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.
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檢視所有 8 | 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | 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年 3月 6日 |
| Technical article | Experience seamless shopping thanks to electronic shelf labels | PDF | HTML | 2018年 10月 10日 | |
| Technical article | How energy harvesting can extend the life of your fault indicator on the grid | PDF | HTML | 2017年 10月 18日 | |
| White paper | Cities grow smarter through innovative semiconductor technologies | 2017年 7月 7日 | ||
| User guide | User's Guide for bq25505 Battery Charger Evaluation Module for Energy Harvesting (Rev. A) | 2014年 8月 23日 | ||
| Product overview | Battery Management Solutions for Wearable and Fitness Devices (Rev. C) | 2014年 8月 18日 | ||
| Analog Design Journal | Accurately measuring efficiency of ultralow-IQ devices | 2014年 1月 22日 | ||
| Product overview | Industry’s Most Efficient Nano Power Harvesting Solutions (Rev. A) | 2013年 11月 8日 |
設計與開發
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參考設計
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 demonstrates an ultra-low power and a renewable method of wireless environmental sensing using daylight energy harvesting with a long backup battery life. This reference design uses our ultra-low power harvester power management SimpleLink™ ultra-low power sub-1 GHz wireless (...)
參考設計
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
This reference design shows multiple architectures for extending primary battery life using a secondary battery or supercapacitor with energy harvested from a current transformer (CT) or solar cells. Optimal power management is done using efficient LED drivers to drive series or parallel (...)
參考設計
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
The Indoor Light Energy Harvesting Reference Design for Bluetooth Low Energy (BLE) Beacon Subsystem provides a solution where by with just the power of the typical indoor lighting in a retail environment (greater than 250 LUX) the Bluetooth Low Energy chip can broadcast BLE beacons.
This subsystem (...)
| 封裝 | 引腳 | 下載 |
|---|---|---|
| VQFN (RGR) | 20 | 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
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