LT4320 based active rectifier

[beardman]

What is best to use ,for best sound, on C2 1uf cap

ceramic or film cap

can this C2 cap be lower in value,,,i mount the board direct on a 6800uf 80v , to my amp

Best Bjarne

 

[ghitus]

hi ghitus and ckwong99,
i will send you tracking number as soon as i ship.
sorry i have been bit busy with work so wasnt able to ship.
regards
prasi

Hi Prasi, can you give any news about the shipment, please?

Thank you,
Gaetano.

 

[metal]

Prasi, which SMD package are you referring to in this post, DD or MSE package?


Are you offering those PCBs in this post?

 

[prasi]

hi metal,
yes those are mse pack.
yes the same pcbs are being offered in the gb.

 

[prasi]

Hi Prasi, can you give any news about the shipment, please?

Thank you,
Gaetano.

Hi Gaetano,
i will updatre shipping info tomorrow.
regards
prasi

 

[prasi]

What is best to use ,for best sound, on C2 1uf cap

ceramic or film cap

can this C2 cap be lower in value,,,i mount the board direct on a 6800uf 80v , to my amp

Best Bjarne

1 uf ceramic should be minimum.

 

[prasi]

From 3D pcb model, this led resistors seems rather big (likely 1 or more watts). 1/4 or at most 1/2 could be enough?

Thank you,
Gaetano.

depends on your voltage. eg. 50V, 5mA would require 10k. it will dissipate 0.25W. So 1/2 W to 1W resistor would be needed

 

[ghitus]

Thinking to realize a PS which has to output from 35 to 45V DC (I don't know exactly the value, because I don't know exactly the voltage requirement of the power amp I will build,I had to study...), which resistor should I use? And above all, how can I estimate the transformer specs for a given PS DC output voltage, using your rectifier?

Many thanks and regards,

Gaetano.

 

[metal]

hi metal,
yes those are mse pack.
yes the same pcbs are being offered in the gb.

Hi prasi,


How much does the PCB from this post cost?
Which CRC PCBs are you currently offering?


For the moment, put me for these:


SMD LT4320 rectifier - 2 USD per pair 10x


I will continue my order once you answer my questions.





Thank you very much for your efforts.

 

[prasi]

1. lt4320 smd pcbs (your posted link) are 2 usd per pair (2 nos.) pcbs ( LT4320 based active rectifier )
2. lt4320 tht is 3.5 usd per pair ( LT4320 based active rectifier )
3. lt4320 crc psu pcb is 6.5 usd per pcb. ( LT4320 based active rectifier )

 

[metal]

Sorry, I don't understand what you mean by new old stock, can you please list what PCBs you are offering at the moment.

 

[prasi]

here are sch and stuffing guides
1. smd rectifier pcb (sold in pair- 2 usd per pair)
2. tht rectifier pcb (sold in pair- 3.5 usd per pair)
3. crc psu pcb (sold in singles- 6.5 usd per pcb)

 

[metal]

In this post, I thought you were offering ICs, when I read your previous answer today I figured these were the PCBs. Anyway, do you also offer these chips as well? If not can you or anyone plz direct me where to find the cheapest prices yet reliable source for these ICs.


Kindly find below my order:
1. CRC PCB: x1 pcs
2. THT PCB: x1 pair
3. SMD PCB: x1 pair

 

[ckwong99]

Hi Prasi, you have PM pls chk thx

 

[prasi]

In this post, I thought you were offering ICs, when I read your previous answer today I figured these were the PCBs. Anyway, do you also offer these chips as well? If not can you or anyone plz direct me where to find the cheapest prices yet reliable source for these ICs.


Kindly find below my order:
1. CRC PCB: x1 pcs
2. THT PCB: x1 pair
3. SMD PCB: x1 pair

I never offered any IC or mosfets in any of the GB. I only offer PCBs. Just to be clear/.

 

[prasi]

Hi all,
shipping info updated in the below google link. it can be tracked on ALL-IN-ONE PACKAGE TRACKING | 17TRACK website

look towards the end for your username and shipment track number.
LT4320 RECTIFIER AND LT4320 CRC PSU GROUP BUY - Google Sheets

 

[ghitus]

Hi all,
shipping info updated in the below google link. it can be tracked on ALL-IN-ONE PACKAGE TRACKING | 17TRACK website

look towards the end for your username and shipment track number.
LT4320 RECTIFIER AND LT4320 CRC PSU GROUP BUY - Google Sheets

Many thanks Prasi!

 

[Dan K]

Hi Prasi, Pehaps this is a stupid question, but I'll ask anyway:

What is the max RMS AC voltage that these rectifiers can take across the 2 input pins? Is this actually 50V AC (RMS) across the inputs?

What's the max DC voltage that they can output? Is it +72V and - 72V at the outputs, or a total value of 72V. Ie +/- 36V?

Could 2 be used in parallel to allow double the working voltages?

Many thanks

Dan

 

[jean-paul]

https://www.analog.com/media/en/technical-documentation/data-sheets/4320fb.pdf

No paralelling of any kind. Paralleling means the voltage would stay the same as well, it comes with the principle.

 

[Dan K]

Also, What happened to the snubber that was originally on the AC input Side? Was it deemed unnecessary?

Thanks again