【应用】国产慢熔保险丝SF303A.250助力27W座充电源输入过流防护,满足小型化设计需求
假如不考虑电源转化因素,27W座充电源输入功率也要达到27W,输入电源电流为27W/220V≈0.12A,为避免因负载短路异常造成座充燃烧风险,一般需要在其电源输入加一颗慢熔保险丝做过流保护设计,市面上一般选择250Vac/0.25A慢断保险丝,可满足2倍过流防护,同时考虑空间结构限制,选择小尺寸表贴封装保险丝设计。
针对如上的设计需求,推荐选择电安科技(DA Technology)慢熔保险丝SF303A.250,2410表贴封装,最大额定工作电压250Vac,额定工作电流0.25A,分断电流能力达50A,工作温度范围-55℃~125℃,典型电性参数参考如下图1所示。
图1:电安科技(DA Technology)慢熔保险丝SF303A.250典型电性参数
推荐理由如下:
1、 宽工作温度范围:-55~125℃,具有出色的高低温环境下过流防护能力;
2、 采用2410表贴封装,典型封装尺寸6.1x2.5mm,满足小型化设计需求;
3、 市面上有成熟的应用,产品性能得到验证;
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