Magnetics Business & Technology - Summer 2016 - (Page 22)

ELECTROMAGNETICS Allegro Introduces 1 MHz Bandwidth, Integrated Hall-Effect-Based Current Sensor IC Allegro MicroSystems, LLC has announced its first-ever 1 MHz bandwidth Hall-effect current sensor IC with a 210 ns response time. The ACS730 provides an economical and precise solution for AC or DC current sensing. Allegro's ACS730 is targeted at industrial, commercial and communications systems. Typical applications include motor control, load detection and management, switchedmode power supplies and overcurrent fault protection. This device consists of a precise, low-offset, linear Hall sensor circuit with a copper conduction path located near the surface of the die. Applied current flowing through this copper conduction path generates a magnetic field, which is sensed by the integrated Hall IC and converted into a proportional voltage. Device accuracy is optimized through the close proximity of the magnetic field to the Hall transducer. A precise, proportional voltage is provided by the Hall IC, which is programmed for accuracy after packaging. The output of the device has a positive slope when an increasing current flows through the primary copper conduction path (from pins 1 and 2, to pins 3 and 4), which is the path used for current sensing. The internal resistance of this conductive path is typically 1.2 mΩ, providing low power loss. The terminals of the conductive path are electrically isolated from the sensor leads (pins 5 through 8). This allows the ACS730 current sensor IC to be used in high-side current sense applications without the use of high-side differential amplifiers or other costly isolation techniques. The ACS730 is provided in a small, low-profile surface-mount SOIC-8 package. The leadframe is plated with 100 percent matte tin, which is compatible with standard lead (Pb) free printed circuit board assembly processes. Internally, the device is Pb-free, except for flip-chip high-temperature Pb-based solder balls, currently exempt from RoHS. The device is fully calibrated prior to shipment from the factory. The ACS730 is priced at $1.77 in quantities of 1,000. Pulse Launches First High Isolation Surface Mount Gate Drive Transformer Series Pulse Electronics Corp. has expanded its high isolation gate drive transformer line with a new surface mount series using its patented Sidecar package. The PH9400 series provides isolation in MOSFET and IGBT drivers in industrial applications such as motor drive circuits and solar inverters and for power supplies for a range of medical devices. This series offers a SMT alternative to the existing THT P058xx series while increasing the volts-second capability by up to 300 percent. "Pulse's patented Sidecar package has the coil inserted at one end of an open package with the high isolation pins placed at the other end. This configuration isolates the coil from pins achieving a greater creepage distance between them," said Gerard Healy, product manager, Pulse Electronics Power Business Unit (Pulse Power Division). "This compact construction allows for a larger core to be used, thereby increasing the volts-second capability, while reducing the size and increasing the creepage distance by 50 percent in comparison to the existing THT solution." Murata Launches Automotive-Grade Monolithic Ceramic Capacitors Murata Americas has developed the GRT series, a new line of automotive-grade monolithic ceramic capacitors (MLCCs) that meets the Automotive Electronics Council's (AEC)-Q200 Grade 2 standard. The line is suited for automotive infotainment and comfort-andconvenience applications, such as navigation systems and audio equipment. It offers a case size of 0201 to 1210 (EIA), capacitance range of 1.0 pF to 100 uF, and 4 to 100 VDC rated voltage. Further, the line delivers temperature characteristics of X5R, X6S, X7R and C0G. Over the last several years, there has been an increased demand for both industry-compliant and automotive grade MLCCs. Murata's GRT series is comprised of several variations of the solution to ensure that the market's needs are being fully met. The lineup consists of a range of 818 capacitors offering different temperature characteristics, rated voltages, and case sizes. Given that, these components deliver enhanced reliability in a decreased package size, two critical benefits in designing for infotainment and comfort-and-convenience devices. 22 Magnetics Business & Technology * Summer 2016 www.MagneticsMagazine.com http://www.MagneticsMagazine.com/conferences http://www.MagneticsMagazine.com

Table of Contents for the Digital Edition of Magnetics Business & Technology - Summer 2016

Editor's Choice
Extending the Limits of the Sm2Co17 System
Advances in Manufacture of Low or No Heavy Rare Earths NdFeB magnets
Research & Development
New Measurement Technique Characterizes Permanent Magnets
Electromagnetics
Industry News
The Ambition to Get Highest Flux Densities,Is It Always Reasonable
Marketplace / Advertising Index
Spontaneous Thoughts: Permanent Magnet Mistakes, Part 2

Magnetics Business & Technology - Summer 2016