TI TIDA－00998超低功耗能量收获和电源管理参考设计

TI公司的TIDA-00998是采用bq25505超低功耗升压充电器的超低功耗能量收获和电源管理参考设计.太阳能收获能对锂电池充电,能在初级非充电和次级可充电间自动切换,用来给LED驱动器和TIDA-00807供电,能驱动多达六个单独的LED.本文介绍了bq25505主要特性和框图,应用电路,以及能量收获参考设计TIDA-00998主要特性,框图,主要系统指标和电路图,材料清单和PCB设计图.
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.
bq25505主要特性:
Ultra Low-Power With High-Efficiency DC-DC Boost Charger
Cold-Start Voltage: VIN ≥ 330 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 (Nonrechar...