BQ25620
- High-efficiency, 1.5MHz, synchronous switching mode buck charger for single cell battery
- >90% efficiency down to 25mA output current from 5V input
- Charge termination from 10mA to 620mA, 10mA steps
- Flexible JEITA profile for safe charging over temperature
- BATFET control to support shutdown, ship mode and full system reset
- 1.5µA quiescent current in battery only mode
- 0.15µA battery leakage current in ship mode
- 0.1µA battery leakage current in shutdown
- Supports USB On-The-Go (OTG)
- Boost mode supporting 3.84V to 9.6V output
- >90% boost efficiency down to 100mA OTG current for 5V VBUS
- Supports a wide range of input sources
- 3.9V to 18V wide input operating voltage range with 26V absolute maximum input voltage
- Maximizes source power with input voltage regulation (VINDPM) and input current regulation (IINDPM)
- VINDPM threshold automatically tracks battery voltage
- Efficient battery operation with 15mΩ BATFET
- Narrow VDC (NVDC) power path management
- System instant-on with depleted or no battery
- Battery supplement when adapter is fully loaded
- Flexible autonomous or I2C-controlled modes
- Integrated 12-bit ADC for voltage, current, temperature monitoring
- High accuracy
- ±0.5% charge voltage regulation
- ±5% charge current regulation
- ±5% input current regulation
- Safety
- Thermal regulation and thermal shutdown
- Input, system, battery overvoltage protection
- Battery, converter overcurrent protection
- Charging safety timer
- Safety-Related Certifications:
- IEC 62368-1 CB Certification
The BQ25620 and BQ25622 are highly-integrated 3.5A switch-mode battery charge management and system power path management devices for single cell Li-Ion and Li-polymer batteries. The solution is highly integrated with built-in current sensing, loop compensation, input reverse-blocking FET (RBFET, Q1), high-side switching FET (HSFET, Q2), low-side switching FET (LSFET, Q3), and battery FET (BATFET, Q4) between system and battery. The devices use narrow VDC power path management, regulating the system slightly above the battery voltage without dropping below a configurable minimum system voltage. The low impedance power path optimizes switch-mode operation efficiency, reduces battery charging time, extends battery life during discharging phase, and the ultra-low 0.15µA ship mode current extends battery shelf life. The I2C serial interface with charging and system settings makes the BQ25620 and BQ25622 truly flexible solutions.
The BQ25620 supports a wide range of input sources, including standard USB host port, USB charging port, and USB compliant high voltage adapter. It sets the default input current limit based on the built-in D+/D- USB adapter detection interface. BQ25622 has an ILIM pin to set the default input current limit and a TS_BIAS pin for controlled thermistor bias. The device is compliant with USB 2.0 and USB 3.0 power specifications for input current and voltage regulation and meets USB On-the-Go (OTG) operation power rating specification with constant current limit up to 2.4A.
The power path management regulates the system slightly above battery voltage but does not drop below the programmable minimum system voltage. With this feature, the system maintains operation even when the battery is completely depleted or removed. When the input current limit or input voltage limit is reached, the power path management automatically reduces the charge current. As the system load continues to increase, the battery starts to discharge until the system power requirement is met. This supplement mode prevents overloading the input source.
The BQ25620 and BQ25622 initiate and complete a charging cycle without host control. By sensing the battery voltage, it charges the battery in four different phases: trickle charge, pre-charge, constant current (CC) charge, and constant voltage (CV) charge. At the end of the charging cycle, the charger automatically terminates when the charge current is below a preset threshold and the battery voltage is higher than the recharge threshold. Termination is supported for all TS pin temperature zones.
The BQ25620 and BQ25622 provide various safety features for battery charging and system operations, including battery negative temperature coefficient thermistor monitoring, charging safety timer, and overvoltage and overcurrent protections. The thermal regulation reduces charge current when the junction temperature exceeds the programmable threshold. The STAT output reports the charging status and any fault conditions. Other safety features include battery temperature sensing for charge mode and OTG boost mode, thermal shutdown and input UVLO and overvoltage protection. The PG output indicates if a good power source is present. The INT output notifies the host when a fault occurs or status changes.
The BQ25620 and BQ25622 are available in a 18-pin, 2.5mm × 3.0mm 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 | BQ25620 /BQ25622 I2 C Controlled 1-Cell, 3.5A, Maximum 18V Input, Buck Battery Charger with NVDC Power Path Management and OTG Output データシート (Rev. D) | PDF | HTML | 2025年 2月 11日 | ||
アプリケーション・ノート | LiFePO4 Design Considerations | PDF | HTML | 2023年 7月 26日 | |||
Analog Design Journal | パワー・パス搭載バッテリ充電器の採用でアプリケーションを最適化 | PDF | HTML | 英語版 | PDF | HTML | 2023年 6月 19日 | |
Analog Design Journal | 以電源路徑電池充電器將應用最佳化 | PDF | HTML | 2023年 6月 19日 | |||
アプリケーション・ノート | Selection of Single-Cell Buck Narrow VDC Switching Battery Chargers | PDF | HTML | 2022年 11月 10日 | |||
EVM ユーザー ガイド (英語) | BQ25620EVM User's Guide (Rev. A) | PDF | HTML | 2022年 11月 2日 | |||
証明書 | BQ25620EVM EU RoHS Declaration of Conformity (DoC) | 2022年 10月 25日 |
設計および開発
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。
BQ25620EVM — BQ25620 I²C 制御、18V 入力、シングル・セル、3.5A 降圧バッテリ・チャージャの評価基板
BMS050 評価基板 (EVM) は、最大 18V の入力に対応する I²C 制御の 3.5A シングル・セル (1S) NVDC チャージャである BQ25620 を評価するためのチャージャ・モジュールです。
パッケージ | ピン数 | CAD シンボル、フットプリント、および 3D モデル |
---|---|---|
WQFN-HR (RYK) | 18 | Ultra Librarian |
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
- 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
- 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。