BQ25672
- High power density, high integration buck charger for 1-4 cell batteries
- Integrates switching MOSFETs, BATFET
- Integrates input and charging current sensing
- Highly efficient
- 750-kHz or 1.5-MHz switching frequencies
- 3-A charging current with 10-mA resolution
- 96.5% efficient: 16-V battery at 3A from 20V
- Supports a wide range of input sources
- Autonomously sampled open circuit voltage (V OC) maximum power point tracking (MPPT) for charging from a photovoltaic panel
- 3.6-V to 24-V wide input operating voltage range with 30-V absolute maximum rating
- Maximum power tracking with input voltage dynamic power management (VINDPM) up to 22 V and input current dynamic power management (IINDPM) up to 3.3 A
- Detects USB BC1.2, HVDCP and non-standard adapters
- Dual-input power mux controller (optional) for source selection
- Narrow voltage DC (NVDC) power path
- Powers USB port from battery (USB OTG)
- 5-V to 12-V OTG buck-boost output voltage with 10-mV resolution
- OTG output current regulation up to 2 A with 40-mA resolution
- Flexible autonomous and I 2C mode for optimal system performance
- Integrated 16-bit ADC for voltage, current, and temperature monitoring
- Low battery quiescent current
- 17 µA for battery only operation
- 500 nA in Charger Shutdown Mode
- High accuracy
- -0.25% to +0.65% charge voltage regulation for 2S batteries
- ±5% charge current regulation
- ±5% input current regulation
- Safety
- Thermal regulation and thermal shutdown
- Input/battery OVP and OCP
- Converter MOSFETs OCP
- Charging safety timer
- Package
- 29-Pin 4 mm × 4 mm QFN
The BQ25672 is a fully integrated switch-mode buck charger for 1-4 cell Li-ion batteries and Li-polymer batteries. The BQ25672 is also capable of producing a buck-boost, 5 V to 12 V, output voltage on VBUS when operating in OTG Mode. The integration includes the switching MOSFETs, input and charging current sensing circuits, the battery FET and all the loop compensation of the converter. It uses NVDC power path management, regulating the system not dropping below a configurable minimum system voltage. When system power exceeds the input source rating, battery supplement mode supports the system without overloading the input source. also maximizes power from photovoltaic panels using its built-in V OC scaling MPPT algorithm.
技術文件
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檢視所有 5 | 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | BQ25672 I2C Controlled, 1- to 4-Cell, 3-A Buck Battery Charger with Dual-Input Selector, MPPT for Solar Panels and Integrated ADC datasheet (Rev. B) | PDF | HTML | 2023年 7月 26日 |
| Application note | Increasing NVCD Battery Chargers' Discharge Current | PDF | HTML | 2024年 1月 10日 | |
| Application note | State of Charge Estimation Using Smart Battery Charger | PDF | HTML | 2021年 10月 11日 | |
| User guide | BQ25672 Evaluation Module (Rev. A) | PDF | HTML | 2021年 10月 1日 | |
| Certificate | BQ25672EVM EU RoHS Declaration of Conformity (DoC) | 2020年 12月 28日 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
開發板
BQ25672EVM — 適用 I²C 控制、1 至 4 芯、3-A 降壓充電器與雙輸入和 MPPT 的 BQ25672 評估模組
BQ25672EVM 評估模組 (EVM) 可用於評估 BQ25672 裝置。BQ25672 是採用 HOTROD (QFN) 封裝的整合式切換模式降壓電池充電管理裝置，適用於 6-V 至 24-V 輸入的 1 串聯至 4 串聯電池芯鋰離子和鋰聚合物電池，並具備可編程的 750-KHz 及 1500-KHz 切換頻率。具有充電和系統設定功能的 I2C 序列介面使此裝置成為真正靈活的解決方案。
應用軟體及架構
TI-CHARGER-GUI — 適於與 USB2ANY 和電池充電搭配使用的 GUI 軟體評估模組
TI-CHARGER-GUI 提供網路型或獨立式圖形使用者介面，協助評估、設計、配置或測試電池充電器產品。該軟體提供暫存器的完整存取權，以及用於傳送及排序指令的簡易介面。
| 封裝 | 引腳 | 下載 |
|---|---|---|
| VQFN-HR (RQM) | 29 | 檢視選項 |
訂購與品質
內含資訊：
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 資格摘要
- 進行中可靠性監測
內含資訊：
- 晶圓廠位置
- 組裝地點
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。