The STEVAL-ISV012V1 is a demonstration board that mounts the SPV1040 (solar energy harvester) as the input stage and the L6924D (Li-Ion battery charger) as the output stage. It targets any portable application powered by lithium-ion batteries and merges the capability of the SPV1040 to maximize the power extraction from the solar module with the linear regulation of the L6924D, to optimize the battery charge and to protect the load while reducing the power dissipation at the bottom.
The document details the STEVAL-ISV012V1 demonstration board, a reference design for portable applications powered by lithium-ion batteries. The board integrates the SPV1040 solar energy harvester as the input stage and the L6924D lithium-ion battery charger as the output stage. It utilizes a 400 mW polycrystalline PV panel to maximize power extraction and optimize battery charging while protecting the load.
The note explains the operation of both the SPV1040 and L6924D components, specifically focusing on the L6924D's ability to function as a quasi-pulse charger when powered by the current-limited output of the SPV1040. This configuration significantly reduces power dissipation compared to linear charging modes. The document includes a reference design description, schematics, bill of materials, and layout guidelines.
| Battery Voltage Max | 4.2 V |
|---|---|
| PV Panel Power | 400 mW |
| PV Panel Voltage | 2.2 V |
| PV Panel Current | 220 mA |
It is a demonstration board that mounts the SPV1040 solar harvester and the L6924D battery charger to target portable applications powered by lithium-ion batteries.
It works as a quasi-pulse charger when powered from the current-limited adapter (SPV1040), reducing power dissipation by operating the internal MOSFET in saturation mode.