This application note presents the design guidelines of a single-stage boost converter for LED lighting application. The design utilizes FAN7530, which is a fixed-conduction-time CRM PFC controller with zero-current-detection, valley switching, MOSFET over-current protection, low start-up current (40μA) and low operating current (1.5mA).
This technical application note describes the design of a 75W single-stage flyback AC-DC converter suitable for LED lighting. The document focuses on the use of the FAN7530, which is a fixed-on-time CRM PFC controller integrated with CVCC mode feedback circuitry, zero-current detection, and MOSFET overcurrent protection. This manual is written in Chinese.
| Output Power | 75W |
|---|---|
| Input Voltage Range | 85-265VAc |
| Output Voltage | 45V |
| Output Limit Voltage | 50V |
| Minimum Switching Frequency | 50kHz |
It acts as a fixed-on-time CRM PFC controller with zero-current detection and MOSFET overcurrent protection.
The document recommends selecting an N-channel enhancement mode MOSFET with specifications greater than LOPF8N8OG (800V, 8A).
An Ultra-Fast Rectifier Diode (UFRD) model F06UP20S (200V, 6A) is selected.