KOA Speer Electronics expands the resistance values of the 1206 size TLR2B/2BW metal plate chip current sense resistors, available now in 1mΩ and 1.5mΩ. The power rating for the 1206 chip size TLR2B is 0.5Watt and TLR2BW is 1Watt. These resistors feature a metal alloy to provide superior corrosion and heat resistance, with a small […]
Resistors
Top power electronics threads on EDAboard.com – August
(editor’s note: Intrigued by these power electronics problems? 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.) IGBT circuit problems – I have some doubts on a result I’ve obtained. I’m using a circuit, as […]
Low resistance resistor jumper operates at -55°C to +170°C
KOA Speer Electronics introduces the TLRZ series metal plate zero ohm jumper, available in 0603, 0805, and 1206 package sizes with current ratings of 26A, 31.6A, and 40A respectively. The TLRZ is a low resistance resistor jumper with an operating temperature of -55°C to +170°C. The TLRZ’s metal plate construction provides excellent dimension accuracy and […]
Non-magnetic thin film chip resistors deliver ratings to 6 W in 1206 and 2512 cases
Vishay Intertechnology, Inc. introduced a new series of high-power, surface-mount, precision non-magnetic thin film chip resistors. Built on aluminum nitride substrates, the Vishay Dale Thin Film PCNM series offers power ratings of 2 W and 6 W in compact 1206 and 2512 case sizes, respectively. The aluminum nitride substrates of the resistors released today feature […]
Molded current-sense resistors handle 7 W
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, […]
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 […]
