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Articles by Yong Ang
Onsemi: Integrerade drivare gör det möjligt att klara 80 Plus Titanium
Att öka effektiviteten har alltid varit ett viktigt mÃċl för tillverkare av strömförsörjningsprodukter. Det ÃĊr en av de verkliga âwin-winsâ eftersom det inte bara minskar driftskostnaderna utan ocksÃċ minskar slöseriet med energi i form av vÃĊrme vilket i sin tur innebÃĊr att kylningen kan göras enklare. Det minskar dessutom storleken och kostnaderna för strömförsörjningen. Ytterligare fördelar ÃĊr mindre kylning av rummet och minskat ljud frÃċn flÃĊktar.
How to Achieve the Ultimate AC/DC Power-Conversion Efficiency with Bridgeless Totem-Pole PFC Controllers
Electrical energy is supplied by the grid as AC, yet most devices that we use require DC power, meaning that AC/DC power supplies that make this conversion are one of the most common loads placed on energy grids. As the world focuses on energy efficiency in a bid to protect the environment and manage operating costs, the efficient operation of these power supplies becomes increasingly important.
Mit Totem-Pole-Controllern die AC/DC-Leistungswandlung optimieren
AC/DC-Wandler kommen in vielen Anwendungen vor. Deshalb sollte der Wirkungsgrad hier möglichst hoch sein, um Kosten und Ressourcen zu sparen und dadurch die Umwelt zu schützen. Spezielle Totem-Pole-Controller zur Leistungsfaktorkorrektur helfen hier. Totem-Pole-Controller zur Leistungskorrektur helfen bei der Optimierung des Wirkungsgrads.
How to Achieve the Ultimate AC/DC Power-Conversion Efficiency with Bridgeless Totem-Pole PFC Controllers
Electrical energy is supplied by the grid as AC, yet most devices that we use require DC power, meaning that AC/DC power supplies that make this conversion are one of the most common loads placed on energy grids. As the world focuses on energy efficiency in a bid to protect the environment and manage operating costs, the efficient operation of these power supplies becomes increasingly important.
Totem-pole PFC techniques and technologies for more efficient PSUs
By Yong Ang, Yong Ang, Strategic Marketing Director, ON Semiconductor Losses in an input bridge rectifier are a hurdle in achieving the best efficiency from AC-DC power supplies. The bridgeless totem-pole power factor correction (PFC) is an elegant solution that replaces the lossy bridge rectifier and PFC FET and boost diode with four active switching devices. However, the topology must use a complex control algorithm and this may need a microcontroller, which can be expensive.
Biological pretreatment: An innovative approach to addressing taste and odor
1 INTRODUCTION The occurrence of objectionable taste-and-odor (T&O) compounds in drinking water represents significant concerns for water utilities. An AWWA survey found that 43% of 800 utilities surveyed in the United States and Canada reported T&O complaints lasting more than 1 week, and treatment strategies for episodic T&O events amounted to an average of 4.5% of the annual utility budget (Suffet, Corado, Chou, McGuire, & Butterworth, 1996).
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