Power
Optimising automotive pre-boost power supplies - part 2
Part one of this article described the problem, showed the impact of a cold start test pulse on an automotive power supply and discussed a typical pre-booster specification. This second part provides guidance on proper part selection of all relevant components. It also shows the reaction of a pre-booster on a cold crank test pulse and the impact of its error amplifier. By Matthias Ulmann, Texas Instruments.
Compact SMD inductors serve space constraints
Two power inductors from Würth Elektronik eiSos, the WE-PMMI and WE-PMCI, can be used in efficient DC/DC switching controllers where space is limited. They can be used in switching controllers and portable applications.
Dual channel MOSFET protects battery
Claimed to offer best-in-class source-to-source on-resistance (Rss on), the AOC3862 provides the lowest voltage drop and temperature rise in the protection circuit module, says Alpha and Omega Semiconductor. The common-drain 12V dual n-channel MOSFET has a low on-resistance, typical 2.38mΩ at 4.5V and 2.5mΩ at 3.8V gate drive gate drive.
Ruggedly designed 5kW power converter for harsh environments
The C/B 4800 Series of 6U DC/DC and AC/DC converter modules ranging in output power up to 5kW has been introduced by Schaefer.
Huawei P9 smartphone uses Intersil’s regulators
Intersil has announced the adoption of the company’s ISL91110 switching regulators in Huawei’s P9 smartphone. The buck-boost switching regulator supplies power to key system peripherals in the P9 dual-camera smartphone, using a proprietary, fully synchronous four-switch architecture. This advanced architecture enables the seamless transition from buck to boost and delivery of up to 2.5A output current at the lowest single-cell Li-ion ...
12 & 20V MOSFETs offered in dual asymmetric package
Vishay Intertechnology has announced what it claims to be the industry's first AEC-Q101-qualified 12 and 20V MOSFETs in a dual asymmetric power package. To save space and power in high-efficiency synchronous buck converters for automotive applications, the SQJ202EP and SQJ200EP n-channel TrenchFET devices each combine a high- and low-side MOSFET in the compact 5x6mm PowerPAK SO-8L dual asymmetric package.
SiC MOSFETs meet high temperature environments
Designed for faster switching, high temperature power conversion topologies and systems, a silicon carbide (SiC) MOSFET from TT Electronics has a maximum junction temperature of 225°C. The package has a higher ambient temperature capability and can therefore be used in applications, including distribution control systems with greater environmental challenges, such as those in close proximity to a combustion engine, says the company.
Educational tool equips engineers with real-world power expertise
All electronic systems, without exception, need a power solution. A growth in power needs means there is a surging demand for highly skilled power engineers. Texas Instruments is bridging the gap between power theory and real-world applications for engineering students and industry professionals alike with the TI Power Management Lab Kit (TI-PMLK) series.
Industrial DC/DC converters power non-flight-critical programs
Industrial level DC/DC converters and EMI filters are available in models ranging from 5 to 100 watts, from VPT. Converters in the VHR series are reliable to power non-flight-critical programs in military, avionics, and unmanned systems as well as manufacturing equipment and controls.
Li–S batteries could become next-gen energy storage
Energy storage systems with high energy density are essential to fulfilling the ever-increasing demands of electronic devices, electric vehicles, and smart grids for intermittent solar or wind power. The Li-S battery is a promising candidate for next-gen energy storage, with an extremely high theoretical energy density that is five to seven times higher than that of conventional LIBs.