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1W DC-DC converter measures only 8.30x6.10x7.55mm Murata’s miniature MEU1 series of single isolated output 1Watt DC-DC converters measures just 8.30x6.10x7.55mm, a 26% footprint reduction compared to the company’s previous release. Available as through-hole mounting with staggered style pinouts, the MEU1 can deliver its output power over the whole temperature range of -40 to +85ºC. The reduction in converter volume and footprint allows engineers to reduce the overall dimensions of their application, which is critical for space-constrained designs. Conversion efficiency has also been improved by typically 6% across the full load range compared to previous models. Murata claims that the MEU1 series has a load regulation typically 3% better than the industry norm, when compared to similar miniature throughhole converters. A total of 14 models are available across the series, catering for the popular input voltages of 3.3, 5, or 12 VDC and providing outputs of 3.3, 5, 9, 12, or 15 VDC. 1kVDC galvanic isolation aids reduction of switching noise and allows the converter to be configured to provide an isolated negative rail in systems where only positive rails exist. Murata Europe www.murata.eu Wireless power system charges multiple consumer devices, remotely After over 6 years of development in stealth mode, Ossia which was founded in 2008, made its the first public announcement of a new wireless power technology dubbed Cota. Operating in the WiFi frequency range and with a similar reach within the home, Cota enables users to charge or power a wide range of devices well beyond smartphones. Ossia’s patented smart antenna technology uses phased arrays of transmitters to transfer power without the use of inductive coils, ultrasonic waves, magnetic resonance, charging pads or mats. Capable of delivering 1W of power wirelessly on the receiver side, the Cota technology consists of two parts: a charger and a receiver. On the receiver side, the company expects to provide the Cota technology either as a chip and module, or as IP to be licensed to chip manufacturers for integration into cell phone designs. The Cota-powered charger automatically locates Cota receivers built into devices or batteries, those deliver signals that are sent omnidirectionally. Once they hit the charger, these signals follow the same path back to the receiver, focusing energy at the exact location of the device. The wireless power system can be left open for any equipped device to recharge, or locked to specific devices (through initial pairing). Ossia www.ossiainc.com MCUs draw only 0.25uA in a 32KHz standby mode Lapis Semiconductor has developed ultra-low power microcontrollers designed for devices such as watches or security tokens that require long-term operation using just coin or drycell batteries. The ML610Q474 family features a very low current consumption, drawing only 0.25uA in Halt mode, one of the chip’s standby modes). That is 50% less than what conventional products require, says the manufacturer. The ML610Q470 series integrates a recently developed internal regulator and oscillator circuit and adopts proprietary low-leakage current processes. In addition, high noise immunity is ensured through novel internal circuitry and layout (clearing ±30KV during IEC61000-4-2 noise immunity testing), unlike conventional models that were prone to noiseinduced malfunction when the current consumption was lowered. The chips come in 16KB Flash and 16kB ROM versions. A support system including an ML610Q474 reference board and software development environment are available for evaluation. Lapis Semiconductor www.rohm.com/eu www.electronics-eetimes.com Electronic Engineering Times Europe October 2013 47


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