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EETE JAN 2014

A2E_EETimes_2_375x10.87_A2.qxd 12/10/13 12:10 PM Cell balancing IC recovers energy U L T R A M I N I A T U R E and provides charge flow monitoring Surface Mount Making up to 96% of the energy in a battery pack usable, LT8584 is a monolithic Audio flyback DC/DC converter that can handle 2.5A average currents, and is designed to actively balance high voltage stacks of batteries, as found in electric and hybrid Transformers and Inductors Low Profile from .18"ht. See full Catalog immediately w ww.pi co elec t ro nics.co m • Manufactured and tested to MIL-PRF-27 • Frequency range 20 Hz to 250 KHz • Power and EMI Inductors • Available from 100 milliwatts to 3 watts • Impedance from 20 ohms to 100 K ohms • Operating temperature -550C to +130oC (Class V, 155˚C available) • Low Profile from .18"ht. • Thru-Hole available Delivery-Stock to one week for sample quantities PICOElectronics, Inc. 143 Sparks Ave., Pelham, N.Y. 10803 www.picoelectronics.com E Mail: info@picoelectronics.com Pico Representatives Germany ELBV/Elektronische Bauelemente Vertrieb E-mail: info@elbv.de Phone: 0049 89 4602852 Fax: 0049 89 46205442 England Ginsbury Electronics Ltd. E-mail: rbennett@ginsbury.co.uk Phone: 0044 1634 298900 Fax: 0044 1634 290904 vehicles. LT8584 offers high efficiency active balancing, which redistributes the charge from the stronger cells (higher voltage) to charge the weaker cells during discharge. This enables the weaker cells to continue to supply the load, extracting 96% of the entire stack capacity where passive balancing usually extracts, according to Linear Technology, approximately 80%. Passive energy balancing protects against damage to cells by over-charge or deep discharge, but offers no improved run-time as it dissipates the added energy of the higher capacity batteries to match the lowest one. The device includes an integrated 6A/50V power switch, enabling an average discharge current of 2.5A while offering a simple and compact application circuit. Its isolated balancing design can return charge to the top of the battery stack or to any combination of cells in the stack. Linear Technology www.linear.com 4-wavelength integrated 100Gbps EML-TOSA Mitsubishi Electric has developed a laser diode-transmitter optical subassembly (TOSA) that enables 100Gbps optical transmission in one fibre using four-channel wavelength-division multiplexing. The unit helps downsize 100Gbps communication facilities and expand high-speed 100Gbps optical transmission networks. Compliant with IEEE 100GBASE-LR4, the FU-401REA TOSA features four electro-absorption modulators with laser diode (EML) and an optical multiplexer integrated in one compact package measuring only 8.8×26.5×5.6mm, a 75% reduction in footprint compared to the existing FU-412REA model, claims the manufacturer. The new EML chip can operate at up to 15 degrees Celsius higher than the company’s previous model and cooling power is reduced by 50% to help lower the operating power of optical-transceiver modules. The unit achieves a maximum transmission distance of 10km, with an output power ranging from -2 to +2dBm. Mitsubishi Electric www.MitsubishiElectric.com USB-driven dual-port vector network analyser covers the 400 to 4000MHz range The VNA-0440 vector network analyser from MegiQ is a bi-directional two-port unit allowing detailed impedance measurements of antennas, circuits and components. With its 400 to 4000MHz measuring range, the instrument covers the most popular communication bands for GSM-LTE, GPS, ISM, Wifi, Dect and more. A version with an extra generator output allows the characterization of 3-port devices, like splitters and hybrids. It features an internal, programmable bias generator with bias-Tee’s allowing full automatic parametric measurements of amplifier and varactor or PIN circuits. An UFL kit allows users to measure circuits on micro-PCBs, like baluns, antennas, amplifiers. Other kits are available such as WFL, SMA, balanced, including calibration tools. The ‘RF Sandbox’ provides new users with a series of experiments, so they can be up and running within 10 minutes. PC software provides intuitive control, extensive graphing, data export and reporting. Measurements and set-ups can be stored in sessions for easy ‘Retrace-and-Compare’. The handy ‘Click-and-Match’ calculates and simulates matching circuits. MegiQ www.megiq.com www.electronics-eetimes.com Electronic Engineering Times Europe January 2014 41


EETE JAN 2014
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