BQ25570 Energy Harvester Module

Energy Harvester Module based on BQ25570 Ultra Low Power DC to DC Boost converter

The BQ25570 IC from Texas Instrument is a Nano Power Boost Charger and Buck Converter. This module is based on BQ25570 IC which is specifically designed to efficiently extract microwatts (µW) to milliwatts (mW) of power generated from a variety of high output impedance DC sources like photovoltaic (solar) or thermal electric generators (TEG) without collapsing those sources. The battery management  features ensure that a rechargeable battery is not overcharged by this extracted power, with voltage boosted, or depleted beyond safe limits by a system load. In addition to the highly efficient boosting charger, the bq25570 integrates a highly efficient, nano- power Loads buck converter for providing a second power rail to systems such as wireless sensor networks (WSN) which have stringent power and operational  demands. 

Features Of BQ25570 Energy Harvester Module

• Cold-start Voltage: VIN ≥ 330 mV

• Continuous Energy Harvesting From VIN as low as 100 mV 

• Input Voltage Regulation Prevents Collapsing High Impedance Input Sources 

• Full Operating Quiescent Current of 488 nA (typical) 

• Ship Mode with < 5 nA From Battery

1. Energy Storage 

• Energy can be Stored to Re-chargeable Li-ion Batteries, Thin-film Batteries, Super- 

• capacitors, or Conventional Capacitors

2. Battery Charging and Protection 

• Internally Set Undervoltage Level

• User Programmable Overvoltage Levels

3. 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

4. Programmable Step Down Regulated Output (Buck)

• High Efficiency up to 93%

• Supports Peak Output Current up to 110 mA (typical)

5. Programmable Maximum Power Point Tracking (MPPT)

• Provides Optimal Energy Extraction From a Variety of Energy Harvesters including Solar Panels, Thermal and Piezo Electric Generators

Applications Of BQ25570 Energy Harvester Module

• Energy Harvesting

• Solar Chargers

• Thermal Electric Generator (TEG) Harvesting

• Wireless Sensor Networks (WSN)

• Low Power Wireless Monitoring

• Environmental Monitoring

• Bridge and Structural Health Monitoring (SHM)

• Smart Building Controls

• Portable and Wearable Health Devices

• Entertainment System Remote Controls