同步整流BOOST型DC/DC软启动电路  

Synchronous Rectification DC/DC BOOST Soft Start Circuit

作　　者：李良 来鹏飞 曹发兵 陈峰 

机构地区：[1]无锡中微爱芯电子有限公司,江苏无锡214072

出　　处：《电子与封装》2016年第1期21-24,30,共5页Electronics & Packaging

摘　　要：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5 V BOOST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 5 V CMOS工艺流片后的电路测试,结果证明利用该设计,5 V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同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.

关 键 词：软启动电路 浪涌电流 DC/DC开关电源 BOOST 5 V CMOS工艺 

分 类 号：TN402[电子电信—微电子学与固体电子学]