[原创] 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..

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