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Class D Switching Power Amplifiers and Power D/A conversion

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Old 20th August 2012, 03:12 PM   #541
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Quote:
Originally Posted by redjr View Post
Roughly how many watts does that yield from that amp module?

Using sine wave I could attain a 95W but my speakers almost exploded.

Using 70% of volume in most of the musics it hardly consumes more than 20W from the wall, but sound stronger than my vintage marantz thas has 250W. Actually if I set the volume to 80% the whole street will be able to hear.


T1 Alps and T2 Tk2050
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Old 21st August 2012, 02:22 PM   #542
redjr is offline redjr  United States
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Originally Posted by jalejos View Post
My Hypex 5x180W in 1U rack
May I ask what low-profile traffo you are using and where it was purchased. Link? Was it custom made?
Thx,
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Old 21st August 2012, 10:57 PM   #543
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New soon

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Old 29th August 2012, 01:46 PM   #544
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Default A SIMPLE POST-FILTER FEEDBACK TOPOLOGY FOR CLASS-D AMPLIFIERS

This amplifier,
a custom ordered project is based on the idea from "PhaseAccurate" (ChL). The nice thing about this amp is the fact that it handles a wide load range from nominal to open load equaly well. Operating range is from +-30V..+-60V with max. output level signals from 25Vrms to 70Vrms.

The design is based on two equal half bridges that are being used in full bridge mode for higher output levels. This is an almost analog amplifier featuring NO special components except for the half bridge gate drivers chips being used (IRS2011). The modulator is based on the classical TriangleWave Generator in front of a comparator generating the PWM output signal for the half bridges. The amplifier is carrier based 384KHz featuring zero offset output with noiseless turn-on including notch fitlers after the LC's for additional carrier suppression.

I have no test figures yet, however on my old 200W Panasonic 3 way audio box it sounds very well. I encourage everyone to read the paper from "PhaseAccurate".

Many thank's for the help and this great paper "A SIMPLE POST-FILTER FEEDBACK TOPOLOGY FOR CLASS-D AMPLIFIERS "

AnalogIntrest
Attached Images
File Type: jpg 2012-08-29-206.jpg (968.4 KB, 1761 views)
File Type: jpg +-30V Supply +-50Vpkpk-50W.jpg (85.2 KB, 545 views)
File Type: jpg +-60VSupply+-100V_Output.jpg (134.2 KB, 204 views)
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Old 4th September 2012, 10:47 PM   #545
jalejos is offline jalejos  Spain
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Quote:
Originally Posted by redjr View Post
May I ask what low-profile traffo you are using and where it was purchased. Link? Was it custom made?
Thx,
See in noratel.com but was a custom made in Spain.
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Old 5th September 2012, 12:10 AM   #546
redjr is offline redjr  United States
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See in noratel.com but was a custom made in Spain.
Ah-ha! I thought it was custom made. I'll check out the site. Thx.
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Old 8th September 2012, 12:44 PM   #547
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First DIY project. Nothing much to be proud of, what I did was mostly soldering, drilling and swearing.
The board is a DIY KIT I bought from on diyhifishop (awesome service)
The chassis comes from hifi2000.

Amplifier: Class D TDA8950
Output Power: 2 x 150 W @ 4 Ohm (supposedly)
Total cost: A little less than 170 US$

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Old 8th September 2012, 02:07 PM   #548
qusp is offline qusp  Australia
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Quote:
Originally Posted by AnalogIntrest View Post
This amplifier,
a custom ordered project is based on the idea from "PhaseAccurate" (ChL). The nice thing about this amp is the fact that it handles a wide load range from nominal to open load equaly well. Operating range is from +-30V..+-60V with max. output level signals from 25Vrms to 70Vrms.
very interesting project, love the Right angle SMD coaxial inputs
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Old 15th September 2012, 10:51 PM   #549
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Wow, nice pictures!

Today I build my 8 channel amplifer - sure electronics 2 x 4x100W TK2050.

Sounds on my infinity betas 50 great - with my Player: oppo BDP-95.

complete.jpg

build0.jpg

build1.jpg

build2.jpg

build3.jpg

complete2.jpg
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Old 16th September 2012, 01:15 PM   #550
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And two "daylight shots"

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