Magnetics Business & Technology - Winter 2015 - (Page 16)

ELECTROMAGNETICS Pulse Electronics Offers High Isolation Power Transformers in Low Profile SMT Package Pulse Electronics Corp. has introduced a new series of 5KVrms isolation power transformers for communications interfaces such as RS485, CAN, MODBus and ProfiBus for automation, automotive, and smart grid applications. The PH9385 transformer series achieves 12 mm creepage in a low-profile, compact, 17 by 16 by 7 mm surface mount package. Pulse's transformer is built with a Sidecar package that has the coil inserted at one side of the open package and the high isolation pins placed on the other side. This configuration separates the coil and pins so there is a greater creepage distance between them. It also enables the package to be smaller while still maintaining an optimal creepage distance. "Isolation in existing toroidal transformer packages is limited by the proximity of the pins to the wound coil," said Gerard Healy, product manager, Pulse Electronics Power Business Unit. "The isolation can be enhanced by encapsulation, but this adds cost. This compact surface mount package achieves a high level of creepage without requiring encapsulation, so besides getting great performance, they are less expensive than encapsulated transformers." Pulse Electronics' new PH9385 series builds on its PH9085 series of 2.5KV power transformers to offer protection for higher isolation applications. These transformers are RoHS-compliant and meet standard EIA481 requirements. They are available in tube and tapeand-reel packaging. Prices start at about $0.84 (FCA HK) for 10,000 pieces. Lead time is eight weeks. Samples are immediately available. Allegro MicroSystems, LLC Introduces New Two-Wire Hall-Effect Latch Allegro MicroSystems, LLC has introduced a two-wire Hall-effect latch with increased magnetic sensitivity. The A1245 latch is produced on the Allegro advanced BiCMOS wafer fabrication process. It implements Allegro's patented high frequency, 4-phase, chopperstabilization techniques to achieve magnetic stability over its full operating temperature range, -40°C to 150°C. A Hall-effect latch will be in the high output current state in the presence of a magnetic south polarity field of sufficient magnitude and will remain in this state until a sufficient north polarity field is present. Two-wire latches are particularly advantageous in cost-sensitive applications because they require one less wire for operation versus the more traditional open-collector output switches. Additionally, 16 Magnetics Business & Technology * Winter 2015 the system designer inherently gains diagnostics because there is always output current flowing, which should be in either of two narrow ranges. Any current level not within these ranges indicates a fault condition. The A1245 is designed for speed and position sensing of ringmagnets or other moving/rotating assemblies in applications that are safety-critical and/or have long wiring harnesses. Examples include automotive applications such as internal mode switch (IMS) transmissions and transmission range switch (TRS)/manual level position sensor (MLPS) shift selectors; electronic parking brake motors; electronic power steering (EPS); and sunroof, tailgate and other motors; industrial/consumer applications include white goods, industrial/factory automation, and automatic doors. Overall ruggedness, including industry leading ISO 7637-2 performance, is achieved with an integrated voltage regulator, clamping diodes, ESD protection, and reverse-battery protection. The device is offered in two package styles. The LH is a SOT-23W style, miniature low profile package for surface-mount applications. The UA is 3-pin ultra-mini single inline packages (SIP) for throughhole mounting. Both packages are RoHS-compliant with 100 percent matte tin leadframe plating. AVX Introduces Tantalum SMD Capacitors for Medical Applications AVX Corp. has introduced the T4J Medical series tantalum SMD capacitors. Specifically designed for use in implantable, non-lifesupport and non-implantable life support medical applications, T4J Medical series capacitors exhibit high standard reliability of fewer than 0.1 percent failures per 1,000 hours at 25°C and rated voltage, which is 10 times better than standard commercial reliability, and low standard leakage current (DCL) values of 0.01CV. Manufactured and screened using AVX's patented and extremely effective Q-Process to ensure the removal of any components that may experience parametric shifts through customer processing or display instability through life testing, T4J Medical series capacitors feature two levels of statistical screening: T4J Standard for standard DCL and ESR limits, and T4J Custom for specific DCL and ESR parameter limits, available down to 0.005CV on selected codes. "The T4J Medical series tantalum SMD capacitors were explicitly developed for implantable, non-life-support and non-implantable life support medical applications, and feature higher reliability and lower DCL than competing products currently available on the market, both of which are critical parameters in medical electronics applications," said Brian Brunette, high reliability tantalum applications engineer, AVX. RoHS-compliant and lead-free compatible, T4J Medical series tantalum SMD capacitors are available in six case sizes spanning 1206 to 2924, seven voltages spanning 6.3 V to 50 V, and two terminations: 100 percent tin or SnPb. Capacitance values for the series span 1 µF to 680 µF with a tolerance of ±10 percent, and operating temperatures span -55°C to 125°C. T4J Medical series capacitors are available packed on 7-inch reels or in bulk, and lead time for the series is 12 weeks.

Table of Contents for the Digital Edition of Magnetics Business & Technology - Winter 2015

Editor's Choice
What the Heck Happened to the Magnet Industry?
An Introduction to Resonant Inductive Power Transfer
Research & Development
Magnetics 2016: Preview
2016 Resource Guide
Industry News
Marketplace / Advertising Index
Spontaneous Thoughts: Small Ball

Magnetics Business & Technology - Winter 2015