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Author Archives: Steve Bush

What can 10° colour space do for you?

Solariq S 13

To my shame, when I read that Osram was binning its new Solariq S 13 lighting led to the CIE2015 10° colour space, I didn’t know what the last bit of that statement meant. It turns out I am not alone, and part of the reason Osram is making this particular led is to educate the lighting world to the ...

More on: TI’s unique 10MHz dc-dc topology

TI period 3

Texas Instruments has unveiled a dc-dc topology, for which it is claiming industry’s highest current density: 50A/cm3, for a 12V 10A 10MHz converter. The target was to shrink a high-current dc-dc converter; and the best known path to small size is to increase switching frequency to reduce the need for large inductors and capacitors. However, the standard buck converter is ...

Sealing nylon 3D prints

Laser sintered nylon 3D prints are porous – with a surface like Trebor mints according to 3Dprint-UK, unless they get treated in some way. Sealing the material, which seems to be it is PA2200, to stop it getting grubby or leaking water into one-off enclosures is not an exact science. 3D print firm Shapeways has a blog with a link ...

New topology gives TI 10MHz dc-dc conversion

TI TPS54A20 dc dc

Texas Instruments has unveiled a new dc-dc topology, and with it is claiming industry’s highest current density for a 12V, 10A, 10MHz dc-dc converter at 50A/cm3. Similar to a two-phase buck converter, the added series capacitor allows the switching transistors to operate at half the input voltage, more than halving switching losses, TI energy systems engineer Pradeep Shenoy told Electronics Weekly. ...

LoRa eval kit aimed at metro area networks

Microchip RN2483 RN2903

Microchip has released LoRa wireless evaluation kits, claiming them to be the first on the market. They provide all the components needed to create a low-power 10 mile range network for North America (915MHz, kit DV164140-2) or for Europe (868MHz DV164140-1). Each kit includes two wireless sensors (‘motes’) based on Microchip’s RN2483 or RN2903 LoRa modules, a gateway and a ...

SEPIC vs fly-back

Just found an interesting article comparing fly-back and SEPIC power supply topologies getting a particular job done – a dc-dc converter for cars. It is excellent, because both the supplies were built and tested. Even more excellent, if is from an Electronics Weekly article, written by a couple of TI guys, whe really know what they are taking about. Read ...

Rohm feeds NXP MCUs with multi-output power chip

Rohm BD71815GW

Rohm has announced a multi-function power chip (PMIC) for NXP’s i.MX 7Solo and i.MX 7Dual processors. Called BD71815GW, it has five low-quiescent current buck regulators, seven LDOs, a JEITA-compliant 1S charger, a fuel gauge with Coulomb Counter, an LED driver and a real-time clock (RTC), alongside extensive monitoring and protection circuits. All possible processor power modes are supported, said Rohm, ...

TI claims industry’s fastest 14bit ADC

TI

Texas instruments is claiming the fastest 14bit ADC yet with one that works at 3Gsample/s, delivering “an instantaneous 1.5GHz-per-channel bandwidth, enabling engineers to implement wideband in-phase and quadrature-component receivers beyond 2.5 GHz”, said the firm. The dual-channel ADC32RF45 can be used for direct RF signal conversion up to 4GHz,” said TI. “The first in a new data converter family, it eliminates up ...

MEMS photonic integration opens door to 25Gbit/s

Leti four wavelength receiver

IRT Nanoelec in Grenoble has integrated a III-V/silicon laser and silicon Mach Zehnder modulator to transmit at 25Gbit/s down a single 10km optical fibre, claiming this to be a first. “This transmission rate usually is achieved using an external source, over a 10km single-mode fibre,” said the R&D organisation, which is predicting increased bandwidth and reliability as well as power reductions ...