Codebeispiel oder Demo
BQ25505
Power-Management-IC für Harvester mit extrem geringem Stromverbrauch, Aufwärtslader und autonomem Po
Datenblatt
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.
Technische Dokumentation
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Alle anzeigen 8 | Typ | Titel | Datum | ||
|---|---|---|---|---|
| * | 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 | 06 Mär 2019 |
| Technical article | Experience seamless shopping thanks to electronic shelf labels | PDF | HTML | 10 Okt 2018 | |
| Technical article | How energy harvesting can extend the life of your fault indicator on the grid | PDF | HTML | 18 Okt 2017 | |
| White paper | Cities grow smarter through innovative semiconductor technologies | 07 Jul 2017 | ||
| User guide | User's Guide for bq25505 Battery Charger Evaluation Module for Energy Harvesting (Rev. A) | 23 Aug 2014 | ||
| Product overview | Battery Management Solutions for Wearable and Fitness Devices (Rev. C) | 18 Aug 2014 | ||
| Analog Design Journal | Accurately measuring efficiency of ultralow-IQ devices | 22 Jan 2014 | ||
| Product overview | Industry’s Most Efficient Nano Power Harvesting Solutions (Rev. A) | 08 Nov 2013 |
Design und Entwicklung
Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.
Berechnungstool
SLUC484 — bq25505/70 Design Help V1.3
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| Gehäuse | Pins | CAD-Symbole, Footprints und 3D-Modelle |
|---|---|---|
| VQFN (RGR) | 20 | Ultra Librarian |
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