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Medical Edge Jan 12, 2010

MED_Medical Edge_: Designing efficient devices

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January 12, 2010





Designing efficient devices

This issue of Medical Edge focues on the design of efficient medical devices and related topics.
  1. Light from organic films could boost medical
  2. Now that's energy scavenging: In-body microgenerator gets power from the heartbeat
  3. Safety Considerations When Using Optocouplers and Alternative Isolators for Providing Protection Against Electrical Hazards
  4. Super efficient power MOSFET
  5. Switching power supply features 90% efficiency
  6. Load switch features extremely low ON resistance

—Leslie Gordon, Senior Editor


Articles



Light from organic films could boost medical device effciency
European research projects dubbed ILO and OLAS are coming up with more efficient ways to generate light from carbon-based plastic films about a micron in thickness. The result is a multifunctional field-effect transistor able to generate light. The results are being called an international benchmark for the photonic field-effect heterojunction approach.
Full Article

Advertisement

Apple Rubber offers expanded line of medical-grade
elastomer seals and O-rings.

In addition to popular Silicone, Apple Rubber now offers custom O-rings and seals made from medical-grade elastomers such as Viton® fluoroelastomer (FKM) and EPDM rubber. Ideal for medical applications, such elastomers feature improved chemical resistors, excellent heat resistance (400°F/200°C), and low permeability to gases. Capabilities at Apple Rubber include complete engineering support, manufacturing, quality assurance and a Class 10,000 ISO Class 7, certified cleanroom.




Now that's energy scavenging: In-body microgenerator gets power from the heartbeat
A Self-Energizing Implantable Medical Microsystem (SIMM) microgenerator harvests energy by using differential pressure within the chambers of the heart to help augment the existing battery for implanted medical devices, such as cardiac pacemakers and implanted cardioverter defibrillators (ICDs).
Full Article


Safety Considerations When Using Optocouplers and Alternative Isolators for Providing Protection Against Electrical Hazards
Optocouplers and alternative isolation technologies fnd widespread use in a variety of products for signal isolation and high voltage level shifting. These devices may also be used to provide safety related insulation. Considering these electrical concerns, it is necessary to understand the safety related characteristics of the optocoupler or alternative isolator.
Full Article


New Products



Super efficient power MOSFET
Designers of cell phones, medical, portable and consumer applications will now have access to the industry’s lowest RDS(ON) (75mΩ at -4.5V) 20V P-Channel MOSFET in a 1mm x 1mm WL-CSP package. The FDZ371PZ is designed with Fairchild SemiConductor's proprietary PowerTrench process technology.
Full Article


Switching power supply features 90% efficiency
CUI Inc.’s power division, V-Infinity, announces an extension of its high efficiency, high density VMS line of open frame switching power supplies with the 365 W VMS-365 series. These units have a power density of 19 W/in³ and come in an open frame package measuring 3 x 5 x 1.4 in. The VMS-365 can be used in a wide variety of medical and telecom applications, meeting EN60601-1 and ITE EN60950-1 safety standards. With typical efficiency above 90%, this series is suitable for applications where power consumption is a critical consideration.
Full Article


Load switch features extremely low ON resistance
Texas Instruments Inc. introduces a fully integrated load switch with typical ON resistance (rON) of 5.7 mOhm at 3.6 V, four times lower than the nearest competitor, according to company sources. TI’s TPS22924C integrates at least four parts into one to simplify subsystem load management. The high level of integration in an ultra-small 1.4 x 0.9 mm chip scale package (CSP) addresses space-constrained, battery-powered applications such as portable industrial and medical equipment, media players, point-of-sale terminals, global positioning systems (GPSs), netbooks/notebooks, and Smartphones.
Full Article


News from Medical Design



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