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TPS55340带负载能力不足

Other Parts Discussed in Thread: TPS55340

利用标准电路,进行TPS55340设计好后,在3V供电,空载时,输出是24V,但是加8W负载,输出变为3V多一点了。通过变大FREQ引脚的电阻更改频率,可改善到带动4W负载,输出电压为24V,但是很难实现带8W负载,24V输出,有哪些途径能实现(比如更改电阻,电感大小)让3V和22V供电,输出稳定为24V,且能带8W负载啊?