All items tagged with power supplies (23)

Searching for a Unicorn Part 1: Measuring Voltage Regulator Ripple Rejection

January 20, 2021 by Brian Lowe

Searching for a Unicorn Part 1: Measuring Voltage Regulator Ripple Rejection

In this article Brian Lowe shares a fascinating journey in his search for a "Unicorn" that is measuring voltage regulator ripple rejection - or power supply rejection ratio (PSRR). Lowe is the founder and principle engineer at Belleson, LLC, and he has devoted a lot of time to this fascinating "quest." This article was originally published in audioXpress, May 2019.

Power Control Reference Design Enables a Secondary Side Microcontroller to Control Primary Power

January 7, 2021 by audioXpress Staff

Power Control Reference Design Enables a Secondary Side Microcontroller to Control Primary Power

Microchip announced a new reference design using its MCP1012 high voltage auxiliary AC-DC controller, demonstrating the ability to remove the independent bias power supply in many applications. The MCP1012 offline auxiliary device enables the system to transfer control of the power and duty cycle to a secondary MCU. The reference design includes a patented isolation technique called Inde-Flux transformer technology being licensed to Würth Elektronik eiSos.

Keysight Technologies Infiniium EXR-Series Oscilloscopes Offer Advanced Automated Measurement Technology

November 16, 2020 by Cristina Costa

Keysight Technologies Infiniium EXR-Series Oscilloscopes Offer Advanced Automated Measurement Technology

Keysight Technologies announced the new Infiniium 8-channel oscilloscope technology. Keysight's Infiniium EXR-Series Mixed Signal Oscilloscopes include eight models ranging from 500 MHz to 2.5 GHz and either 4 or 8 channels with wide-ranging upgradeability. The EXR-Series' waveform update rate is >200,000 waveforms/sec., allowing it to quickly build eye-diagrams capturing 5.7 Million UIs. Powerful and intuitive, the new oscilloscope series reduces test bench and workflow complexity.

B&K Precision Introduces AC Sources With 3-Phase Capability and Up to 3000 VA Per Phase

September 1, 2020 by Cristina Costa

B&K Precision Introduces AC Sources With 3-Phase Capability and Up to 3000 VA Per Phase

B&K Precision announced the 9830B Series programmable AC power sources providing high performance and low total harmonic distortion in a 3U form factor. Offering 2000 VA or 3000 VA models, the new 9832B and 9833B provide the ability to connect three instruments to create a 3-phase AC power source using the convenient 3-phase kit (TL983P-KIT) option. The adapters included in the kit provide synchronization and timing signals to create a 3-phase system, with voltage, phase, and frequency parameters controllable from the front panel or remotely using the provided PC software.

Essential Updates on Headphones, TWS, Hearables, Voice and More in audioXpress April 2020

March 9, 2020 by audioXpress Staff

Essential Updates on Headphones, TWS, Hearables, Voice and More in audioXpress April 2020

The April 2020 edition of audioXpress is now available and features two essential Market Updates, one focusing on the industry transition to active headphone and earphone designs, and another on how to leverage the latest voice capture and processing technologies. The issue also explains how to evaluate listening effort, and Stuart Yaniger puts the Linear Audio Autoranger Mk II Interface to the test, while Ed Simon writes about AC Power Rectification. Another issue to read and use as reference.

Listen, Test, and Measure It! audioXpress March 2020 Now Available.

February 11, 2020 by audioXpress Staff

Listen, Test, and Measure It! audioXpress March 2020 Now Available.

audioXpress March 2020 focuses on Audio Test & Measurement. In this edition, learn how to find the right Test & Measurement solution, learn more about how to optimize audio production tests, and read the review of the new Dayton Audio DATS V3 Test System. Luke McCready also reviews the fantastic Audeze Mobius planar magnetic, wireless headphones. There's plenty more to read and learn about in our regular columns Sound Control and Audio Scope, plus a new article from Ed Simon on Powering Audio Circuits.

Get Inspired with Voice Coil October 2019 Edition, Now Available!

September 25, 2019 by audioXpress Staff

Get Inspired with Voice Coil October 2019 Edition, Now Available!

The October 2019 edition of Voice Coil is packed full of essential reading material. Vance Dickason discusses Zero Phase in Studio Monitors with commentary from industry experts. In Acoustic Patents, a new Speaker Structure design patented by Yamaha, and a new Passive Acoustic Radiator Module, invented by Joseph Sahyoun are under review. And Test Bench characterizes a new high power coaxial compression driver and horn from B&C Speakers, and a 28 mm silk dome tweeter from Trueanalog. Now available to download!

Infineon OptiMOS Power MOSFETs with Highest Power Density and Efficiency

July 1, 2019 by audioXpress Staff

Infineon OptiMOS Power MOSFETs with Highest Power Density and Efficiency

Available in space-saving SuperSO8 packages, Infineon's OptiMOS 3 and 5 best-in-class (BiC) power MOSFETs enable higher power density in addition to improved robustness compared to former models. With the new components, system costs are reduced while the overall performance is increased. The OptiMOS power MOSFET devices from Infineon are designed for synchronous rectification in power supply applications and are the ideal choice for other applications such as low voltage drives and Class D amplifiers.

New Digital Signal Controller (DSC) Accelerates DSP Performance for Time-Critical Control Applications

September 28, 2018 by audioXpress Staff

New Digital Signal Controller (DSC) Accelerates DSP Performance for Time-Critical Control Applications

Microchip announced the new dsPIC33CK Digital Signal Controller (DSC) with expanded context selected registers to reduce interrupt latency and new, faster instruction execution to accelerate Digital Signal Processor (DSP) routines. With 100 MIPS performance, the core delivers almost double the performance of previous single-core dsPIC DSCs, making it ideally suited for digital power and other applications requiring sophisticated algorithms.

A Power Supply Spreadsheet

February 7, 2018 by Paul J. Stamler

A Power Supply Spreadsheet

This article describes a spreadsheet program for designing low-voltage power supplies using common IC three-terminal regulators. The spreadsheets are in standard Excel format, and should work in just about any spreadsheet program. Each file has two main pages: one for use with common variable-output regulator chips, the other for fixed-output devices. This article was published in audioXpress, March 2010.

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