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IGBTs Exhibit High Power Dissipation in Solar Inverter Apps

March 18, 2008 11:09 am | International Rectifier | Comments

Using the latest-generation field-stop trench technology to reduce conduction and switching losses, the IRGB40xxDPbF family of 600V IGBTs from International Rectifier reduces power dissipation by up to 30percent in UPS and solar inverter applications of up to 3 kW. The devices are optimized for switching at 20 kHz with a collector-to-emitter saturation voltage from 1.95V to 2.20V and currents from 4A to 48A with a internal soft-recovery diodes

Precision Amplifier Offers 20 fA Guaranteed Input Bias Current

March 18, 2008 10:58 am | Comments

National Semiconductor introduced the LMP7721 precision amplifier 20 fA guaranteed input bias current at room temperature and over the extended temperature range of -40°C to 125°C. According to the company, the device yields maximum system sensitivity and accuracy from photodiode and high-impedance sensors and is suited for improving sensitivity and accuracy in battery operated portable applications

RGB Color LEDs Offer 150° Viewing Angle

March 18, 2008 6:23 am | Comments

Consisting of 3 separate emitters in a 1204-size SMT package (3.2 x 1.0 x 1.5mm) compatible with automated assembly as well as IR and vapor-phase solder reflow, the OVSRRGBCC3 RGB LED provides adjustable-color llight with a viewing angle of 150°. Deployable in a top- or side-mount orientation with a white diffused lens


Low Profile MIL-STD-1553 Dual Transformer with Side-by-side Configuration

March 18, 2008 5:51 am | Comments

Beta Transformer Technology Corporation introduced the DSS-2000 dual transformer with and ultra low profile 0.130” maximum height. The device has a side-by-side configuration and is available in ratios compatible with 3.3V, 5.0V, 12V, and 15V transceivers. The 0.130” height makes suitable for today’s smaller MIL-STD-1553 board topologies and has ratios to meet both long and short stub applications

SMT LEDs Present Sub-Millimeter Profile

March 17, 2008 11:28 am | Comments

Provided in a CLCC-6 FlatPackage configuration, the VLMW621 family of warm-white SMT LEDs is presented as having the lowest profile (0.9mm high) of its type. The ceramic-encased InGan devices are available with luminous intensities from 1800mcd to 7100mcd and thermal resistances of 40K/W junction to pin and 90K/W junction to ambient. The devices have a 140 mA forward current, a 4.3V maximum forward voltage, and 650 mW of power dissipation

Collaborative Equalization Methodology Combines Software and Hardware

March 17, 2008 9:11 am | Comments

Useful for applications from professional sound reinforcement to consumer audio electronics, a collaborative acoustic control methodology developed by Quickfilter Technologies and Real Sound Lab enables engineers to control frequency response for system performance optimization. Combining CONEQ™ (CONvolution EQualizer) software-based technology with the QF1D512 programmable digital filter, the approach generates a speaker transfer function

Charge Pump Drives up to Six LEDs

March 16, 2008 1:49 pm | Comments

Catalyst Semiconductor, Inc. introduced the CAT3637 fractional charge pump LED drivers which address the requirements for high-efficiency and easy LED programming in portable devices. It is optimized for applications with one bank of five or six identical LED channels, a typical configuration for larger LED screen portable products. It incorporates a simplified version of the company’s 1-wire EZDim interface, which supports 16 output power levels, from from zero to 30 mA full brightness

Blind Hollow Shaft Encoders Reduce Potential for Contamination

March 16, 2008 1:43 pm | Comments

VFS 60 blind hollow shaft encoders from Sick Stegmann, Inc. feature a unique nickel code disc that provides robust operation in harsh industrial environments, and tolerance to temperatures as high as 100ºC. They are IP65 rated and deliver from 1ppr to 10,000 ppr in an industry-standard 60 mm housing. The ball bearings that support the encoder shaft are spaced 30 mm apart for excellent concentricity (± 0.3/± 0.1 mm radial; ± 0.5/±0.2 mm axial) and robustness, and minimum encoder vibration


Intermediate-bus Power Controllers are Highly Integrated

March 14, 2008 12:40 pm | Comments

Presented as the first such single-chip devices on the market to integrate high-voltage (75-V) half-bridge MOSFET drivers with a 1.6-A peak current driving capability, the Vishay Siliconix SiP11205 and SiP11206 controllers are designed to work on the primary side of an isolated half-bridge intermediate-bus converter in telecom and network equipment and in 1/16-brick or 1/8-brick power modules. Providing current monitoring and control features, the self-driven synchronous-rectification controllers step down voltages with greater than 95 % efficiency with an input voltage range from 36V to 75V

Surge Protective Devices with Ratings from 40,000A to 200,000A

March 14, 2008 11:05 am | Comments

Phoenix Contact’s VALVETRAB-SQ surge protective devices (SPD) offer safe, reliable surge protection from 40,000A to 200,000A. The NEMA-style product series includes approximately 50 part numbers in three different mountable designs designated by CC (control cabinet), SP (sub-panel), and SE (service entrance) identifiers. The VAL-SQ CC Series offers an economical method of


Reference Designs Create Low-Power Wireless Modules

March 14, 2008 6:17 am | Comments

Providing engineers the ability to create Ultra-Low Power (ULP) ISM-band button-cell powered wireless links, a family of reference designs using Nordic Semiconductor RF tranceiver chips require only a digital In/Out, power (+V) and ground (GND) connection for implementation. The seven module designs are based on the 2.4GHz nRF24L01 (RF Digital Modules RFD21010, RFD21676, RFD21677), nRF2401 (RFD21006), and nRF24E1 (RFD21018) and the 433/868/915MHz nRF905 (RFD21002), and nRF9E5 (RFD21014).

HDTV Image Processor for Embedded Systems

March 14, 2008 5:59 am | Comments

Sensoray introduced a 1080i compatible HDTV image processor for embedded systems in the broadcast and medical markets. The Model 2246 captures an HDTV signal from an HD or SD-SDI source and formats it for display and image compression. Conventional analog video inputs are also accepted. Its high speed hardware can scale and add text/graphics prior to compression, display and storage. A scan converter section formats


Double Level PCB Terminal Blocks Saves Space

March 13, 2008 5:22 am | Comments

The CTBDD93 series feature high quality rising clamp wire connections and are UL, cUL, CE, VDE and IMQ approved. They available in two standard pitches of 5 mm and 5.08 mm, and are ordered as separate male and female connectors. The two connectors can be mounted vertically, or at 90°, to suit different applications. The double level design of the male connector reduces the required space on the PCB by a half. The terminal blocks are molded in green UL94 V-0 flame retardant PA66, and are


High Temperature Preamplifier for Automotive Sensors Operates to +120°C

March 12, 2008 10:11 am | Comments

The Automotive Sensors division of PCB Piezotronics announced a high-temperature preamplifier, designed to overcome high temperature testing challenges associated with NVH powertrain and vehicle underhood testing applications. The Model HT426E01 is a 1/2” preamplifier operating from ICP sensor power, terminating with a BNC connector and utilizing standard coaxial cables. The model also features a low attenuation factor

DSL Filter is Compatible with VDSL2 to 30 MHz

March 12, 2008 6:30 am | Comments

Excelsus brand Z-301LS in-line xDSL filter from is compatible with VDSL2 and can filter frequencies up to 30 MHz. The lightweight 51.3 mm × 19.6 mm × 19.0 mm filter has good intermodulation distortion performance which allows the maximum possible VDSL2 data rates. The 600 Ohm return loss is greater than 14 dB.


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