Power Electronics

Product Showcase

SMT Current Sense Transformers

Ideal for dc-dc converter applications in telephone switches, routers, bridges, and hubs, the CT319 and CT320 current sense transformers feature a profile of 0.16 in. and 0.394 in., respectively. Operating over a range of -55°C to +155°C, they're compatible with high-speed automated pick-and-place assembly and are available in tube and tape-and-reel packaging. CT319 offers turns ratios from 1:20 to 1:200, performing at frequencies of 100 kHz and above. CT320 primary is rated for 35AacVrms and offers turns ratios from 1:20 to 1:200, performing at frequencies of 50 kHz and above.
Datatronic Distribution Inc., Romoland, Calif.
Circle 351 freeproductinfo.net/pet

New Precision Current Sense Resistors

PCS-3 and PCS-100 resistors have a 4-terminal Kelvin connector and offer very low ohmic values, beginning at 1mΩ. Resistance tolerances for both designs are at 1%, 2%, and 5%. With a compact design, these resistors are ideal for many current monitoring and controls applications. The PCS-3 has a power rating of 3W at 70°C, maximum 40A permanent load. Standard resistance values available are 1mΩ to 1Ω. Standard resistance values of the PCS-100 range from 50mΩ to 1Ω. Its power rating is 100W at 70°C maximum 50A permanent load.
EBG Inc., Middletown, Pa.
Circle 352 freeproductinfo.net/pet

New 3-Phase AC Contactors

This line of 3-phase ac contactors has been expanded to handle requirements up to 185A. They're available with ratings of up to 1,600V peak reverse voltage with a 1.95V maximum forward voltage drop. Output currents go up to 160Arms with forced air-cooling up to 185Arms. They are capable of handling surge currents up to 5,100A. All units are MOV compensated.
CKE, Lucernemines, Pa.
Circle 355 freeproductinfo.net/pet

Power Supply Designer SPICE Package

This new software is a complete switching power supply design solution that provides component design, large-signal simulation, feedback control design, and small signal analysis in one easy-to-use package. It integrates the company's schematic technology with the IsSpice4 analog and mixed-signal simulator as well as magnetics designer transformer and inductor synthesis tool. This SPICE simulation package includes full-featured graphical entry for analog and mixed-signal circuit design, analysis, and test.
Intusoft, San Pedro, Calif.
Circle 353 freeproductinfo.net/pet

Fine Wire High-Voltage Transformer

Model 4283-1300 fine wire high-voltage transformer delivers 0.2W continuous power and features a wide operating temperature range. This flexible transformer package is a surface-mount device that can be custom configured to meet a variety of military, medical, and aerospace applications. It's available in full wave or flyback designs and typically operates at frequencies to 500 kHz, with up to 800V output. Its height is just 0.22 in. maximum for high-density compact circuit board designs.
Datatronics Romoland Inc., Romoland, Calif.
Circle 350 freeproductinfo.net/pet

Dual-Side Cooling Power MOSFET Package

Compared with older technologies, dual-sided DirectFET cooling doubles the system current density of high current dc-dc converters. While the typical junction-to-p. c. board thermal resistance (Rqj-pcb) for an SO-8 is about 20°C/Wmax, a DirectFET package with the same footprint achieves less than 1°C/Wmax. With a low die-free package resistance, this packaging reduces the amount of heat generated by the device. Compared with older technologies, dual-sided DirectFET cooling achieves new levels of conductivity and thermal characteristics.
International Rectifier, El Segundo, Calif.
Circle 354 freeproductinfo.net/pet

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