LLC vs AHB (Hybrid flyback)


I would like to ask question about LLC vs AHB

  1. For Pout >140W/200W. Why LLC is recommended to use in common usage, rather than AHB?
    is it related to LLC with 2 output mosfets share the current stress, but AHB with 1 output mosfet only? Or other reason (eg efficiency data) ?

  2. Most LLC mass production charger is with “Extra” resonant inductor for stability inductive region ,
    but most AHB mass production/demo board charger is without “Extra” resonant inductance, just use transformer leakage inductance to do so.

Why AHB can use transformer leakage inductance as resonant inductor? But LLC can not?
Why AHB can accept this relative high tolerance of leakage inductance in design, but LLC can not?

Thanks a lot

My 10 cents, the article mentions that hybrid flyback topology, utilizes a resonant capacitor to output extra power through the transformer and is more suitable for higher power applications compared to conventional flyback topology, and it can also experience a second SR gate and shoot-through. Therefore, possibly LLC is recommended over AHB for high power applications because of its superior control of synchronous rectifiers and lower risk of shoot-through. Also, the challenges of controlling SRs in different flyback variants, may also contribute to the preference for LLC in common usage.