发布时间:2022-12-21 15:07:08 作者: 赛威科技 来源:

            2nd Generation Quasi-Resonant (QR-IITM ) PWM Controller with Brownout Protection


   Easily Meet EPS Level 6

   AC Brownout Protection (BOP)

   Proprietary QR-IITM Technology:

●Digital Anti-jitter for Audio Noise Free

   Less than 75mW Standby Power

   Multi-Mode Operation for High Efficiency

   12.7us Maximum On Time

   Built-in Soft Start Function

   Pin Floating Protection

   Cycle-by-Cycle Current Limiting

   Leading Edge Blanking (LEB)

   Constant Power Limiting

   VDD UVLO, OVP & Clamp



Offline AC/DC Flyback Converter for

   AC/DC Adaptors

   SMPS Power Supply

   Laptop Charger



SF5783P is a high performance, 2nd Generation Quasi-Resonant (QR-IITM) PWM controller for offline flyback power converter applications.  The power of IC is supplied by forward excitaton.The built-in proprietary QR-IITM technology with high level protection features improves the SMPS reliability and performance.

In SF5783P, the “Digital Anti-Jitter” function can automatically select and lock a valley at a given loading, which can achieve audio noise free operation.

SF5783P is a multi mode controller. When full loadings, the IC works in QR mode based on the AC line input. When the loading goes low, the IC enters into “Digital Frequency Foldback” mode to boost power conversion efficiency. When the output power is very small, the IC enters into burst mode and can achieve less than 75mW no load power.

SF5783P integrates functions and protections of Under Voltage Lockout (UVLO), VCC Over Voltage Protection (OVP), Output Over Voltage Protection (Output OVP), Cycle-by-cycle Current Limiting (OCP), Pin Floating Protection, Over Load Protection (OLP), AC Brownout Protection, Soft Start, VCC Clamping, Gate Clamping, etc. In SF5783P, the protection functions are auto-recovery mode protection.

 SF5783P is available in SOT23-6 package.

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下一个: SF5533H