Dear TIers:
I use a matrix-transformer LLC with the primary-side windings in series and secondary-side windings in parallel（4 branches）as shown above. After using UCC24624 to achive SR control, I have 4 UCCs and 8 SR MOS in total, each UCC is configured in the following SCH. Here, the power supply is a 12V Aux Power.（4 UCCs share ONE Aux Power）
The question is
1. I found ONLY 4 GATE DRIVE SIGNALS are generated , all of which are from VG1（left side of the IC）, VG2s have no signal out.
2. Once you restart the 12V Aux Power, DRIVE SIGNAL form VG2 may occur (1 or 2). After MAIN POWER restart while the Aux Power on, DRIVE SIGNAL form VG2 will neve appear any more, unless you restart the 12V Aux Power.
In sum. I can only see 4 drive signals from VG1s operating normally, VG2 signals occur like Randomly？？?（I don't if it is related to my PCBlayout ）
(before this, I used MP6925 as SR IC which worked well)
Look forward to ur reply!!
