KOA Speer Electronics introduces the new SLN5 Molded Current Sense Resistor, featuring a 7 Watt power rating in 4527 size. The SLN5 offers a terminal port temperature of 70°C. This is a molded resin resistor designed for current detection and provides excellent dimension accuracy, mountability, and shock resistance. In addition, it offers excellent terminal strength, […]
Resistors
Top power electronics threads on EDABoard.com – June
(editor’s note: Intrigued by the problem? Have a question or optional solution? Then click the “Read more” link and follow the conversation on EDAboard.com or log in to EDAboard and participate in the forum thread.) Resistor mounting conditions for full power rating at 70degC ambient? – For the PF2512FKF7W0R007L (7mΩ) 2512 SMT resistor, what is […]
Power Magnetics Catalog Includes Reference Designs
Premier Magnetics, global producer of high-quality magnetic components for switch-mode power supplies, DC-DC converters and data communications applications, announces the availability of its new 87-page catalog providing details of the company’s extensive line of transformers, inductors and chokes designed specifically for switch-mode power supply applications. Also included are reference designs utilizing Premier Magnetics’ devices in […]
Compensating for temperature in high-frequency rectifier diodes
by Koji Ikeda, Sanken Electric Co. and K.C. Nishio, Allegro Micro Systems Over-temperature can be a problem in high-performance switching supplies. New power rectifier diodes build in safeguards to head off heat build-up. Pulse-width-modulated converter and amplifier designs tend to spend much of their time handling significant levels of electrical current. High currents tend to […]
Teardown: What’s inside a Phillips Sonicare electric toothbrush
by Leland Teschler, Executive Editor A novel ac rectification and coil-driving scheme may characterize the electronics found in this widely used oral hygiene instrument. The Philips Sonicare Elite series toothbrush is billed as generating over 31,000 brush strokes per minute thanks to “sonic motion” driving its brush. A teardown reveals what Philips is talking about […]
Varistors give intrinsically safe overvoltage protection
TDK Corporation presents the new T series of EPCOS ThermoFuse varistors for intrinsically safe overvoltage protection. These components are based on disk varistors with diameters of 14 mm (T14 series) and 20 mm (T20 series) that are connected in series with a thermally coupled fuse. The T14 series (B72214T*) covers the voltage range from 130 VRMS […]
SMT shunt resistors handle current sensing
TT Electronics has launched the LRMAP3920 series of high reliability, low value SMT shunt resistors for current sensing duties. With values down to 200μΩ and a power rating of 5W on FR4 fibreglass circuit boards, the maximum measurable current is over 150A, and in most cases is restricted only by the current handling of the […]
New high temperature current sense chip resistor-UR73V
KOA Speer Electronics introduces the new UR73V, 1206 size thick film current sense resistor with a high operating temperature -55°C +155°C. The UR73V2B is AEC-Q200 qualified and has a 0.5W power rating and a resistance range of 10mΩ ~ 100mΩ. With a standard tolerance of ±1.0%, and T.C.R. values of +100ppm/°C and 0 ~ ±250 […]
New high power low Ohm resistor in 0612 Size
KOA Speer Electronics introduces the new WU73, a 1-Watt wide terminal low ohm chip resistor available in an 0612 package. The WU73 is a precision resistor offering resistance values from 10mΩ to 100mΩ with a standard tolerance of ±1%. The WU73 chip resistor features wide side electrodes which provide better heat dissipation and smaller size […]
TT Electronics’ SMT power inductors certified for automotive applications
TT Electronics has launched a new range of surface mount (SMT) power inductors for high frequency and high temperature applications. Named the HA65A series, the inductors are designed to meet the requirements of the growing automotive market’s need for certified, high power inductors specifically for buck, boost or buck-boost power converter topologies for optimum voltage […]