在阅读PDF文档时发现了一段话，原文如下：

It is a unique feature in InnoSwitch3-PD ICs that a designer can set

the switching frequency at full load between 25 kHz to 95 kHz

depending on the design specification. To have lower device

temperature, the switching frequency can be set to around 60 kHz.

To have smaller size transformer, the switching frequency needs to be

set to a value closer to a maximum of 95 kHz. When setting the full

load switching frequency, it is important to consider primary

inductance and peak current tolerances to ensure that average

switching frequency does not exceed 110 kHz which may trigger

auto-restart due to overload protection. The following table provides

a guide for frequency selection based on the device size. This

represents the best compromise between the overall device losses

(conduction and switching losses) based on size of the internal

high-voltage switch and transformer size.

大概意思是说在效率和体积之间折衷选择60K，最大频率不建议超过110K，因为频率高了会触发保护，

这样一来，我需要在200K附近工作的可能性是几乎没有了。

再多问一句，能不能屏蔽掉频率过高保护的这个功能？

200k的话是不是需要性能更高的芯片。

新入行的菜鸟  路过

为了实现先进的USB电源协议，除了反激式控制器外，设计工程师还需要使用专用的USB控制器或微控制器。这两个IC之间还需要低时延通信，

是的，如果这颗芯片频率不能外部调整的话，只能选其他方案了。

这个不需要了。芯片内部就有协议部分。直接对接手机或其他设备的通讯的。无需第三方通讯协议芯片。

就是看中这个芯片的特色才选的。没想到频率拉跨了。