STMicroelectronics has launched the STNRGPF01 SMPS controller, which provides flexibility and efficiency in digital output for custom DSP code development.

The STNRGPF01 facilitates configuration within ST's online design environment, eDesignSuite, and enables monitoring and control via I2C and UART interfaces. It supports 3-phase interleaving to control ripple current to a low level and simplifies EMI filter design using a compact inductor. Additionally, it supports a wide output range from 500W to over 20kW and can efficiently maintain multiple active phases under various load conditions by automatically optimizing them using phase shedding techniques.

Average current mode control operates as CCM at a fixed frequency. While the digital PI controller controls the external voltage loop to produce a fast dynamic response, the internal hardware current loop focuses on maintaining precise cycle rules. The frequency can be programmed at 300 kHz or higher for controlling the IGBT or MOSFET output stage. Other components include an inrush current limiter and PFC soft power-on.

Thanks to digital outputs that are easily configured in the online design environment eDesignSuite, the STNRGPF01 enables exceptional flexibility, reliability, safety, and energy efficiency in devices such as industrial welding, motor drives, pumps, uninterruptible power supplies (UPS), and industrial or consumer air conditioners, as well as in household electronic devices such as refrigerators, dishwashers, dryers, and cookers.

Running the configurator in the eDesignSuite converter specification automatically generates schematics, Bills of Materials (BoMs), and firmware downloads for IC configuration. There is no need to write code to implement functions required by the DSP or to understand processor memory and interrupt structures, allowing for greater flexibility compared to analog controllers.