The core components and functions of the PCBA of neck hanging fan can be summarized as follows:

I. Main component modules

i. Power management module

Powered by lithium batteries (such as 3.7V, 2.77Wh capacity), supporting Type-C interface charging (800mA ± 200mA).

It has overcharge/overdischarge protection and low battery flashing prompt (shutdown after 5 times) function.

ii. Control module

• MCU chip: such as EN8F5113 or EN51 series, responsible for motor control, gear switching, and digital display.

• Input interface: includes buttons (short press to switch 0-3 gears) and touch sensing elements (for operation).

iii. Motor drive module

Contains power amplifier, current sampling circuit, and comparator for controlling motor speed and direction.

Some schemes use brushless motors and support multi gear wind speed adjustment.

iv. Protection circuit

Implement over temperature and short circuit protection to ensure safe operation of equipment.

II. Functional Features

i. Multi speed regulation: Implement 0-3 wind cycle switching through MCU.

ii. Intelligent control: supports remote control and mobile APP remote control (some high-end solutions).

iii. Low power design: Low energy consumption during standby, extending battery life.

III. Application scenarios

Suitable for wireless hanging neck fans, it has the characteristics of lightweight, high comfort, and soft wind power.

Some solutions support digital display of battery level and charging status.