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Shock resistant soft start constant current LED lighting circuit
Source: InternetPublisher:抄写员 Keywords: Constant current soft start LED lighting Updated: 2021/12/19
Circuit working principle: The circuit consists of three parts : soft start, anti-shock and constant current
. The soft start circuit is composed of VT2, R3, C3, etc. When the power is just turned on, C3 is equivalent
to a short circuit. The power goes through R3, the be junction of VT2, and C3 to the ground. VT2 is saturated and conducts, and point A
is pulled to a low potential. VT. Because there is no base current and it is cut off, the LED does not emit light.
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