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TPS40210升压,带负载能力不够

Other Parts Discussed in Thread: PMP7327

TI工程师,你们好,请教问题。

参考PMP7327号DEMO板做出的升压板,带不动负载,DEMO上标称,输入电压12-24V,输出26V,输出10A,现在实际输出达不到,我的负载为TPA3116的D类功放两片,动态很大的时候,电压降到与输入电压一样,为12V,看供电电源的电流表,实际电流5A左右,

(我的测试电源为12V30A直流电源,使用10平方的纯铜线接至电源端,用指针式电压表测试电源输入端,只有轻微的电压波动,排除电流不足的问题)

图1    PCB走线

附件为原理图,


DT-020-10.pdf