同步整流BOOST型DC／DC软启动电路

更新时间：2020-10-22 03:01:30 大小：853K 上传用户：gsy幸运查看TA发布的资源 标签：同步整流 boost 软启动 下载积分：1分评价赚积分（如何评价?）收藏评论(0) 举报

资料介绍

针对开关电源启动中出现浪涌电流的问题，设计了一种通过控制电流的方式来实现升压电路中的软启动电路，避免了在切入正常调制时出现较大过冲的现象。通过仿真，所设计的5VBOOsT同步整流DC／DC电路输出电压曲线平滑稳定，未在启动阶段出现浪涌电流和结束后的较大过冲电压。通过对0．5μm 5V CMOS工艺流片后的电路测试，结果证明利用该设计，5V升压电路实现了预期的软启动作用，并可灵活应用在其他DC／DC类开关电源管理芯片中。

For switch power surge current problems appear in the start, we design a control current ways to boost circuit to realize the soft start circuit, avoided in there is greater than rush into normal modulation. Through simulation, the output voltage curve of BOOST 5 V synchronous rectification DC/DC circuit is smooth and stable, and the surge current and the overshoot voltage are not at the start stage. Based on the circuit test after 0.5 μm 5 V CMOS process flow sheet. The results show that using the design, the 5 V voltage booster circuit can realize the soft start is expected. And can be flexible used in other similar DC/DC switching power management chip.