基于UC3844的24V/200W开关电源

24V/200W switching power supply based on UC3844

为了解决矿下大功率用电设备的持续供电问题,并且提高其工作稳定性和安全可靠性,将双管正激拓扑结构的开关电源应用到实际设备中。开展了相关可行性分析,指出了线性稳压电源和传统开关电源的不足,提出了基于UC3844的200W双管正激开关电源设计方法;对电路基本工作原理进行了分析验证,并增加了过流保护、过压保护等功能;对电路各功能进行了恶劣条件下的反复试验,对相关数据、波形进行了多次分析比较。研究结果表明,该电源安全可靠、稳定性好、纹波小、效率高,且满足国家标准,达到了设计要求。

Aiming at the power supplying problems of the high-power devices under mine, and in order to improve its stability and reliability, the double-ended forward switching power supply was investigated. After the analysis of relevant feasibility, the deficiencies of the linear power and traditional switching power supply were pointed out, the design method of double-ended forward switching power supply based on UC3844 was established. After the analysis of the circuit schematic, some special functions such as over overcurrent protection and over voltage protection were added to the circuit. The power supply was tested in the bad environment, the data and waveform were evaluated for many times. The experimental results indicate that the power supply can meet the national institute of standards and design requirements with the advantages of good stability, small ripple and high efficiency.