STEVAL-IPFC02V1 STMicroelectronics

STEVAL-IPFC02V1 Data brief 2 kW two-channel interleaved PFC reference design based on the STNRGPF02 digital controller Features Input voltage range: 90 to 265 V AC Line frequency range: 47 to 63 Hz Maximum output power: 2 kW at 230 V Inrush current limiter Output voltage: 400 V Power factor: > 0.98 at 20% load Total harmonic distortion: <5% at 20% load Mixed-signal average current mode control, CCM fixed frequency operation Switching frequency (fsw): 60 kHz Cycle-by-cycle regulation (analog current control loop) Input voltage and load feed-forwards Phase shedding Current balance Burst-mode operation Overvoltage protection Overcurrent protection Thermal protection Status indicator LEDs Cooling function Product summary 2 kW two-channel Description interleaved PFC based on the STEVAL-IPFC02V1 The STEVAL-IPFC02V1 2 kW interleaved PFC reference design features the STNRGPF02 digital performance of analog cycle-by-cycle current regulation and the flexibility of digital controller control to generate sinusoidal supplies with very high power factor and very low 2 kW two-channel harmonic distortion. interleaved PFC Digital power control is based on the STNRGPF02 digital PFC controller, which can based on the STNRGPF02 drive up to two interleaved PFC channels using mixed signal (analog and digital) STNRGPF02 digital average current mode control in CCM at fixed frequency. controller The 2 kW interleaved PFC reference design consists of a power board with 2-ch trench gate field- STGW20H65FB stop IGBT interleaved CCM boost power stage, auxiliary power supply, a control board with embedded STNRGPF02 digital controller and a small adapter board for programming power Schottky STPSC12065D the STNRGPF02. silicon carbide diode eDesignSuite is the tool available in the ST website to configure the STNRGPF02 PFC Converter - Applications according to specific design requirements for each interleaved PFC. Single Phase Input Digital PFC blog Articles article DB4079 - Rev 2 - January 2021 www.st.com For further information contact your local STMicroelectronics sales office.STEVAL-IPFC02V1 Design overview: 2 kW 2-ch interleaved PFC 1 Design overview: 2 kW 2-ch interleaved PFC The aim of this reference design is to provide a flexible PFC converter that can accept a wide input range (90 to 265 V at 50/60 Hz) for high power applications (higher than 600 W) that require supply power with very high PF and very low THD, in an efficient and cost effective package that can be easily configured for specific performance criteria. The flexibility of programmable digital control and the high performance of analog logic render the STNRGPF02 digital controller the ideal choice, especially designed for interleaved CCM boost PFC applications above 600 watts. The STNRGPF02 implements mixed signal (analog/digital) control, merging the flexibility of high end digital solutions with the performance of analog feedback control. The inner current loop is performed in hardware realizing an analog Proportional-Integral (PI) compensator, ensuring cycle-by-cycle regulation. The outer voltage loop is performed by a digital PI controller . The digital section also includes input voltage and load feedforward for fast transient responses to sudden changes in mains voltage or a load current step occurs. Figure 1. STEVAL-IPFC02V1 block diagram 1. I/O measurement signals 2. Analog circuitry 3. Power stages 4. Digital control section The PFC stage is based on a boost circuit design with two parallel channels to take advantage of the controller s ability to support interleaving through a secondary PWM channel that is phase-shifted 180 with respect to the master channel. While two channels increase circuit complexity, the interleaving operation ensures that there is less ripple and higher apparent switching frequency in the PFC input current, which allow the use of smaller and less expensive input EMI filters, boost inductors and switching devices. The STGW20H65FB IGBTs used for the boost switches are cost effective devices especially designed to minimize losses in power converters thanks to their low V and reduced tail current profile. CE(sat) DB4079 - Rev 2 page 2/9