STMicroelectronics STNRGPF12 power-factor controller

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Combining the flexibility of digital power with the responsiveness of analog algorithms, STMicroelectronics’ STNRGPF12 dual-channel interleaved boost-PFC controller is easily configured and optimised using the company’s eDesignSuite software.

Suited to applications over 600 W, the product is designed to enhance efficiency in equipment as diverse as industrial motor controls, charging stations, uninterruptible power supplies, 4G and 5G base stations, welding machines, telecom switches, home appliances and data-centre power supplies.

The device operates in continuous-conduction mode (CCM) at fixed frequency with average-current-mode control. The inner current loop utilises a hardware analog proportional-integral (PI) compensator, while the outer voltage loop is performed by a digital PI controller with fast dynamic response. This enables the product to manage cascaded control of the voltage and current loops to regulate the output voltage by acting on the total average inductor current.

Rich feature integration includes digital inrush-current limiting, which leverages silicon controlled rectifiers (SCR) in the high-side switching circuitry to facilitate soft-start management and enhance system robustness. The unit also supports load feed-forward, current balancing, phase shedding and fan control. An integrated UART allows access to non-volatile memory for user configuration of PFC parameters to meet specific application needs and permits monitoring of parameters in the field.

Users can unleash the potential of the product by taking advantage of ST’s extensive ecosystem, which includes the STEVAL-IPFC12V1 dual-channel 2 kW interleaved PFC reference design, as well as the configuration software, to jumpstart their designs.

For more information: www.st.com/stnrgpf12-pr.