输入24V,输出12V,30A,DC-DC开关电源芯片,能够手工焊接的封装比如SSOP,大家谁有芯片方案给推荐下,谢谢!我通过TI软件查找到的有LM25119,但是封装是WQFN,难道大电流的只有这种封装?
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LM5176你好焊接吗?
http://www.ti.com/tool/PMP20991?keyMatch=null&tisearch=tidesigns-power
看看这个
his reference design is a 4-switch buck-boost controller utilizing the LM5176 for industrial applications. The PMP20991 reference design has a minimum operating input voltage of 9V and a maximum input voltage of 36V. The design is capable of sourcing 25A continuous current at 12Vout. Switching frequency is set to 250kHz. PMP20991 is assembled on SV601348A PCB.
Hi
webench选型,芯片并不全,你或者直接在DC/DC (外部开关)芯片list下选型: http://www.ti.com.cn/lsds/ti_zh/power-management/buck-controller-external-switch-products.page#p451max=25;420
设置输出电流大于25A, 在选一下封装/最大输入电压/最大输出电压等条件,剩下的芯片并不是很多,可以逐一挑选。
那就用LM5176吧
按照我给你发的链接。里面原理图,PCB,BOM都有了。
Hi
QFN封装用热风枪焊接比那些用烙铁焊接的其实还简单得多。
40057最大电流20A,电流再大,芯片的驱动能力不够,除非加驱动芯片
5176的话也可以,就是有点大材小用了
QFN封装焊接的话,只要在焊盘上涂些锡膏,然后摆放对其,热风枪一吹就好了,更容易焊接