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24V转正负12V问题?+12V/5A,-12V/1A。

Other Parts Discussed in Thread: TPS54331, TPS5450, TPS54140, TPS54160

我的想法是,

+12V,做个不隔离的降压开关型DC/DC,比如TPS54331搭一个(电流不够就并联),实现24V到12V。

-12V,做个隔离的DC/DC,实现24V到12V,然后两个12V串联,构成正负12V。

有没更简洁成熟的IC方案?