Touch switch chip principle and functional characteristics

卓联微科技

Touch switch chip principle and functional characteristics [Copy link]

Touch switch is a new product developed with the development of science and technology. It refers to a wall switch designed with the principle of touch sensing chip, which is a replacement product of traditional mechanical button wall switch. Touch switch, which can achieve more intelligent and convenient operation, has incomparable advantages over traditional switches and is a very popular decorative switch in home and office products.

　　Touch switch principle

　　The basic principle is that the human body is charged at the same frequency as the mains. When the human body touches or touches a switch, the power is clipped, amplified, and shaped at the input buffer stage to become a standard MOS level.

　　When the touch duration is greater than 32 milliseconds and less than 332 milliseconds, the control logic part controls the circuit in a switching state. When the touch duration is greater than 332 milliseconds, the control logic part controls the circuit in a dimming state, and the output trigger pulse phase angle changes continuously between 41° and 159°, and is divided into three processes: fast, slow and pause according to the sensitivity of the human eye.

　　When the touch ends, the brightness memory memorizes the phase angle at that time. If a touch greater than 32 milliseconds and less than 332 milliseconds is applied again, when the circuit is in the off state, the phase angle is still memorized by this part, ensuring that the circuit maintains the original selected phase angle and the light source maintains the original brightness when it is turned on next time. The synchronization of the trigger pulse and the mains is ensured by the phase-locked loop, which also generates the working clock of the circuit. At the same time, the circuit also has remote control (i.e. remote trigger) function and gradual sleep (i.e. from bright to dark, and finally off) function, and its duration is set by the external circuit.

　　Advantages of touch switches over traditional switches

　　Touch switch, low noise, long life. With backlight, and good anti-leakage effect. Convenient touch switch is quite good.

　　Touch switch features

　　1. Widely applicable lamps: It can be connected to common lamps such as fluorescent lamps, energy-saving lamps, incandescent lamps, spotlights, halogen lamps, etc. It is not picky about lamps. It does not need to add compensation capacitors when connecting fluorescent lamps and energy-saving lamps, and there is no flicker.

　　2. Lightning protection design----Equipped with lightning protection function, the performance is safe and reliable.

　　3. One switch, multiple identifications - a multi-button remote control can centrally control the smart remote control switches of the whole home. The switch can learn to identify any remote control in the product. The switch and remote control do not need to be purchased as a set. Users can freely choose, upgrade, add and configure them at will.

　　4. Easy to install----The standard 86-type wall switch design does not require a neutral wire or any changes to the lamp's accessories. It can directly replace the original wall switch and can be installed by any ordinary electrician.

　　5. Two-way control: it can be controlled by wall control, remote control, or touch screen wall remote control, which is more convenient to use.

　　6. Unique contact code matching method, stronger anti-interference ability.

　　7. Ultra-low power consumption design, standby power consumption: less than 0.011W, calculated according to the formula of 1 kWh = 1 kilowatt-hour: annual power consumption = (0.011W × 24 hours × 365 days) ÷ 1 kilowatt-hour = 0.096 kWh (less than 1 kWh in 10 years).