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?