As a very common watch product, smart wearable watch has the functions of health monitoring, exercise monitoring, sleep monitoring, daily convenience, event management and location, intelligent interconnection and so on, which greatly enriches the life experience of users. What kind of discrete device products do smart watches need to realize these functions?

Discrete devices have many functions in smart wearable watches, including switch, current control and power management, which can help products to achieve multiple functions. The products that may be used in smart watches include resistors, capacitors, inductors, diodes, triodes, MOS tubes, relays, fuses, optocouplers, crystal oscillators, sensors, LEDs, MCU and power chips. The working principle of smart wearable watches mainly depends on the built-in sensors to collect the user's sports and physiological data, and process and analyze these data through algorithms, and finally show them to users in the form of graphics or words. Smart wearable watches include sensing module, processing module, control module, transmission module, audio processing module, display module and power module.

There are three main parts in the application of discrete devices in smart wearable watches:

First, power management

The battery and charging circuit in smart wearable watches usually need MOS tube for voltage condition and protection to ensure that the power supply can be cut off safely in case of short circuit or overload. The power management chip is used to charge and discharge the battery of the watch to ensure the low-power operation of the equipment. Power management IC and lithium battery protection IC are indispensable components in smart wearable watches. In the power filter circuit, MOS and inductor form a filter circuit to ensure the voltage stability inside the watch.

Second, signal processing

In smart wearable watches, resistors are widely used in various circuits to achieve accurate current and voltage control. Capacitive touch screens need to use capacitors to sense the touch operation of users, and diodes are often used in power supply circuits and signal processing circuits. Transistors are often used as amplifiers of audio signals, and MOS is widely used in circuits such as drivers, switches and power supplies.

Third, the Internet of Things communication, audio and driving circuits

Optocouplers are used to isolate and transmit electrical signals and ensure the independence and safety between circuits. As a voltage-controlled device, MOS transistor is often used in switching circuits. In smart wearable watches, MOS tubes can be used to control the power supply of various sensors to achieve low-power sensor management. In addition, in the understanding and driving of LED screen brightness, MOS tube is used to realize remote control and automatic control of the circuit.

As a professional manufacturer of discrete devices, Heketai is deeply involved in the wearable market, and its products have the characteristics of miniaturization and low power consumption. The products widely used in watches include MOS transistor SI2300, triode MMBT3904, diode SS26L and BZT52B5V1, etc. Take SI2300 as an example, it has good electrical characteristics, adopts SOT-23 package form, is packaged in patches, is easy to weld, is small in size and very lightweight, and is suitable for applications requiring compact design, such as portable devices, small Internet of Things devices and wearable smart watches. The product has very good reliability and stability.

The quality of discrete components directly affects the performance of smart wearable watches, and good discrete components need good stability and reliability. Using appropriate discrete devices can optimize the circuit design of the watch, improve the power consumption efficiency of the watch, and improve the overall performance and user experience of the watch.