LD5521 controller equivalent, quasi-resonant pwm flyback controller.
more protections like OLP (Over Load Protection) and OVP (Over Voltage Protection) to prevent circuit damage occurred under abnormal conditions. Furthermore, the QR jitte.
The LD5521 integrate a quasi-resonant PWM control function into a SOT-26 package. It takes less components counts or circuit space, especially ideal for those total solutions of low cost. The implemented functions include low startup current, green-m.
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