Ultra Low Power Harvester Power Management IC with Boost Charger, and Nanopower Buck Converter - BQ25570

BQ25570 (ACTIVE)

Ultra Low Power Harvester Power Management IC with Boost Charger, and Nanopower Buck Converter

 

Description

The bq25570 device 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 buck converter for providing a second power rail to systems such as wireless sensor networks (WSN) which have stringent power and operational demands. All the capabilities of bq25570 are packed into a small foot-print 20-lead 3.5-mm × 3.5-mm QFN package (RGR).

Features

  • Ultra Low Power DC-DC Boost Charger
    • 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
  • Energy Storage
    • Energy can be Stored to Re-chargeable
      Li-ion Batteries, Thin-film Batteries, Super-
      capacitors, or Conventional Capacitors
  • Battery Charging and Protection
    • Internally Set Undervoltage Level
    • User Programmable Overvoltage Levels
  • 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 Step Down Regulated Output
    (Buck)
    • High Efficiency up to 93%
    • Supports Peak Output Current up to 110 mA
      (typical)
  • Programmable Maximum Power Point Tracking
    (MPPT)
    • Provides Optimal Energy Extraction From a
      Variety of Energy Harvesters including Solar Panels,
      Thermal and Piezo Electric Generators

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Parametrics Compare all products in Energy Harvesting & Solar Charging

 
Cell Chemistry
Charge Current (Max) (A)
Control Topology
Primary Charge Termination Method
Number of Series Cells
Battery Charge Voltage (V)
Special Features
Operating Temperature Range (C)
Pin/Package
BQ25570
Li-Ion
SuperCap
Lead Acid
LiFePO4
NiMH
Li-Polymer
NiCd   
0.1   
Switch-Mode   
Voltage   
Single Cell   
Adjustable   
Integrated FET
Over Voltage Protection
Solar Input
Under Voltage Protection   
-40 to 125   
20VQFN