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SF5877
The SF5877 is a high-performance, 2-neodymium quasi-resonant (QR-IITM series) PWM controller for offline flyback power converter applications. Built-in proprietary high-voltage-milliwatt TM series technology and QR-II type TM series technology with advanced protection features improve the reliability and performance of the SMPS. The "digital anti-jitter" function in the SF5877 automatically selects and locks the valley value under a given load, achieving noise-free audio operation. On the other hand, the "digital frequency jitter" function gives the system superior EMI performance compared to traditional QR systems. The SF5877 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 a no-load power of less than 50mW. The SF5877 integrates functions and protections such as undervoltage lockout (UVLO), VDD overvoltage protection (VDD OVP), output overvoltage protection (Output OVP), overtemperature protection (OTP), cycle-by-cycle current limit (OCP), pin float protection, overload protection (OLP), soft start, VCC clamping, and gate clamping. In the SF5877, VDD OVP and output OVP are latch-mode protections, while other protections are auto-recovery mode. The SF5877 is available in an SOP8 package.
Category：
- Product Description
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- Commodity name: SF5877
- 封装: SOP-8
- 品牌: Saiwei Technology
The SF5877 is a high-performance, 2-neodymium quasi-resonant (QR-IITM series) PWM controller for offline flyback power converter applications. Built-in proprietary high-voltage-milliwatt TM series technology and QR-II type TM series technology with advanced protection features improve the reliability and performance of the SMPS. The "digital anti-jitter" function in the SF5877 automatically selects and locks the valley value under a given load, achieving noise-free audio operation. On the other hand, the "digital frequency jitter" function gives the system superior EMI performance compared to traditional QR systems. The SF5877 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 a no-load power of less than 50mW. The SF5877 integrates functions and protections such as undervoltage lockout (UVLO), VDD overvoltage protection (VDD OVP), output overvoltage protection (Output OVP), overtemperature protection (OTP), cycle-by-cycle current limit (OCP), pin float protection, overload protection (OLP), soft start, VCC clamping, and gate clamping. In the SF5877, VDD OVP and output OVP are latch-mode protections, while other protections are auto-recovery mode. The SF5877 is available in an SOP8 package.
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