PFC Module Implements PSC Circuit Topology
Fairchild Semiconductor introduces a Power Factor Correction (PFC) Smart Power Module (SPM) to implement the Partial Power Factor Correction Switching Converter (PSC) circuit topology. By triggering the IGBTs at every half cycle of the line current, the PFC-SPM FSAB20PH60 provides 97% of power factor (typical) and full compliance with the mandatory PFC standard IEC61000-3-2. The PFC-SPM enables simpler designs by combining four rectifier diodes, two IGBTs, a gate-driving IC and a thermistor in a single, thermally efficient module. The two modules are designed to be mounted side-by-side to share a single heat sink thus simplifying designs, speeding assembly and improving overall system reliability. The PFC-SPM's application benefits include: low thermal resistance (Rth(j-c)Q = 2.8°C/W for IGBT; Rth(j-c)Q = 2.6° C/W for diode) with the aid of DBC substrate; and low acoustic noise due to an optimized gate-driving IC.