Smart Power Module Implements Partial Power Factor Correction

Aug 17, 2005 1:29 PM

Fairchild Semiconductor’s Power Factor Correction (PFC) Smart Power Module (SPM) implements the Partial Power Factor Correction Switching Converter (PSC) circuit topology, which is ideal for 1-kW to 3-kW air conditioners. 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, while offering better EMI characteristics than higher-frequency switching topologies.

Compared to alternative discrete solutions, Fairchild’s 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 device's compact (44-mm × 26.8- mm) direct bonded copper (DBC) substrate package is identical in size and configuration to Fairchild's motor control (Motion-SPM) module. The two modules are designed to be mounted side-by-side to share a single heatsink—thus simplifying designs, speeding assembly and improving overall system reliability.

The PFC-SPM's application benefits include very low thermal resistance (Rth(j-c) = 2.8°C/W for each IGBT; Rth(j-c) = 2.6°C/W for each diode) with the aid of the DBC substrate; low acoustic noise due to an optimized gate-driving IC; and 2500 Vrms of isolation. In addition, increased system reliability is provided by the gate-driving IC's undervoltage and overcurrent protection.

The PFC-SPM comes in a lead (Pb)-free Mini-DIP package. Pricing is $13.48 each in quantities of 100.

Acceptable Use Policy blog comments powered by Disqus