Maybe in some high current/high power you could do better with an active rectifier, but in most common cases the current is too low to be worth the complications...
So, for now at least, bridge rectifier, no doubt.
So, for now at least, bridge rectifier, no doubt.
The use of active rectification in audio is prompted by better perceived sound, not efficiency.
So, for now at least, active rectification, no doubt. 🙂
So, for now at least, active rectification, no doubt. 🙂
What myth? I’m not aware of any.
This whole video is made up case with wrong active rectifier application, just to get some views and earn some money. Using active rectification for a very low load and with extremely high RDS On MOSFETs to compare efficiency! Really? 🙄
Exactly.
I replaced FBR with Active Rectifier in my classA amp AN39 long time ago, because FBR was even with big heatsink running too hot. Now with AR it runs fine not even warm.
What myth?
I replaced FBR with Active Rectifier in my classA amp AN39 long time ago, because FBR was even with big heatsink running too hot. Now with AR it runs fine not even warm.
What myth?
There is thread and groupbuy about AR i particitated and purchased finished on board.
I have not assembled it myself.
But the search function is down.
I have not assembled it myself.
But the search function is down.
I have no ideea what sort of better perceived sound you get when hard switching mosfets in a stairs pattern, but 2% efficiency on resistive loads and the holly smoke without PFC sound bad .
Indeed, that's not the usual bridge for an "audiophile" amplifier working below +- 70v dc, but I think that the added complexity is not justified in an audio application unless you're too lazy to place some 10nF capacitors over your bridge and transformer. For some weird reason I was never able to "hear" the rectifier bridge in a properly done amplifier.I must be deaf...
Indeed, that's not the usual bridge for an "audiophile" amplifier working below +- 70v dc, but I think that the added complexity is not justified in an audio application unless you're too lazy to place some 10nF capacitors over your bridge and transformer. For some weird reason I was never able to "hear" the rectifier bridge in a properly done amplifier.I must be deaf...
No idea either.
But my active bridges at 3.5A do not even get warm.
https://www.diyaudio.com/community/threads/lt4320-based-active-rectifier.336572/
Hard to find something with seatch function down.
But my active bridges at 3.5A do not even get warm.
https://www.diyaudio.com/community/threads/lt4320-based-active-rectifier.336572/
Hard to find something with seatch function down.
Active rectifiers do have the potential for better efficiency ( way better in some cases ), that's the whole point of synchronous rectification in switching DC to DC converters. But they only make sense in high current applications, in audio amplifier you rarely need such terrible complication.
Maybe when talking about SMPS as the power unit of the amplifier, then yes, at high power levels you make it part of the control system it's self.
But for most 50/60hz power transformer applications, active rectification is just making life difficult...
PS: The idea that active rectification provides better sound is just audiophile crap!
Maybe when talking about SMPS as the power unit of the amplifier, then yes, at high power levels you make it part of the control system it's self.
But for most 50/60hz power transformer applications, active rectification is just making life difficult...
PS: The idea that active rectification provides better sound is just audiophile crap!
For every application there is proper tool.
Replacing FBR with AR make no sence in low power application.
Replacing FBR with AR make no sence in low power application.
If you go to a metal scrap yard you'll find tons of 48...56v dc power supplies with active rectification, which are intensively used in telecom, trains inverters or other mobile applications, but in very high power fixed applications 3 phase rectification solves all the problems easily.
What type of rectifier is used in present-generation power amps currently shipping from Pass Labs?
What type of rectifier is in power amps currently shipping from Mark Levinson?
What type of rectifier is in power amps currently shipping from Luxman?
What type of rectifier is in power amps currently shipping from Dan D'Agostino?
What type of rectifier is in power amps currently shipping from Constellation?
What type of rectifier was used in (the ten most significant audio power amplifiers of all time)?
What type of rectifier is in power amps currently shipping from Mark Levinson?
What type of rectifier is in power amps currently shipping from Luxman?
What type of rectifier is in power amps currently shipping from Dan D'Agostino?
What type of rectifier is in power amps currently shipping from Constellation?
What type of rectifier was used in (the ten most significant audio power amplifiers of all time)?
2% efficiency difference? Based on false setup “evaluation”!
LT4320 controller doesn’t produce “holly smoke” without PFC. LT4320 Datasheet
Real efficiency improvement is about 7% based om my case. My A class amplifier with active rectifiers consumes about 170 W with 3A idle current, both channels combined. Bridge rectifier will have 1V forward voltage, as a minimum, for actual pulse current charging capacitors. That would add minimum 6 W per rectifier (two diodes are conducting on each halfwave) or + 12W for both rails, if design was adjusted to maintain the same PS output voltage (+1V higher AC voltage per rail required). So, amp with standard rectifiers will consume 182 W or 7% more.
Not yet 🙂
Besides this proves nothing. Otherwise we still be using film cameras.
All depends on fact if AB gets cheap enough.