100W con 1.5V!

Da Marf Ven 9 Ott 2009 - 16:42

http://www.elektor.com/news/100-watts-of-audio-from-1-5-volts.1100209.lynkx?utm_source=UK&utm_medium=email&utm_campaign=news

http://www.audiumsemi.com/

Shocked

Da mgiombi Ven 9 Ott 2009 - 16:52

Applications
Battery powered MP3 docking station speaker systems
Totally wireless speakers for home and PC audio
USB powered speakers
FPTV
Sound bars
Audio for automotive

Chi lo sa...nemmeno i Tripath erano nati con scopi audiophile...

Da pincellone Lun 12 Ott 2009 - 14:12

100-W audio amp is 20 times more efficient than Class D chips

The AS1001 audio power amplifier IC is claimed, at normal listening levels, to be 20 times more efficient than competing devices, such as Class D amplifiers — and that without compromising audio quality. The company also claims that the amplifier is so efficient that battery-powered amplified loudspeakers can run for up to 10 months on a set of four C batteries, playing for three hours per day, vastly reducing CO2 from power generation and pollution from battery production.

100W con 1.5V! Hlcn05_nov2009

The device operates from a nominal 1.5-V power supply and delivers 100-W peak power output. Applications include totally wireless speakers, home theater surround-sound speaker, and battery-powered travel speakers.

It also enables the development of smaller, cooler, mains-powered audio equipment. Housed in a 64-pin QFN package, the amplifier operates directly from a 0.8 to 1.8-V supply (compatible with, for example, alkaline primary cells and Ni-MH secondary cells). ($8 ea/1,000 — samples available now.)

Audium Semiconductor, Bristol, U.K.
Huw Davies 011-44-0-117 985 6950
info@audiumsemi.com
http://www.audiumsemi.com

Da roby2k Lun 12 Ott 2009 - 14:36

Da Barone Rosso Lun 12 Ott 2009 - 17:47

Probabilmente sfrutta l'autoinduzione delle bobine per aumentare la tensione di uscita, esattamente come fanno gli alimentatori switching che accrescono la tensione di uscita.

Direi un ottima idea, se poi suona pure bene.

Pero avere 100w con 1.5v significa che la batteria deve poter dare fino a 66A, e una batteria del genere non mi sembra che esista.

Da ANDR3A101 Lun 12 Ott 2009 - 18:11

si ma con una tensione piu alta, c'è bisogno di meno amperaggio...
gia a 12volt...

Da Marf Lun 12 Ott 2009 - 21:03

leggevo: "...Audium, previously known as M-Stream Technology..."

M-Stream:
http://www.broadcom.com/press/release.php?id=816609
tecnologia sviluppata da broadcom per i chip dei cellulari?? mah... Surprised