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LT4320 based active rectifier

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#1,364
fab said:
Can someone points me out the bom for the smd board. Especially for the smd mosfet selected.
thanks
Fab
Click to expand...
Fab,

Which version? There is a version of the SMD board with 2 mosfets (each is a dual die) and there is another version with 4 individual mosfets (latest one). Please specify and I can try to share what I have learned.

Basically there are criteria to satisfy. They are:

1. highest Vds (depending upon your voltage application)
2. Lowest RDS(on)
3. Highest Vgs(th) (2V min!)
4. Lowest total gate charge Qg.

For the single individual mosfet variety: In my view, TPH4R50ANH is an all round champion of the lot.

For the dual die, try SQJB00EP

Best,
Anand.
 
Last edited:
#1,366
1. LT4320 CRC PSU PCB
IXXRei x 1
SpeakerT x 4
RickRay x 4
wcwc x 4
2.LT4320 THT RECTIFIER
Reima x 8
ozorfis x 8
IXXRei x 2
Tamura X 4
poseidonsvoice X 8
jdoorn X 8 pair
namghiwook x 2
wcwc x 4 pair
3.LT4320 SMD RECTIFIER
enochRoot x 20 pair
Reima x 4
namghiwook x 4
wcwc x 4 pair
 
#1,367
1. LT4320 CRC PSU PCB
IXXRei x 1
SpeakerT x 4
RickRay x 4
wcwc x 4
2.LT4320 THT RECTIFIER
Reima x 8
ozorfis x 8
IXXRei x 2
Tamura X 4
poseidonsvoice X 8
jdoorn X 8 pair
namghiwook x 2
wcwc x 4 pair
3.LT4320 SMD RECTIFIER
enochRoot x 20 pair
Reima x 4
namghiwook x 4
wcwc x 4 pair
RickRay x 2

I added a couple more.
 
#1,368
1. LT4320 CRC PSU PCB
IXXRei x 1
RickRay x 4
wcwc x 4
2.LT4320 THT RECTIFIER
Reima x 8
SpeakerT x 4
ozorfis x 8
IXXRei x 2
Tamura X 4
poseidonsvoice X 8
jdoorn X 8 pair
namghiwook x 2
wcwc x 4 pair
3.LT4320 SMD RECTIFIER
enochRoot x 20 pair
Reima x 4
namghiwook x 4
wcwc x 4 pair
RickRay x 2
 
#1,369
1. LT4320 CRC PSU PCB
IXXRei x 1
RickRay x 4
wcwc x 4
2.LT4320 THT RECTIFIER
Reima x 8
SpeakerT x 4
ozorfis x 8
IXXRei x 2
Tamura X 4
poseidonsvoice X 8
jdoorn X 8 pair
namghiwook x 2
wcwc x 4 pair
BRN x 8
3.LT4320 SMD RECTIFIER
enochRoot x 20 pair
Reima x 4
namghiwook x 4
wcwc x 4 pair
RickRay x 2
 
#1,371
@wcwc

That info is in the design doc of the LT4320 controller. Contingent upon using N-ch MOSFETS that can handle your voltages the voltage range is from 9V to 72V, absolute max is to 80V:

IMG_0163.jpeg


The thru hole version is the same application as what X has done in his SLB power supplies and you can use the same MOSFETS he has or choose others. My post #1364 lists the design choices that need to be made for the MOSFETS and the 1st page of this thread has some nice discussions and calculations to alleviate concerns regarding MOSFET heat in high current applications, etc…

Best,
Anand.
 
Last edited:
#1,372
1. LT4320 CRC PSU PCB
IXXRei x 1
RickRay x 4
wcwc x 4
2.LT4320 THT RECTIFIER
Reima x 8
SpeakerT x 4
ozorfis x 8
IXXRei x 2
Taro x 4
poidonsvoice X 8
jdoorn X 8 ペア
namghiwook x 2
wcwc x 4 ペア
BRN x 8
Tamra x 4
3.LT4320 SMD RECTIFIER
enochRoot x 20 ペア
Reima x 4
namghiwook x 4
wcwc x 4 ペア
RickRay x 2
 
#1,374
1. LT4320 CRC PSU PCB
IXXRei x 1
RickRay x 4
wcwc x 4
2.LT4320 THT RECTIFIER
Reima x 8
SpeakerT x 4
ozorfis x 8
IXXRei x 2
Taro x 4
poseidonsvoice X 8
jdoorn X 8 pair
namghiwook x 2
wcwc x 4 pair
BRN x 8
Tamra x 4
3.LT4320 SMD RECTIFIER
enochRoot x 20 pair
Reima x 4
namghiwook x 4
wcwc x 4 pair
RickRay x 2
anoob x 8
 
#1,375
prasi said:
Hello folks,
For people looking for a compact solution for crc psu using LT4320, here is a proposal...

The pcb below can be used for dual secondary as well as CT transformers.
1. in case of dual secondary, one could substitute the SIP rectifiers (B1 AND B2) (of the type https://www.vishay.com/docs/84807/pb3506.pdf) with my SMD LT4320 rectifier pcbs. (B3 and its snubbers unpopulated).

2. In case of CT trafo use, you could use the vishay sip rectifier with a heatsink similar to this ATS-PCB1061 Advanced Thermal Solutions Inc. | Fans, Thermal Management | DigiKey . Just cut off the support pins i not necessary.

I am posting a few 3D as well as sch, stuffing guide and gerbers for convenience here again (already posted in apex 100w amp thread but i guess its like finding needle in haystack)

Now the resistors can be 2 of bpr56 /58 -5W each side or 6 of 6mm dia max. axial resistors of 23mm pitch populated from bottom side.

I have tried to explain the use of psu in sch in a detailed manner, do have a careful look. The caps can be 35mm dia max with 10mm pitch-2pin OR 22.5mm pitch-4pin.

regards
prasi
Click to expand...
Hi
do you have version without center point ?
like two PSU in one PCB ?
 
#1,380
1. LT4320 CRC PSU PCB
IXXRei x 1
RickRay x 4
wcwc x 4
2. LT4320 THT RECTIFIER
Reima x 8
SpeakerT x 4
ozorfis x 8
IXXRei x 2
Taro x 4
poseidonsvoice X 8
jdoorn X 8 pair
namghiwook x 2
wcwc x 4 pair
BRN x 8
Tamra x 4
flocchini x 8
cibo * 4
3. LT4320 SMD RECTIFIER
enochRoot x 20 pair
Reima x 4
namghiwook x 4
wcwc x 4 pair
RickRay x 2
anoob x 8
 
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