http://www.cirmall.com/circuit/10893/直流过压保护电路#/details
http://www.360doc.com/content/18/0110/11/21923670_720732097.shtml
http://www.eefocus.com/analog-power/424178
目前遇到的情况是：单板12V输入，经常会误插48V电源适配器
转载于:https://www.cnblogs.com/gym-2017/p/10077635.html
相关资源：一种简单的防反接防过压电路.pdf
