Digital Power Controller STNRGPF02
With average current mode control function
CCM operation at a fixed frequency


STMicroelectronics expanded its digital power supply controller portfolio on the 14th by releasing the STNRGPF02, which supports a 2-channel interleaved Boost-PFC topology.

STNRGPF02 enables the realization of the advantages of digital power supplies in applications ranging from 600W to 6kW, such as higher flexibility and faster design cycles compared to general analog methods. At the same time, it features a higher system integration density than other digital solutions, eliminating the need for a separate DSP or MCU.

STNRGPF02 operates in Continuous-Conduction Mode (CCM) at a fixed frequency using average current mode control. It ensures a high-speed response by incorporating a hardware analog Proportional-Integral (PI) compensator in the internal current loop and a digital PI controller in the external voltage loop. The cascade control function for the voltage and current loops regulates the output voltage by adjusting the total average inductor current.

The new controller is designed to enable mechanical inrush current control using external relays or TRIACs and was released alongside the STNRGPF12, which features digital inrush current control capabilities.

Both controllers support burst mode, programmable phase shedding, and load feedforward to maximize energy efficiency. In addition, they feature built-in protection functions such as programmable high-speed operation thermal protection, overcurrent protection (OCP), overvoltage protection (OVP), and soft start management. PFC error and PFC OK status indicators are also provided.

Engineers can easily configure the STNRGPF02 using eDesignSuite. This tool generates the complete schematic, Bill of Materials (BOM), and binary object code that can be downloaded as firmware via the IC's serial port, significantly reducing the design cycle for general power supplies. PFC parameters can also be monitored via the serial port.

The STEVAL-IPFC02V1, an evaluation board for the STNRGPF02, is also currently available for purchase. The board features a PFC reference design that combines analog cycle-by-cycle current regulation with flexible digital control.

STNRGPF02, suitable for industrial motors, air conditioners, household and commercial appliances, telecommunications infrastructure, data center equipment, and uninterruptible power supplies (UPS), is currently in mass production in TSSOP38 packages, and the price is $2.67 per unit based on a purchase of 1,000 units.