Touch chip used in smart touch remote control

Intelligent touch remote control switch circuit The right side of the dotted line is the general lighting circuit, and the left side is the electronic switch part.VD1_{VD4, VS form the main circuit of the switch, and IC forms the switch control circuit.Usually, VS is in the off state and the light does not light up.VD1}VD4 outputs 220V pulsating DC power, which is limited by R5, stabilized by VD5, and filtered by C2 to output about 12V DC power for IV use.

The principle of smart touch remote control switch is: the human body is charged and the mains is the sameWhen the human body touches the touch pad, it becomes the standard MOS level through the clipping, amplification and shaping of the input buffer stage.When the touch duration is greater than 32 milliseconds and less than 332 milliseconds, the control circuit of the control logic part is in a switch working state.When the touch duration is greater than 332 milliseconds, the control logic part of the control circuit is in a dimming working state, and the phase angle of the output trigger pulse changes continuously and periodically between 41° and 159°, and is divided into fast and slow according to the perception of the human eye.and pause three processes.When the touch is over, the brightness memory will memorize the phase angle at that time. If a touch longer than 32 milliseconds and less than 332 milliseconds is applied again, when the circuit is in the off state, the phase angle will be memorized by this part to ensure that the circuit is in the next on state., keep the original selected phase angle, and the light source maintains the original brightness.The synchronization between the trigger pulse and the commercial power is guaranteed by the phase-locked loop, and the working clock of the circuit is also generated by it.At the same time, the circuit also has the function of remote control (ie remote trigger) and gradual sleep (ie from bright to dark, and finally closed) function, the duration of which is set by the external circuit.
The capacitive touch chip integrates a high-resolution touch detection module and a dedicated signal processing circuit to ensure that the capacitive touch chip has a sensitive automatic identification and tracking function to environmental changes.Capacitive touch chips must also meet the user's high experience requirements for stability, sensitivity, power consumption, response speed, waterproof, water-operated, anti-vibration, and anti-electromagnetic interference in complex applications.In order to facilitate the user to independently control the sensitivity of the touch keys in the application, the capacitive touch chip also sets a sensitivity control bit.