BQ25505
- Ultra
Low-Power With High-Efficiency DC-DC Boost Charger
- Cold-Start Voltage: VIN ≥ 600 mV
- Continuous Energy Harvesting From Input Sources as Low as 100 mV
- Ultra-Low Quiescent Current of 325 nA
- Input Voltage Regulation Prevents Collapsing High-Impedance Input Sources
- Ship Mode With < 5 nA From Battery
- Energy
Storage
- Energy can be Stored to Rechargeable Li-Ion Batteries, Thin-Film Batteries, Super-Capacitors, or Conventional Capacitors
- Battery Charging and Protection
- Internally Set Undervoltage Level
- User-Programmable Overvoltage Level
- Battery-Good Output
Flag
- Programmable Threshold and Hysteresis
- Warn Attached Microcontrollers of Pending Loss of Power
- Can be Used to Enable or Disable System Loads
- Programmable Maximum Power Point
Tracking (MPPT)
- Integrated MPPT for Optimal Energy Extraction From a Variety of Energy Harvesters
- Gate Drivers for Primary
(Nonrechargeable) and Secondary (Rechargeable) Storage Element
Multiplexing
- Autonomous Switching Based on VBAT_OK
- Break-Before-Make Prevents System Rail Droop
The bq25505 device is specifically designed to efficiently extract the microwatts (µW) to miliwatts (mW) of power generated from a variety of DC energy harvesting, high-impedance sources like photovoltaic (solar) or thermal electric generators (TEGs) without collapsing those sources. The battery-management features of the bq25505 ensure that a secondary rechargeable battery is not overcharged by this extracted power, with voltage boosted, nor depleted beyond safe limits by a system load. The integrated multiplexer gate drivers autonomously switch the system load to a primary nonrechargeable battery if the secondary battery voltage falls below the user-defined VBAT_OK threshold.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | bq25505 ultra low-power boost charger with battery management and autonomous power multiplexer for primary battery in energy harvester applications datasheet (Rev. F) | PDF | HTML | 2019/3/6 | ||
| 技術文章 | Experience seamless shopping thanks to electronic shelf labels | PDF | HTML | 2018/10/10 | |||
| 技術文章 | How energy harvesting can extend the life of your fault indicator on the grid | PDF | HTML | 2017/10/18 | |||
| 白皮書 | Cities grow smarter through innovative semiconductor technologies | 2017/7/7 | ||||
| 使用指南 | User's Guide for bq25505 Battery Charger Evaluation Module for Energy Harvesting (Rev. A) | 2014/8/23 | ||||
| Product overview | Battery Management Solutions for Wearable and Fitness Devices (Rev. C) | 2014/8/18 | ||||
| 類比設計期刊 | Accurately measuring efficiency of ultralow-IQ devices | 2014/1/22 | ||||
| Product overview | Industry’s Most Efficient Nano Power Harvesting Solutions (Rev. A) | 2013/11/8 |
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)。
SLUC463 — Solar App Design Example V1.3, bq25505
SLUC484 — bq25505/70 Design Help V1.3
TIDA-00100 — 適用於低功耗藍牙 (BLE) 信標子系統的室內光線能源採集參考設計
適用於藍牙低功耗 (BLE) 信標子系統的室內光線能量採集參考設計提供了一個解決方案，其中只需零售環境（大於 250LUX）中的一般室內照明功率，藍牙低功耗晶片即可廣播 BLE 信標。
此子系統參考設計與現有解決方案高度差異化，因為它無需電池，因此可免除更換電池、電池充電的麻煩，並節省電池維護相關成本。 此解決方案還可確保只要有典型的室內照明，安裝不會受到任何限制。 也沒有開/關開關；整個負載連接和斷開連接由電源管理 IC 處理，從而確保解決方案可以自我管理。
TIDA-00488 — 適用於 Sub-1GHz 網路的能源採集環境光和環境感測器節點參考設計
TIDA-00488 展示了一種利用日光能源收集進行無線環境感測的超低功耗、可再生方法，並具有較長的備用電池壽命。此參考設計運用我們的超低功耗採集器電源管理 SimpleLink™ 超低功耗 sub-1 GHz 無線微控制器 (MCU) 平台，以及環境光、濕度和溫度感測技術，可在能量採集電路處於活動狀態時進行持續監測，並在使用備用電池運行時中斷監測。
TIDA-00998 — 適用於高架故障指示燈的能源採集和故障指示燈子系統參考設計
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN (RGR) | 20 | Ultra Librarian |
訂購與品質
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。