过电压保护功能

 过电压保护功能操作的波形示例
过电压保护功能操作的波形示例

负载开关IC的过电压保护功能旨在当输入电压超过过电压保护阈值电压时,通过关闭输出,对集成电路和后续级电路进行保护。它也被称为过电压保护(OVP)或过电压锁定(OVLO)。

当输入电压VIN升高并超过过电压保护阈值VOLV-RI时,通过关闭负载开关内的MOSFET关闭输出电压。之后,当VIN下降或当过电压保护阈值下降而变为VULV-FA或降低时,输出自动恢复并打开。由于阈值是滞后的,因此可以防止阈值周围的抖动(重复的开/关操作)。

负载开关IC内置过电压保护功能

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