STEVAL-IPFC12V1

STEVAL-IPFC12V1 is a 2kW 2-ch interleaved PFC reference design based on STNRGPF12 digital controller with digital inrush current control. This design features performance of analogue cycle-by-cycle current regulation and flexibility of digital control to generate sinusoidal supplies with very high power factor and very low harmonic distortion. Digital power control is based on STNRGPF12 digital PFC controller, which in combination with TN3050H-12WY thyristor implements digital inrush current limitation and can drive up to two interleaved PFC channels using mixed signal (analogue and digital) average current mode control in CCM at fixed frequency. This reference design consists of power board with 2-ch interleaved CCM boost power stage, I/P rectifier controlled bridge and auxiliary power supply, a control board with embedded STNRGPF12 digital controller and analogue control circuitry and USB to UART (not included in kit) bridge for programming the STNRGPF12 and performance monitoring.

• Input voltage range: 90 to 265V AC and line frequency range: 47 to 63Hz
• Maximum output power is 2kW at 230V and 400V output voltage
• Digital inrush current limiter function performed with SCR
• Power factor greater than 0.98 at 20% load and total harmonic distortion: less than 5% at 20% load
• Mixed-signal average current mode control, CCM fixed frequency operation
• 60kHz switching frequency (fsw), phase shedding and current balance
• Cycle-by-cycle regulation (analogue current control loop)
• Input voltage and load feed-forwards, burst-mode operation
• Overvoltage protection and overcurrent protection
• Thermal protection, status indicator LEDs and cooling function