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Class D Switching Power Amplifiers and Power D/A conversion

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Old 15th April 2013, 04:04 PM   #261
akraj is offline akraj  Bangladesh
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Quote:
Originally Posted by manojtm View Post
Hi Raj,

1. Remove 1nF capacitor connected to GND near 1N4148 x2(pin-2 of IC TL071) and use 33uH coil and add 1K resistor paralell with 1K 1% (frq. adjust)
2. Connect 1KHz signal if you have or any audio signal with min. volume
3. Check Pin-5 of IR2110 with DSO with respect to GND(it will show @400KHz square signal)

Regards
MANOJ
Thanks Manoj, I will try to manage a DSO.

Can i short with jumper if I don have 33uH?

Thanks
Raj
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Old 16th April 2013, 07:22 AM   #262
manojtm is offline manojtm  India
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Quote:
Can i short with jumper if I don have 33uH?
Hi Raj,

Don't short coil.

Regards
MANOJ
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Old 16th April 2013, 10:09 AM   #263
akraj is offline akraj  Bangladesh
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Smile Manoj Aud with On board BIAS and protection with uC

Hi Manoj:

I am trying to make a complete board where BIAS and all kind of protection will be present.

Please have a look and modification instruction is welcome.\

Thanks
Raj
Attached Files
File Type: pdf 003. AUD600 Ver3.0 with Microcontroller.pdf (230.3 KB, 523 views)
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Old 16th April 2013, 12:39 PM   #264
manojtm is offline manojtm  India
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Hi ALL,

Very simple limiter for AUD600 using apex power+signal+clip circuit with LDR & LED
It is very effective

Regards
MANOJ
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Old 16th April 2013, 01:29 PM   #265
manojtm is offline manojtm  India
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Hi ALL

This the attachment

Regards
MANOJ
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File Type: jpg APEX signal led + clip+limit.jpg (122.4 KB, 771 views)
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Old 16th April 2013, 02:53 PM   #266
stewin is offline stewin  Kenya
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Quote:
Originally Posted by akraj View Post
Hi Manoj:

I am trying to make a complete board where BIAS and all kind of protection will be present.

Please have a look and modification instruction is welcome.\

Thanks
Raj
thanks but akraj pls post pcb files. have you tested it with high voltage?
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Old 16th April 2013, 05:25 PM   #267
akraj is offline akraj  Bangladesh
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Amp circuit tested by many ppl and protection schematic has been simulated in proteous. Hope they will work. Still some modification needed, after test I will share.
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Old 20th April 2013, 10:53 AM   #268
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Hi Manoj, can i use this core for your AUD600 amp? its from old TV smps.
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File Type: jpg Core 1.jpg (190.1 KB, 676 views)
File Type: jpg core 2.jpg (174.2 KB, 65 views)
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Old 20th April 2013, 04:20 PM   #269
manojtm is offline manojtm  India
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Hi Sandeep,

yes, use gap 1mm all or 1.5mm center

Regards
MANOJ
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Old 21st April 2013, 02:55 PM   #270
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how can i get 33uh? pls tell me swg and turns........................
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