Texas Instruments

bq25570 PMICs with Boost Chargers and Nanopower Buck Converters

Texas Instruments offers its bq25570 power management ICs with boost chargers and nanopower buck converters for energy harvester ultra-low powered applications

Image of Texas Instruments' bq25570 Nano Power Boost Chargers and Buck ConvertersTexas Instruments' 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 boost, or depleted beyond safe limits by a system load. In addition to the highly efficient boosting charger, the bq25570 integrates a highly efficient, nanopower 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 x 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 rechargeable 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

Evaluation Board

AfbeeldingOnderdeelnr. fabrikantBeschrijvingFunctieIngebouwdGebruikt IC / onderdeelAvailable QuantityPrijsDetails weergeven
EVAL BOARD FOR BQ25570BQ25570EVM-206EVAL BOARD FOR BQ25570Energie oogstenNeeBQ2557023 - Immediate$102.61Details weergeven
Published: 2016-03-29

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