PT2102 dimming control ASIC
Source: InternetPublisher:Lemontree Keywords: Application specific integrated circuit light control Updated: 2020/10/17
The 220V AC power is stepped down by resistor Rl, rectified by VDI, stabilized by VD2 and filtered by c5 to output a DC voltage of about 9V for
power consumption of the integrated block. R3 inputs the AC synchronization signal for the integrated block, and VD3 and VD4 are used to prevent the input of too high a touch
signal from damaging the integrated block . Every time a human hand touches the electrode sheet M, the brightness of the light changes by one level. With repeated touches,
the brightness of the light changes in a cycle of "weak light, medium light, strong light, off, weak light...".
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