In summary, PANJIT’s resonant flyback controller integrates a high-side 650V / 4A 1.2 Ω MOSFET in the package. Unlike the passive snubber circuit (lossy snubber) used in traditional flyback systems, this flyback controller utilizes an active snubber circuit (lossless snubber) to make more effective use of the extra energy (leakage inductance and stray components) in the flyback system (energy recycling). PANJIT's CMDRBR adeptly emulates the operational behavior of the original AC bridge rectifier diode, drives and controls the low ON-resistance, high-voltage power switch (such as super junction MOSFET), and optimizes the efficiency of the AC rectification block.