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Diodes Incorporated AP33510 Quasi-Resonant Flyback GAN Controller is specially designed for offline flyback power supplies that require low standby power, high-power density, and comprehensive protection. The device operates in QR mode at full load allowing switching events to occur in the drain-source valley, minimizing switching loss. The AP33510 has an internally limited switching frequency of 150kHz maximum. The device ensures stable valley switching and prevents transformer audible noise caused by frequency hopping via a proprietary valley-lockout technique inside.
The Diodes AP33510 Quasi-Resonant Flyback GAN Controller decreases load from full when it enters into PFM mode with frequency foldback for higher power conversion efficiency. At no load or light load, the AP33510 will enter burst mode to minimize power consumption, and the minimum switching frequency (about 25kHz) is set to avoid any audible noise. Piecewise linear line compensation guarantees a constant output power limit over an entire line voltage range.
To confirm converter ruggedness, the AP33510 implements comprehensive protective features such as brown-in/out detection, cycle-by-cycle current limiting, output OVP/UVP, overload protection, and overtemperature protection.
