Power management chips play a crucial role in electronic devices, mainly including the following aspects: power management and conversion; power supply fault protection; battery charging control; energy saving.

Hall devices are solid-state electronic devices that utilize the Hall effect. Hall sensing circuits include four types: HALL, AMR, GMR, and TMR. The products include Hall switches, linear Hall circuit, magnetic encoders, 2D Hall switches, 3D Hall switches, etc.

It refers to electronic components used to control motors, which can convert external input control signals into the current and voltage required for motor drive, thereby controlling the speed, direction, and torque of the motor.

MCU is the abbreviation for microcontroller unit, also known as microcontroller.

A communication protocol chip is an integrated circuit used to achieve communication between different devices.

The human pyroelectric infrared sensor is based on the pyroelectric effect. When the human body emits infrared radiation, the piezoelectric ceramic material inside the sensor releases charges due to temperature changes, which are converted into voltage output through an amplifier. Specifically, in the absence of infrared radiation, the surface charge of the sensor is in a neutral state and there is no output; When there is infrared radiation (such as human body radiation), the temperature of the sensor rises, causing a decrease in charge and releasing a portion of the charge. These charges are processed by an amplifier and output as a voltage signal.

Human pyroelectric infrared sensors are widely used in infrared fields such as anti-theft alarms, visitor notifications, and non-contact switches. For example, in anti-theft alarm systems, when a human body approaches, the sensor will detect infrared radiation and output a signal, triggering the alarm system. In addition, the sensor can also be used for flame detection in smart firefighting, by receiving infrared information from flame combustion radiation and converting it into voltage signals.

The electronic cigarette microphone chip is an integrated circuit designed specifically for electronic cigarettes, mainly used to control and detect the working status of electronic cigarettes.

The 555 timer is an integrated circuit chip commonly used in timers, pulse generators, and oscillation circuits