Texas Instruments

bq25505 PMICs with Boost Charger and Autonomous Power Multiplexor

Texas Instruments offers its bq25505, ultra-low power harvester PMICs with boost charger and autonomous power multiplexor for the primary battery in energy harvester applications

Image of Texas Instruments' bq25505 PMICs with Boost Charger and Autonomous Power Multiplexor Texas Instruments' bq25505 devices are specifically designed to efficiently extract the microwatts (µW) to miliwatts (mW) of power generated from a variety of DC energy harvesting, high-impedance sources without collapsing them. These sources include photovoltaic (solar) or thermal electric generators (TEGs). The battery-management features of the bq25505 ensure that a secondary rechargeable battery is not overcharged by this extracted power, with voltage boosted nor depleted beyond safe limits by a system load. The integrated multiplexer gate drivers autonomously switch the system load to a primary, non-rechargeable battery if the secondary battery voltage falls below the user-defined VBAT_OK threshold.

Features
  • Ultra-low-power with high-efficiency DC-DC boost charger
    • Cold-start voltage: VIN ≥ 330 mV
    • Continuous energy harvesting from input sources as low as 100 mV
    • Ultra-low quiescent current of 325 nA
    • Input voltage regulation prevents collapsing high-impedance input sources
    • 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 level

bq25505 PMICs with Boost Charger and Autonomous Power Multiplexor

ImageManufacturer Part NumberDescriptionVoltage - SupplyOperating TemperatureAvailable QuantityPriceView Details
IC ENERGY HARV CTRLR BATT 20VQFNBQ25505RGRRIC ENERGY HARV CTRLR BATT 20VQFN0.12V ~ 4V-40°C ~ 85°C4977 - Immediate$8.65View Details
IC ENERGY HARV CTRLR BATT 20VQFNBQ25505RGRTIC ENERGY HARV CTRLR BATT 20VQFN0.12V ~ 4V-40°C ~ 85°C192 - Immediate$10.20View Details

Evaluation Board

ImageManufacturer Part NumberDescriptionFunctionUtilized IC / PartAvailable QuantityPriceView Details
EVAL BOARD FOR BQ25505BQ25505EVM-218EVAL BOARD FOR BQ25505Energy HarvestingBQ255050 - Immediate$99.20View Details
Published: 2016-06-08

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