BQ25308
- Standalone charger and easy to configure
- High-efficiency, 1.2MHz, synchronous switch-mode buck charger
- 92.5% charge efficiency at 2A from 5V input for 1-cell battery
- 91.8% charge efficiency at 2A from 9V input for 1-cell battery
- Single input to support USB input and high voltage adaptors
- Supports 4.1V - 17V input voltage range with 28V 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
- 3.6V / 4.05V / 4.15V / 4.2V charge voltage
- 3.0A maximum fast charge current
- 200nA low battery leakage current at 4.5V VBAT
- 4.25µA 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
- Disable charge for dead battery condition
- 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
- Cold/hot battery temperature protection
- Fault report on STAT pin
- Available in a WQFN 3x3-16 package
The BQ25308 is a highly-integrated standalone switch-mode battery charger for 1-cell Li-ion, Li-polymer, and LiFePO4 batteries. The BQ25308 supports 4.1V to 17V input voltage and 3A fast charge current. The integrated current sensing topology of the device enables high charge efficiency and low BOM cost. The best-in-class 200nA low quiescent current of the device conserves battery energy and maximizes the shelf time for portable devices. The BQ25308 is available in a 3x3 WQFN package for easy 2-layer layout and space limited applications.
The BQ25308 supports a 4.1V to 17V input to charge single cell batteries. The BQ25308 provides up to 3A 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 the 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 device also provides a safety feature that completely inhibits charging of a dead battery.
The BQ25308 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 BQ25308 charge voltage and charge current are set by external resistors. The BQ25308 detects 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 BQ25308 is available in a 3mm x 3mm thin WQFN package.
技術資料
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 | BQ25308 Standalone 1-Cell, 17V, 3.0A Battery Charger with Dead Battery Charge Inhibit データシート | PDF | HTML | 2024年 4月 9日 | ||
EVM ユーザー ガイド (英語) | BQ25308 Evaluation Module User’s Guide | PDF | HTML | 2024年 4月 9日 | |||
証明書 | BQ25308EVM EU Declaration of Conformity (DoC) | 2024年 4月 5日 |
設計と開発
その他のアイテムや必要なリソースを参照するには、以下のタイトルをクリックして詳細ページをご覧ください。
BQ25308EVM — BQ25308 の評価基板
BQ25308 評価基板 (EVM) は、BQ25308 デバイスの評価に使用できる包括的なチャージャ モジュールです。このデバイスは、1 個のセルに 17V、3A を供給するスタンドアロンの高集積 1.2MHz 同期スイッチ モード降圧バッテリ チャージャです。
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 |
購入と品質
- 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
- 材質成分
- 認定試験結果
- 継続的な信頼性モニタ試験結果
- ファブの拠点
- 組み立てを実施した拠点
推奨製品には、この TI 製品に関連するパラメータ、評価基板、またはリファレンス デザインが存在する可能性があります。