基于iW1706反激式开关电源的设计  

Design of flyback switch power supply based on iW1706

作　　者：付贤松[1,2,3] 刘雅楠[4,2] 桑若愚 张金健[4,2] 牛萍娟[1,2,3] 

机构地区：[1]天津工业大学电气工程与自动化学院,天津300387 [2]天津工业大学大功率半导体照明应用系统教育部工程研究中心,天津300387 [3]天津工业大学电工电能新技术天津市重点实验室,天津300387 [4]天津工业大学电子与信息工程学院,天津300387

出　　处：《电源技术》2015年第3期594-596,共3页Chinese Journal of Power Sources

摘　　要：基于芯片i W1706设计了一款反激式开关电源,用于驱动LED。i W1706是一种高性能AC/DC离线电源控制器,利用初级侧感测技术和准谐振操作,提供了过压、过流保护。阐述了该芯片的工作原理及特点,基于i W1706设计出一款具有宽电压范围输入（AC 85~265 V）、输出电流恒定在330 m A、输出功率为5 W的开关稳压电源。给出了变压器的设计过程及主要元件参数的计算方法。实验结果验证了该设计的正确性,电路中使用了较少的元件,达到了稳定的电流输出。Flyback switch power supply was designed based on i W1706 and used to drive LED. i W1706 was a high performance AC/DC off-line power supply controller. The primary side sensing and quasi resonant operation were used, and the over voltage, over current protection were provided. The main feature and principle of i W1706 were introduced. A switch power supply of the wide voltage range input（AC 85~265 V）, the output current of constant330 m A, the rated power of 5 W was designed basing on i W1706. The transformer design and calculation of main parameters were given. The experimental results demonstrate the feasibility of the design, fewer components in the circuit is used and a stable current output is achieved.

关 键 词：开关电源 iW1706 准谐振 反激式 

分 类 号：TM571[电气工程—电器]