FAN6751 Overview
Description
This application note describes a detailed design strategy for a high-efficiency, compact flyback converter. Design considerations and mathematical equations are presented as well as guidelines for a printed circuit board layout.
Key Features
- to enhance the performance for LCDM/TV, NB, and adapters
- The green-mode function includes off-time modulation and burst mode to reduce the PWM frequency at light-load and in no-load conditions
- To avoid acoustic noise problems, the minimum PWM frequency is set above 18KHz
- This greenmode function enables the power supply to meet international power conservation requirements
- With the internal high-voltage startup circuitry, the power loss due to bleeding resistors is also eliminated
- Built-in synchronized slope compensation achieves stable peak-current-mode control
- The proprietary external line compensation ensures constant output power limit over a wide AC input voltage range, from 90VAC to 264VAC
