The principle of patch touch switch is that its internal structure is achieved by the force of metal springs to activate. When in use, gently pressing the switch button can turn on the switch, and when the hand is released, the switch can be turned off. The relationship with people's work and life is becoming increasingly close, and electronic devices cannot do without reliable power supply.

SMD touch switch power supply is a type of power supply that utilizes modern power electronics technology to control the time ratio of switching transistors on and off, maintaining a stable output voltage. The switch power supply is generally composed of pulse width modulation (PWM) control IC and MOSFET.

Features of SMD touch switches

1. The switch sound is clear and crisp, with excellent tactile and rhythmic sensation.

2. The switch size is relatively small and the product meets the RoHS standard for environmental protection.

3. The product may undergo ultrasonic, echo welding, or wave soldering processes..

4. Equipped with various external dimensions, the switch sound is crisp, and the feel and rhythm are excellent.

5. There are SPDT and DPDT options for switch contact modes.

6. Multiple patch lengths can be designed, with both normally closed and normally open designs.

Basic electrical parameters and welding process of SMD touch switches

一、 Product specifications:

1. Rated voltage: maximum 24V

2. Rated current for infrequent switching of switches: maximum 400mA

3. Rated current for frequent switching of switches: maximum 150mA

4. Insulation impedance: minimum 100m

二、Mechanical properties:

1. Electrical life: 10000 times

2. Operating force: 100gf-350gf

3. Operating temperature: -20 ℃~+70 ℃

三、Welding and cleaning process:

1. Hand welding: The temperature is controlled at 200 ℃, and the welding time is about 10 seconds

2. Wave welding: The temperature is controlled at 230 ℃, and the welding time is about 2 seconds