AN3303

How to implement the board in the converter

Doc ID 18164 Rev 2

17/27

4

How to implement the board in the converter

The demonstration board is intended to implement synchronous rectification in an LLC

resonant converter with center-tap secondary winding. If the converter implements diode

rectification, rectifiers must be removed and the board must be connected as indicated in

Figure 21. Connect the transformer center-tap to the converter output. Tie the other two

secondary outputs respectively to pins 1, 2, 3 and to pins 11, 12, 13; bond pins 4, 5, 9, and

10 to secondary ground. The central pin 7 is for supplying the SRK2000 and can be

connected to the converter output. Pins 6 and 8 are connected to the EN pin and can be

used to inhibit the IC remotely. The board connector pin-out is perfectly symmetrical and, if

necessary for mechanical issues, the board tie to the converter can be rotated by 180°.

Figure 21.

How to implement the board on an existing converter