The CS1501 and CS1601 from Cirrus Logic are digitally controlled, variable frequency discontinuous conduction mode (VF-DCM), active power factor correction (PFC) ICs intended for use in switch-mode power supplies rated up to 300 watts. The CS1501 is designed to address power supplies, such as laptop adapters, digital TVs and PC power, while the CS1601 targets lighting applications, such as LED and fluorescent electronic lighting ballasts.
The CS1501 and CS1601 feature Cirrus Logic’s EXL Core architecture with 70 digital algorithm technologies in power management and energy control, designed to solve the complex system level challenges that face power supply designers. Through its digital noise shaping technology, both the CS1501and CS1601 offer best-in-class THD, power factor, and efficiency across all load conditions, while reducing the size and number of required external components.
The CS1501/CS1601 offer an industry standard pinout to ensure an easy upgrade path from legacy analog solutions.
About power factor correction
Power factor correction is required in many electronic applications as global regulations are driving to improve overall efficiency of the utility grid. Traditional analog PFC controllers are nearing the end of their capabilities to meet increasingly strict global regulatory requirements and standards, and new digital solutions enable continued performance and feature improvements designed to meet future market demands.
David Patterson, known for his pioneering research that led to RAID, clusters and more, is part of a team at UC Berkeley that recently made its RISC-V processor architecture an open source hardware offering. We talk with Patterson and one of his colleagues behind the effort about the opportunities they see, what new kinds of designs they hope to enable and what it means for today’s commercial processor giants such as Intel, ARM and Imagination Technologies.