Motion-SPM eases inverter motor drive designs

Expanding its Smart Power Modules (SPM) portfolio, Fairchild Semiconductor has introduced three new Motion-SPM devices available in 29-by-12mm SMD packages—the FSB50325S (250V), FSB50250S (500V) and FSB50450S (500V).

According to the company, the Motion-SPM in SMD enables designers to achieve the highest levels of energy efficiency, compactness and low EMI required by small (50-125W) inverter motor drive applications such as water pumps, dishwasher motors and fan motors. The high integration level and advanced packaging of these modules simplify designs, speed time to market and reduce total system cost, the company said.

"Designers of dishwasher inverter motors must contend with stringent energy-efficiency requirements as well as limited PCB board space," said Taehoon Kim, VP of Fairchild's functional power group. "Fairchild's new Motion-SPM in SMD packaging improves system power efficiency by providing a high isolation voltage rating of 1500Vrms for one minute and excellent thermal resistance. In addition, their ultrasmall-footprint package is ideally suited for these space-constrained applications; and because these are surface-mount devices, they further reduce space and ease design complexity by allowing the designer to utilize the backside of the PCB where the module is mounted. Additionally, the SMD-packaged Motion-SPM allows PCB manufacturers to use standard automated assembly line processes to speed design cycle time and reduce manufacturing costs."

System ruggedness
Each Motion-SPM integrates six fast-recovery MOSFETs (FRFET) and three half-bridge high-voltage ICs (HVIC) into one thermally efficient package. Using the company's innovative technologies, these integrated components result in low-loss and low EMI characteristics that improve efficiency and reliability in the application. By employing a MOSFET as the device's power switch, the Motion-SPM also provides better system ruggedness and a larger safe operating area (SOA) than either IGBT-based power modules or one-chip solutions. Compared to discrete approaches, Fairchild said these highly integrated modules not only offer significant space savings, they also eliminate the time-consuming task of testing and qualifying multiple discrete components.

Designers have the option to choose the most appropriate package: an SMD or Tiny-DIP. This packaging flexibility allows designers to choose the right device for their specific motor application requirements.

These Pb-free devices meet or exceed the requirements of the joint IPC/JEDEC standard J-STD-020C and are compliant with EU regulations now in effect. They are currently available and priced at $6.60 for FSB50325S, $7.20 for FSB50250S and $7.80 for FSB50450S. Delivery is 12 weeks ARO.