Datasheet

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