Introduction

Highlights of this issue include new product releases from Linear Technology, Schroff UK, Cypress Semiconductor and Intersil; design features on three-phase DC/DC controller and dual-input linear charger; power electronics related design ideas; schedule of the SPEEDAM 2010 symposium and the EPE-PEMC 2010 conference; and research studies on the ultra-low power energy harvesting for wireless switches and wireless sensor networking.


 

Synchronous step-down controller
Linear Technology has introduced the LT3741, a synchronous, step-down DC/DC converter designed to accurately regulate output currents up to 20A. Its 6 to 36V input voltage range, constant-current and constant-voltage operation make it suitable for a variety of applications, ranging from battery and supercap chargers and laser drivers to high-current LED lighting.
Linear Technology

Switched-mode power supply
Schroff UK has expanded its 19inch maxpowerPRO family of switched-mode power supplies with the addition of a 6U model designed specifically for high-power CompactPCI applications. Featuring an output of 500W, the new 13100-145 power supply operates from a wide input voltage range of 90 to 264V AC with PFC and delivers output voltages of 5V, 3.3V, 12V and -12V.
Schroff UK

AC/DC digital power controllers
Cypress Semiconductor has introduced AC/DC digital power controllers for LED lighting. The CY8CLEDAC01/02 controllers offer a cost-effective solution for both non-dimmable and dimmable LED lighting, delivering high efficiency while meeting EnergyStar requirements.
Cypress Semiconductor

Dual synchronous buck regulator
Intersil’s ISL8088 dual, synchronous buck provides high-power conversion efficiency and low quiescent current in a small package. The device is an 800mA/channel dual step-down regulator with integrated power MOSFETs. The 2.7 to 5.5V input voltage range and 35µA quiescent current make the device suitable for battery powered and other “Green Power” applications.
Intersil
 

Three-phase DC/DC controller operates up to 140ºC
Linear Technology has introduced the LTC3731H, a PolyPhase, high-efficiency, synchronous DC/DC controller with assured operation for junction temperatures as high as 140ºC offered in a 5x5mm QFN package. This device is expandable from 3- to 12-phase operation for 60A to 240A power supply designs.
Linear Technology

50mA low-dropout linear voltage regulator
ON Semiconductor has introduced the NCP508, a low-current voltage regulator that offers an efficient and economical solution to generate a low power voltage rail. The new regulator provides a solution that supports low power, space-efficient and cost-effective designs in applications such as touch screens, keypads, smart phones, portable meters, printers, and remote controls.
ON Semiconductor
 

Battery simulator has variable ESR response
You may lack experience and hardware when designing battery-operated products. The battery life of a product can depend more on the ESR (equivalent series resistance) than the terminal voltage. This situation is especially true when you use switching regulators to boost the battery voltage. The switching regulator creates a higher load as the battery voltage decreases.

Dual-input linear charger
Maxim Integrated Products has introduced the MAX8934, a dual-input linear charger with Smart Power Selector circuitry to implement the Japan Electronics and Information Technology Industries Association recommendations for safe charging over temperature.
Maxim Integrated Products
 

SPEEDAM 2010, 14-16 June, 2010, at Pisa, Italy
SPEEDAM 2010 is the 20th International Symposium on Power Electronics, Electrical Drives, Automation and Motion. The power electronics related topics covered in this symposium include power electronic devices, silicon carbide technologies, converter topologies and control, renewable energy applications, aerospace applications, home applications, and lighting systems.


EPE-PEMC 2010, 6-8 September 2010 at Ohrid, Republic of Macedonia
The main goal of EPE-PEMC Council and EPE Association is to promote and coordinate the exchange and the publication of technical, scientific and economic information in the field of Power Electronics and Motion Control. The conference topics include semiconductor devices and packaging; power converters; control of power converters; electrical machines and actuators; motion control, robotics, adjustable speed drives; application and design of power electronic systems; and measurements, sensors and observing techniques.
 

Ultra-Low Power (Microwatt) Energy Harvesting For Wireless Switches And Wireless Sensor Networking – Types, Applications, New Developments, Industry
Ultra-low power energy harvesters, or micro energy scavengers, are small electromechanical devices which harvest ambient energy and convert it into electricity. Energy scavengers can harvest different types of energies. Solar energy can be harvested with photovoltaic solar cells, thermal energy can be harvested with thermoelectric generators, mechanical energy can be harvested with piezoelectric, electromagnetic or electrostatic converters, and finally, electromagnetic energy can be harvested through RF resonators.
 

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