bq25505 Ultra Low Power Harvester Power Management IC with Boost Charger Evaluation Module BQ25505EVM-218 (ACTIVE)

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The bq25505 evaluation module (EVM) is a complete module for evaluating the bq25505 energy harvesting charger for storage elements like single-cell LiIon/Polymer batteries or super-capacitors. Intended to be powered by high impedance supplies, such as solar panels, thermo-electric generators (TEGs) or piezoelectric generators, the bq25505 regulates its input voltage so that it will not collapse its input source while charging the storage element up to a set voltage point. A power good output indicates when the charger output reaches a user set level. The bq25505 has an integrated multiplexor that switches the system power between a primary (typically non-rechargeable) battery and secondary (typically rechargeable) battery or supercapacitor based on the power good signal. With minimal changes, the EVM can also be configured as an ultra-low power boost converter, regulating the output voltage from a low impedance source.

  • Programmable input voltage regulation setting via jumpers or resistors
  • Programmable output voltage maximum setting via resistors (currently 4.2V)
  • Programmable power good (BAT_OK) voltage setting via resistors (currently 3.0V)
  • Multiple connectors and test points available

Related Terms:

  • Efficiency Boost Converter Charger

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bq25505 Ultra Low Power Harvester Power Management IC with Boost Charger Evaluation Module


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Technical Documents
User guides (1)
Title Type Size (KB) Date
PDF 1029 23 Aug 2014
More literature (2)
Title Type Size (KB) Date
PDF 38 02 Jan 2019
PDF 161 18 Aug 2014

Software (1)

TI Devices (1)

Part Number Name Product Family
BQ25505  Ultra low power harvester power management IC with boost charger, and autonomous power multiplexor  Battery management 

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