VIPER22-LED-EV データシートの表示（PDF） - STMicroelectronics

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コンポーネント説明

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VIPER22-LED-EV

Low power OFF-line SMPS primary switcher

STMicroelectronics 

Operations

VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E

4.5

Overvoltage threshold

An overvoltage detector on the VDD pin allows the VIPer22A to reset itself when VDD

exceeds VDDovp. This is illustrated in Figure 8. which shows the whole sequence of an

overvoltage event. Note that this event is only latched for the time needed by VDD to reach

VDDoff, and then the device resumes normal operation automatically.

Figure 8. Overvoltage sequence

VDD

VDDovp

VDDon

VDDoff

t

VDS

t

12/21

Doc ID 12050 Rev 2

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