Solar Power Energy Harvester Reference Design Using a Super Cap
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This reference design is a solar charger and energy harvester using a highly integrated power management solution that is well-suited for ultra-low power applications. The product is specifically designed to efficiently acquire and manage the microwatts (μW) to milliwatts (mW) needed to power your design. The storage method is a 47nF super capacitor that is charged and maintained by 4 series low power solar elements using  MPPT (maximum power point tracking) .

  • MPPT (maximum power point tracking) provides optimal energy extraction from solar panels
  • Internal battery charging and protection cicruits
  • Input voltage regulation prevents collapsing high impedance input sources (boost)
  • Programmable step-down regulated output (buck)
  • Energy is stored in a super capacitor, for use in a low power application
  • This design is a complete solution, including the solar current source, charge management solution, super cap and a built-in LDO regulator

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Schematic/Block Diagram

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Design Files

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TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
BQ25570  Ultra Low power Harvester power Management IC with boost charger, and Nanopower Buck Converter  Battery management ICs  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
BQ25570 Download Download

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Technical documentation

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User guide (2)
Title Type Size (KB) Date
PDF 478 05 Jun 2014
PDF 358 05 Jun 2014
Design files (5)
Title Type Size (KB) Date
ZIP 1322 05 Jun 2014
ZIP 1322 05 Jun 2014
PDF 308 05 Jun 2014
PDF 61 05 Jun 2014
PDF 144 05 Jun 2014

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