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Old 26th October 2011, 03:08 AM   #101
MrSlim is offline MrSlim  Canada
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As per my comments above, the Over and Under Voltage protection Zeners also have to change(Z100,Z101) if you want to run the board at lower voltages.
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Old 26th October 2011, 10:25 AM   #102
Cyan is offline Cyan  Italy
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Quote:
Originally Posted by ljm_ljm View Post
Temporarily, I don't have IRFI4212H.

But, L15D can use lower voltage, modify the resistance data .
How about balanced connection? Can they natively work with xlr connections?
I think this one: Class D Audio SDS-224 Amplifier - Class D Audio Amplifiers - PRODUCTS
Is based on the irs2092 (but much more expensive ). It has a good balanced support.

I really hope to see a L10D version with 60w, without need to change anyting
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Old 26th October 2011, 12:06 PM   #103
MrSlim is offline MrSlim  Canada
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Quote:
Originally Posted by Cyan View Post
How about balanced connection? Can they natively work with xlr connections?
I think this one: Class D Audio SDS-224 Amplifier - Class D Audio Amplifiers - PRODUCTS
Is based on the irs2092 (but much more expensive ). It has a good balanced support.

I really hope to see a L10D version with 60w, without need to change anyting
The SDS-224 must be using some balanced to unbalanced converter onboard, since the irs2092 input is unbalanced...
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Old 28th October 2011, 02:52 PM   #104
Cyan is offline Cyan  Italy
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Quote:
Originally Posted by ljm_ljm View Post
Temporarily, I don't have IRFI4212H.

But, L15D can use lower voltage, modify the resistance data .
Too complicated for me who don't know anything about diy . I will wait hoping that in the future the l10d will become commercially available
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Old 28th October 2011, 04:22 PM   #105
ljm_ljm is offline ljm_ljm  China
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Quote:
Originally Posted by MrSlim View Post
As per my comments above, the Over and Under Voltage protection Zeners also have to change(Z100,Z101) if you want to run the board at lower voltages.
B: yes. It is to point to IRAUDAMP7S. For example, I make L15DX2.

But not including L15D. It does not limit the voltage regulator.
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Old 28th October 2011, 04:25 PM   #106
ljm_ljm is offline ljm_ljm  China
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Quote:
Originally Posted by Cyan View Post
Too complicated for me who don't know anything about diy . I will wait hoping that in the future the l10d will become commercially available


This is not complicated. I often such modified to work of low voltage.

Maybe I'll consider soon after to L10D of. How much do you think DC POWER is more convenient
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Old 28th October 2011, 04:43 PM   #107
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Quote:
Originally Posted by ljm_ljm View Post
This is not complicated. I often such modified to work of low voltage.

Maybe I'll consider soon after to L10D of. How much do you think DC POWER is more convenient
The issue is that when one wants to build a multi-channel amp, voltage requirements do not change, but amperage requirements can go up drastically. This is not a big deal if using a linear supply, but a SMPS does not have the same flexibility.

For example, I want to build an 8-channel amp, and I have calculated my DC requirements to be +/- 40V, but the total peak current draw will be in the neighborhood of 16 amps. For a given power level, you can get more amps if the voltage of the SMPS is lower, and therefore you don't have to buy more power supply than you need.
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Old 28th October 2011, 05:25 PM   #108
ljm_ljm is offline ljm_ljm  China
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Originally Posted by 454Casull View Post
The issue is that when one wants to build a multi-channel amp, voltage requirements do not change, but amperage requirements can go up drastically. This is not a big deal if using a linear supply, but a SMPS does not have the same flexibility.

For example, I want to build an 8-channel amp, and I have calculated my DC requirements to be +/- 40V, but the total peak current draw will be in the neighborhood of 16 amps. For a given power level, you can get more amps if the voltage of the SMPS is lower, and therefore you don't have to buy more power supply than you need.

I like L15D himself. Even spent more time to modify its performance.

It works in DC +-50 V is for most of the power supply requirements,

And the output power of the sound box needs.

I think the CLASS D is the advantage of efficiency, relative simulation for power amplifier, big power some advantages are more obvious.

I don't like the small power CLASS D, CLASS T. 10 to 30 watts of power I prefer to use
LM4766T.
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Old 29th October 2011, 03:09 AM   #109
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ljm_ljm,

With the heat sink vertical on the board it doesn't look like convective airflow over the fins will be very good, since the board underneath blocks it.

Do you know what is the maximum average power that a module can dissipate when in a closed box?

And how much if the box has ventilation holes above the heat sink?

Also , what are the dimensions of the board? I searched but didn't find them, and the ebay vendors don't give them either.

Thanks
__________________
-----------------------------------------
Noah
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Old 29th October 2011, 05:22 AM   #110
MrSlim is offline MrSlim  Canada
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The dimensions are on the board layout diagram in most of the ebay ads (see the edges..) its about 131MM x 57 MM
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