STMicroelectronics STNRGPF01 SMPS controller

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The STNRGPF01 SMPS (switched-mode power supply) controller from STMicroelectronics delivers the flexibility and high efficiency of digital power without the technical challenges and time to develop custom DSP (digital signal processor) code.

The SMPS controller for interleaved boost-PFC topologies is configured quickly and easily using ST’s eDesignSuite online design environment and has I²C and UART interfaces for monitoring and control. It supports three interleaved phases, which ensures low ripple currents, simplifies EMI-filter design using small-size inductors and permits a wide power range from 500 W to over 20 kW. The product’s flexible, configurable phase-shedding strategy optimises the number of active phases automatically to maintain high efficiency across all load conditions.

The unit operates in CCM at fixed frequency with average-current-mode control. A hardware inner-current loop ensures accurate cycle-by-cycle regulation, while a digital proportional-integral (PI) controller manages the outer voltage loop to ensure fast dynamic response. The frequency can be programmed to over 300 kHz to control either an IGBT or MOSFET output stage. Other configurable features include inrush-current limiting and PFC soft power-on.

By delivering the advantages of digital power through easy configuration in eDesignSuite, the controller enables flexibility, safety and energy efficiency in equipment such as industrial welders, motor drives, pumps, uninterruptible power supplies (UPS), industrial or consumer air conditioners, and domestic appliances such as refrigerators, washers, dryers and cookers.

For more information: www.st.com/stnrgpf01.