LOAD Sharing & Constant Current Mode：
Constant Current illustrate:
1.Design the output voltage is equal to 10V in full load condition at U7A.
2.If U7A's Vo>11,It's means Po>110%. The output of U8B(constant current mode) will inject the signal to VFB(VFB was risen, Vo was dropped).
3.The VFB was controlled by the constant Current Mode。Even if the VFB is TL431 or secondary controller.
1.The input of U7A is detect the output current. There anyone power current over than another. The sharing pin will pull high level than another power. That could make the U10A and U11A to trigger the Q26. The R74 will parallel with the resistor which VFB to gnd. The VFB will cover the output voltage to force the current sharing.