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Old 14th May 2013, 01:27 PM   #711
dudaindc is offline dudaindc  United States
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Quote:
Originally Posted by Tekko View Post
My latest prototype, based on a patent by Anaview/Abletec:
More details please...
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"All measurements are wrong! Thus, measurement is the art of handling errors."
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Old 14th May 2013, 02:13 PM   #712
Tekko is offline Tekko
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Heres a link to the patent: Patent US20120235742 - Power amplifier - Google Patent
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Old 18th May 2013, 05:48 PM   #713
Wieslaw Lipowsk is offline Wieslaw Lipowsk  Poland
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Class D Amp Photo Gallery
Default My TDA7498 Sure

Here's my heavily tweaked Class-D amplifier
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File Type: jpg IMG_0800.JPG (316.5 KB, 2056 views)
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Old 19th May 2013, 08:38 AM   #714
JLesterP is offline JLesterP  Philippines
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My Class D amplifier.

An Iraudamp1 derivative. Onboard bias regulator, low side current sensing, adjustable osc freq., adjustable trip current. All through hole components.

Power supply: +-35VDC to +-75VDC (25A), 12VAC (2A) aux supply

1 Pair IRF(x)4227/ IRFB4127
IR2110/IRS2110/FAN7392
HEF4069
LF356N/TL071
PCB Size 3 x 4.7"
T157-2

Power measurements to follow.
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File Type: jpg IMG_6168.jpg (374.8 KB, 1959 views)
File Type: jpg IMG_6169.jpg (254.4 KB, 1835 views)
File Type: jpg IMG_0038.jpg (242.7 KB, 1740 views)

Last edited by JLesterP; 19th May 2013 at 08:51 AM.
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Old 19th May 2013, 09:11 AM   #715
Tekko is offline Tekko
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Your inductor looks like its too large for the footprint on the board.
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Old 19th May 2013, 09:26 AM   #716
Tekko is offline Tekko
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I put my class d prototype in a box: Class d now in a box - YouTube
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Old 19th May 2013, 12:40 PM   #717
JLesterP is offline JLesterP  Philippines
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Quote:
Originally Posted by Tekko View Post
Your inductor looks like its too large for the footprint on the board.
As suggested by AN-978 application note. I've made the source of the high side mosfet and the drain of the low side mosfet very close to each other, so I minimize the pcb track between them as much as possible. That's why the footprint of the inductor is compromised.

This is one of its early prototypes. I improved it by using some of the information in IR's Design tips.

Click the image to open in full size.

Sample video on first power up. I connected it to my JBL GT5-12
JLAmp1000D - YouTube
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File Type: jpg IMG_6203.JPG (293.0 KB, 200 views)
File Type: jpg IMG_6202.JPG (348.3 KB, 180 views)

Last edited by JLesterP; 19th May 2013 at 01:05 PM.
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Old 21st May 2013, 07:10 PM   #718
squatt3r is offline squatt3r  Philippines
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hifimediy T4
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Old 25th May 2013, 03:55 PM   #719
JLesterP is offline JLesterP  Philippines
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I tested my amp on 4 ohms subwoofer.

JLAmp1000D
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Old 27th May 2013, 05:15 PM   #720
micfre is offline micfre  Canada
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Multi-way based on Connexelectronics class D modules

Click the image to open in full size.

A bit more detail and album at:
Forum Connexelectronic • View topic - My 2013 build - multi-way class D
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