Single-chip combines power optimization, conversion for solar

Single-chip combines power optimization, conversion for solar

The SPV1020 is presented as the industry’s first IC to combine power-optimization and power-conversion functions for solar generators. It targets multipanel arrays, from domestic rooftop-type equipment to large installations. The chip allows maximum power-point tracking (MPPT) to be applied individually for each panel. It automatically adjusts a solar generator’s output circuitry to compensate for power fluctuations resulting from varying solar intensity, shadowing, temperature change, panel mismatch, or ageing.

The IC enables distributed MPPT, compensating each panel individually, in contrast to a centralized MPPT scheme that applies a best-fit compensation to all the panels in the array. The chip maximizes the power extracted from each panel regardless of adjacent module performance. It replaces a network with a single chip and also integrates the dc/dc converter to step-up the panel’s low-voltage dc output to a larger dc voltage to produce line-quality ac power. (Engineering samples and evaluation kits available now; volume production scheduled for November 2010; projected price $5 ea/1,000.)

STMicroelectronics , Lexington , MA
Information 781-861-2650
http://www.st.com