Ideal Bridge

/Quasimodo

Ideal Bridge

LT4320 based CRC PSU PCB from following thread

https://www.diyaudio.com/community/threads/lt4320-based-active-rectifier.336572/

Mosfets

SUP70060E-GE3 $32 for 16 150 stock 100v, 131A, 4.8 mohm

A 1μF ceramic and a 10μF minimum electrolytic capacitor must be placed across the OUTP and OUTN pins with the 1µF ceramic placed as close to the LT4320 as possible.

Parts

584LT4320HN81#PBF U2 Bridge Controller

78SUP70060EGE3 Q1-Q4 Mosfet

505MKS2D041001K00MS C2, C3 Film Cap 1uf, 100v

75517D106M100AA6AE3 C1, C4 Electro Cap, 10uf, 100v

0.15 uf =150 nf wima cap CS1, CS

15 ohm RS1, RS quasi reading 14 ohms, 15 was closest value

0.01 uf = 10nf CX1, CX from junk drawer

CLC

Hammond 156B 1.5mH, 5A, 70 mohms 2.81 long x 1.50 wide x 1.69 tall

2.38 hole to hole About $20 each

Quasimodo

I used a quasimodo fixture to determine the values to use for CX, CS and RS to shunt the transformer secondaries

Quasimodo results thread

I have the surface mount version, where C3 (CS or cap in series with resistor) = 0.15 uf
It is soldered in.

CX is recommended to be 0.01 uf. But you can change and try different values.

Using

Connect transformer secondary to tx connector (screw down wires)

Short out all primaries together, and other secondary. For a dual independent secondary supply.
If secondaries are in series or parallel, connect them same way for measuring.

Connection for center tapped

Connect scope to output

Pot should be inserted with screw toward middle of board. Insert CX/C2 that you plan to use.

Set scope for 1 usec/div timebase and 1 V/Div amplitude

Set pot to full clockwise (max R)

Plug in Quasi, and find ringing

Turn pot counterclockwise until ringing lowers

Continue until third peak is flat. Turn off Quasi, remove and measure pot (middle lead and lead under screw)
First peak is short, 2nd peak is full waveform.