ST can be configured with energy efficient interleaved power factor correction controllers to enable digital power technology to benefit more designers

ST's STNRGPF01 Switching Power Supply (SMPS) controller offers the flexibility and energy efficiency of digital power technology without any technical challenges and without the time required to develop custom DSP (Digital Signal Processor) code.

In high power applications above 1 kW or 2 kW, an interleaved CCMPFC (Continuous Current Mode Power Factor Correction) topology must be used to handle this level of power while ensuring proper magnet volume and shunt. In addition, the market's need for more energy-efficient, communication connectivity and configuration options has made designers more inclined to use expensive, complex digital signal processing solutions.

In ST's eDesignSuite online design environment, ST's new interleaved boost PFC topology SMPS controller configuration is fast and simple, with built-in I2C and UART interfaces for monitoring functions. The controller supports three interleaved phases, which ensure low ripple current, and a small inductor simplifies EMI filter design with power ranges from 500W to 20kW. In addition, STNRGPF01 implements a flexible, configurable dephasing strategy that automatically optimizes the number of operating phases to maintain high efficiency under all load conditions.

The working mode of STNRGPF01 is CCM, fixed frequency, and current sharing control. The hardware internal current loop ensures accurate cycle-by-cycle adjustment, while a digital proportional-integral (PI) controller manages the external voltage loop to ensure fast dynamic response. The switching frequency can be set from a few kHz to 300 kHz to control the output stage of the IGBT or MOSFET. Other configurable features include inrush current limiting and PFC soft power-up.

By simply configuring STNRGPF01 in the eDesignSuite environment, you can deliver the benefits of digital power technology for superior flexibility, reliability, safety and energy efficiency, for example, industrial welders, motor drives, pumps, uninterruptible power supplies (UPS) ), industrial or consumer electronic air conditioners, and appliances such as refrigerators, washing machines, clothes dryers and kitchen utensils.

Author：Brittany Antonia （The author of article owns the copyright.）