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The synthetic current control loop diagram unique to Renesas is shown on this slide. On the left side is the voltage loop, which supports a front-end ADC. This enables the entire loop tuning to take place in the digital domain. The feature that differentiates Renesas' controller loop solution vs. all competing solutions in the market is the implementation of synthetic current on a per phase basis. This patented design ensures a single linear feedback loop that is inherently current controlled. The implementation of a full digital linear loop with zero latency offers tremendous benefits, including a noise free, full bandwidth solution delivering fastest transient response. The zero latency loop response, unique to Renesas, enables power designers to realize lowest total cost of ownership benefits by supporting the lowest output capacitance for any power design. Synthetic current supports cycle-by-cycle calibration and corrects for removal of error due to component aging and thermal. This ensures precise delivery of voltage and current across the full load. Moreover, with only synthetic current entering the loop and implemented on a per phase basis, this allows robust current sharing per phase. So regardless of the load condition, the phase currents are always balanced.
