BQ25570参考设计电路|降压转换器应用电路

BQ25570是一款高集成能量采集毫微功耗管理解决方案，此解决方案非常适合于满足超低功耗应用的特别需要。此篇主要介绍了BQ25570特性、应用范围、参考设计电路以及电路分析，帮助大家缩短设计时间。

BQ25570特性：超低功耗直流/直流升压充电器；电池充电和保护；电池正常输出标志；可编程降压调节输出（降压）

BQ25570典型应用范围：太阳能充电器；低功耗无线监测；环境监测；便携式和可佩戴式健康器件

BQ25570参考设计应用电路：

图1BQ25570内部结构图

Thebq25570 device is a highly integrated energy harvesting Nano-Power management solution that is well suited for meeting the special needs of ultra low-power applications. The product is specifically designed to efficiently acquire and manage the microwatts (µW) to milliwatts (mW) of power generated from a variety of DC sources like photovoltaic (solar) or thermal electric generators.

图2BQ25570参考设计图

Thebq25570 also implements a programmable maximum power point tracking sampling network to optimize the transfer of power into the device. The fraction of open circuit voltage that is sampled and held can be controlled by pulling VOC_SAMP high or low (80% or 50% respectively) or by using external resistors.

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