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LM5175: 问题描述如下:

Part Number: LM5175
Other Parts Discussed in Thread: LM5176, TPS43060, LM5121

设计目标:输入9-14V,输出24V,6A

存在问题:实测输入11V,100mA,不带负载,输入电源被拉低到6.5V左右,电源显示恒流(无法正常升压)

设计原理和测试波形如下,请紧急帮忙处理,谢谢

1.设计原理图如下:

2.测试电感出的显示值如下

3.测试Q7控制引脚波形如下:

4.测试Q6控制引脚波形如下: