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Class D Switching Power Amplifiers and Power D/A conversion

Regulated powersupply for UCD modules??
Regulated powersupply for UCD modules??
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Old 26th September 2007, 07:41 PM   #1
Jonnravn is offline Jonnravn  Denmark
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Default Regulated powersupply for UCD modules??

Has anybody tried using a regulated powersupply with there UCD modules?
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Old 26th September 2007, 08:09 PM   #2
Pierre is offline Pierre  France
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Some people has tried regulated PSUs but switching ones, not linear. You will ruin the high efficiency of a Class-D using a regulated linear PSU.
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Old 27th September 2007, 05:16 PM   #3
Jonnravn is offline Jonnravn  Denmark
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Why will I ruin the effeciency of the modules by using a regulatet supply?.....is that not just a question of making the regulated supply able to deliver the 20 amps that UCD modules are limited to?
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Old 27th September 2007, 09:16 PM   #4
Pierre is offline Pierre  France
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Well, in a linear regulated PSU, you need a raw DC voltage above the regulated value. Let's say that, in order to have some margin, you need above 10-15V over the required output. Any current drawn by the amplifier, multiplied by that difference will becompe power dissipated in the pass devices (transistors, typically) of your regulated PSU.
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Old 28th September 2007, 03:34 AM   #5
ghemink is offline ghemink  Netherlands
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Quote:
Originally posted by Pierre
Well, in a linear regulated PSU, you need a raw DC voltage above the regulated value. Let's say that, in order to have some margin, you need above 10-15V over the required output. Any current drawn by the amplifier, multiplied by that difference will becompe power dissipated in the pass devices (transistors, typically) of your regulated PSU.

Unless you use a capacitance multiplier, which is kind of semi-regulated. Then you can have less voltage drop in the regulator itself.

Best regards

Gertjan
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