioning, constant current, and constant voltage. At the end of the charging cycle, the charger automatically terminates if the charge current is below the termination current threshold and the battery voltage is above the recharge threshold. When the battery voltage falls below the recharge threshold, the charger will automatically start another charging cycle. The charger provides various safety features for battery charging and system operations, including battery temperature monitoring based on negative temperature coefficient (NTC) thermistor, charge safety timer, input over-voltage and over-current protections, as well as battery over-voltage protection. Pin open and short protection is also built in to protect against the charge current setting pin ICHG accidently open or short to GND. The thermal regulation regulates charge current to limit die temperature during high power operation or high ambient temperature conditions.

The STAT pin output reports charging status and fault conditions. When the input voltage is removed, the device automatically enters HiZ mode with very low leakage current from battery to the charger device. The BQ25303J is available in a 3 mm x 3 mm thin WQFN package.

open-in-new その他の バッテリ・チャージャ IC


star = TI が選択したこの製品の主要ドキュメント
すべて表示 5
種類 タイトル 英語版のダウンロード 日付
* データシート BQ25303J スタンドアロン 17V、3.0A シングル・セル降圧バッテリ・チャージャ、JEITA 準拠 データシート 2021年 2月 4日
ユーザー・ガイド BQ25302 Evaluation Module (EVM) User's Guide (Rev. A) 2021年 3月 5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




評価ボード ダウンロード
document-generic ユーザー・ガイド
The BQ25303JEVM evaluation module (EVM) is used to evaluate the BQ25303J device. This is a highly integrated 3-A standalone 1-cell, 17-V, 1.2-MHz synchronous switch mode buck battery charger with JEITA battery temperature monitoring.
  • High efficiency 1.2-MHz synchronous switch mode buck charger
  • Single input to support USB input adapters
  • Input voltage dynamic power management (VINDPM)
  • 1-µA low battery leakage current with adapter unplugged
  • Supports 300-mA to 3-A charge current
  • Suppports JEITA battery temperature profile

CAD/CAE シンボル

パッケージ ピン数 ダウンロード
WQFN (RTE) 16 オプションの表示


  • RoHS
  • 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 の推定値
  • 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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