I think the design is not reasonable.
Please refer to the IR company CLASS D design plan in the CLASS D requirements.
I recommend the use of digital amplifier special MOSFET, and digital amplifier special inductor.
If parallel MOSFET, suggest using EF driver added.
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From the Reference document : "A proper input signal is an analog signal ranging from 20Hz to 20kHz with up to 3 VRMS amplitude with a source impedance of no more than 600 Ω."
It sounds to me like GIMARRO's amp isn't working at all.. Either it is defective(and should be returned), or the power supply voltages are out of range for the version of the amp.
Since Class D requires a specific power supply range to "work", the amp has Over and Under voltage protection zener diodes that will shut the amp down if the power supplies go beyond either threshold. In the L20D's case (assuming it is based on the AMP7S-200 version), over voltage protection will occur at 91V and under voltage will happen at 51V (at least according to the rating of the zeners..) So, if his power supply is outside of these ranges, the amp will shut down, or not even power up..
It sounds to me like GIMARRO's amp isn't working at all.. Either it is defective(and should be returned), or the power supply voltages are out of range for the version of the amp.
Since Class D requires a specific power supply range to "work", the amp has Over and Under voltage protection zener diodes that will shut the amp down if the power supplies go beyond either threshold. In the L20D's case (assuming it is based on the AMP7S-200 version), over voltage protection will occur at 91V and under voltage will happen at 51V (at least according to the rating of the zeners..) So, if his power supply is outside of these ranges, the amp will shut down, or not even power up..
ljm, any similarities to the Esoteric I-03? Looks like another variant of the 2092 there....
6moons audio reviews: Esoteric I-03
6moons audio reviews: Esoteric I-03
My pleasure.. I'm finding out more and more about the design, so I'm trying to be useful..
ljm_ljm, have you compared the sound quality of the L20D or L15D when being driven by an SMPS vs a Linear PS?
SMPS vs a Linear PS
Can I contrast is a model, can't summarized all.
In my contrast LINEAR better.
I don't understand this I-03.
There are a lot of expensive power amplifier used IRS2092.
Including ARC DS225.
Interesting amp. I bought a bunch of them off ebay for use in an active loudspeaker and was looking to pair them with an SMPS from Connex.
Would a single SMPS2000R (2000w rated) model be OK powering all six L20D modules?
Connexelectronic
Can I connect the modules directly the PSU and finally I take it I should specify 70v output on the SMPS?
Would a single SMPS2000R (2000w rated) model be OK powering all six L20D modules?
Connexelectronic
Can I connect the modules directly the PSU and finally I take it I should specify 70v output on the SMPS?
SMPS is can be used to L20D. DC +-60 + 70 V.
But, switch power supply more complex than the transformer, the nominal power really can achieve?
If it is me, will see some power testing figure.
L25 D And L20D similar. I will it according to the 250 W 8 OHM power output. More current surplus,
Will better drive 4 OHM load.
Its MOSFET have more power reserves against the power of the test.
I'm glad you be interested.
L25 D And L20D similar. I will it according to the 250 W 8 OHM power output. More current surplus,
Will better drive 4 OHM load.
Its MOSFET have more power reserves against the power of the test.
I'm glad you be interested.
Hi ljm_ljm,
Can the l20d or l25d do 300W into 4Ohm with +/-63v?