TI公司的BQ25504是一款最新集成纳米智能能源收集电源管理办理方案，本方案非常适合有特殊需要的超低功耗的应用情况。该产物是专门设计来有效地获取和管理微瓦和毫瓦的电力，电力通常来自各种光伏太阳能直流源或热电动发电机。BQ25504是第一种面向产物和系统实现高效的执行转换器或充电器，比方应用在对操纵功耗有严格的需求无线电传感器网络。接纳BQ25504设计的DC-DC升压转换器/充电器，只需要毫瓦的电力就可以工作。本京电港论坛文章通过总结BQ25504器件的特点，先容器件、特点、应用方向及内部布局框架图，并给参考方案实例原理图、制板图及元器件清单。
The bq25504 is the first of a new family of intelligent integrated energy harvesting Nano-Power management solutions that are 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 miliwatts (mW) of power generated from a variety of DC sources like photovoltaic (solar) or thermal electric generators. The bq25504 is the first device of its kind to implement a highly efficient boost converter/charger targeted toward products and systems, such as wireless sensor networks (WSN) which have stringent power and operational demands. The design of the bq25504 starts with a DCDC boost converter/charger that requires only microwatts of power to begin operating.
BQ25504主要特点：
Ultra Low Power With High Efficiency DC/DC Boost Converter/Charger
C Continuous Energy Harvesting From Low Input Sources: VIN ≥ 80 mV(Typical)Ultra Low Quiescent Current: IQ < 330 nA (Typical)
C Cold-Start Voltage: VIN ≥ 330 mV (Typical)Programmable Dynamic Maximum Power Point Tracking (MPPT)
C Integrated Dynamic Maximum Power Point Tracking for Optimal Energy Extraction From a Variety of Energy Generation Sources Input Voltage Regulation Prevents Collapsing Input Source Energy Storage
C Energy can be Stored to Re-Chargeable Li-ion Batteries, Thin-film Batteries, Super-Capacitors, or Conventional Capacitors Battery Charging and Protection
C User Programmable Undervoltage and Overvoltage Levels
C On-Chip Temperature Sensor with Programmable Overtemperature Shutoff Battery Status Output
C Battery Good Output Pin
C Programmable Threshold and Hysteresis
C Warn Attached Microcontrollers of Pending Loss of Power
C Can be Used to Enable/Disable System Loads
BQ25504应用：
• Energy Harvesting
• Solar Charger
• Thermal Electric Sources Generator (TEG) Harvesting
• Wireless Sensor Networks (WSN)
• Industrial Monitoring
• Environmental Monitoring
• Bridge and Structural Health Monitoring (SHM)
• Smart Building Controls
• Portable and Wearable Health Devices
• Entertainment System Remote Controls
图1{京电港论坛}. BQ25504方框架图
BQ25504参考方案主要特点：
• Evaluation module for bq25504
• Ultra low power boost converter/charger with battery management for energy harvester applications
• Resistor-programmable settings for under voltage, over voltage providing flexible battery management;
POTs Included for fine tuning the settings (not populated)
• Programmable push-pull output Indicator for battery status (VBAT_OK)
• Test points for key signals available for testing purpose C easy probe hook-up.
• Jumpers available C easy to change settings
BQ25504设计原理图：
图2{京电港论坛}. BQ25504设计原理图
BQ25504设计方案质料清单：
PCB线路板元件结构图：
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