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SF5773S
The SF5773S is a high-performance, 2-neodymium quasi-resonant (QR-II™ series) PWM controller for offline flyback power converter applications. Built-in proprietary QR-II™ series technology with advanced protection features enhances the reliability and performance of the SMPS. In the SF5773S, the "digital anti-jitter" function automatically selects and locks the valley value under a given load, achieving audio noise-free operation. On the other hand, the "digital frequency jitter" function provides the system with superior EMI performance compared to traditional QR systems. The SF5773S is a multi-mode controller. At full load, the IC operates in CCM mode or QR mode depending on the AC line input. When the load becomes lighter, the IC enters "digital frequency foldback" mode to improve power conversion efficiency. When the output power is very small, the IC enters burst mode, achieving no-load power less than 100mW. The SF5773S integrates under-voltage lockout (UVLO), VCC over-voltage protection (OVP), output over-voltage protection (OVP), cycle-by-cycle current limit (OCP), pin float protection, over-load protection (OLP), AC power-down protection, soft-start, VCC clamping, gate clamping, and other functions and protections. In the SF5773S, protection functions are auto-recovery mode protection. The SF5773S is available in a SOT23-6 package.
Category：
- Product Description
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- Commodity name: SF5773S
- 封装: SOT23-6
- 品牌: Saiwei Technology
The SF5773S is a high-performance, 2-neodymium quasi-resonant (QR-II™ series) PWM controller for offline flyback power converter applications. Built-in proprietary QR-II™ series technology with advanced protection features enhances the reliability and performance of the SMPS. In the SF5773S, the "digital anti-jitter" function automatically selects and locks the valley value under a given load, achieving audio noise-free operation. On the other hand, the "digital frequency jitter" function provides the system with superior EMI performance compared to traditional QR systems. The SF5773S is a multi-mode controller. At full load, the IC operates in CCM mode or QR mode depending on the AC line input. When the load becomes lighter, the IC enters "digital frequency foldback" mode to improve power conversion efficiency. When the output power is very small, the IC enters burst mode, achieving no-load power less than 100mW. The SF5773S integrates under-voltage lockout (UVLO), VCC over-voltage protection (OVP), output over-voltage protection (OVP), cycle-by-cycle current limit (OCP), pin float protection, over-load protection (OLP), AC power-down protection, soft-start, VCC clamping, gate clamping, and other functions and protections. In the SF5773S, protection functions are auto-recovery mode protection. The SF5773S is available in a SOT23-6 package.
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