- All
- Product Management
- News
- Introduction
- Corporate Outlets
- FAQ
- Corporate Video
- Corporate Brochure
SF5897
The SF5897 is a high-performance, 2-neodymium quasi-resonant (QR-II™ series) PWM controller for offline flyback power converter applications. Built-in proprietary high-voltage-milliwatt™ series technology and QR-II™ series technology with advanced protection features enhance the reliability and performance of the SMPS. The SF5897 can shut down the FPC power supply to achieve higher efficiency at light loads. The "digital anti-jitter" function in the SF5897 automatically selects and locks the valley value under a given load, enabling 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 SF5897 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 ultra-low standby power consumption. The SF5897 integrates under-voltage lockout (UVLO), VDD over-voltage protection (VDD OVP), output over-voltage protection (output OVP), cycle-by-cycle current limit (OCP), pin float protection, overload protection (OLP), soft start, VDD clamping, gate clamping, and other functions and protections. In the SF5897, VDD OVP and output OVP are latch-mode protections, while other protections are auto-recovery mode. The SF5897 is available in an SOP8 package.
Category：
- Product Description
-
- Commodity name: SF5897
- 封装: SOP-8
- 品牌: Saiwei Technology
The SF5897 is a high-performance, 2-neodymium quasi-resonant (QR-II™ series) PWM controller for offline flyback power converter applications. Built-in proprietary high-voltage-milliwatt™ series technology and QR-II™ series technology with advanced protection features enhance the reliability and performance of the SMPS. The SF5897 can shut down the FPC power supply to achieve higher efficiency at light loads. The "digital anti-jitter" function in the SF5897 automatically selects and locks the valley value under a given load, enabling 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 SF5897 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 ultra-low standby power consumption. The SF5897 integrates under-voltage lockout (UVLO), VDD over-voltage protection (VDD OVP), output over-voltage protection (output OVP), cycle-by-cycle current limit (OCP), pin float protection, overload protection (OLP), soft start, VDD clamping, gate clamping, and other functions and protections. In the SF5897, VDD OVP and output OVP are latch-mode protections, while other protections are auto-recovery mode. The SF5897 is available in an SOP8 package.
Product Message
Please fill in the information accurately, and we will reply to you within 24 hours.
Official Account
E-mail：
Company Address：
Room 819, Dongmei Building, Xiangnan Three District, Minqiang Community, Minzhi Street, Longhua District, Shenzhen
