As we all know, the PWM interface can adjust the fan speed, then can multiple fans be connected in parallel to one PWM interface?

First of all, connecting multiple fans in parallel may increase the total current demand. Make sure that the selected PWM interface can provide enough current to drive all connected fans to avoid overloading or damaging the equipment.

Secondly, some fans may not support parallel control by a single PWM interface, so when selecting a fan, you should consider the compatibility of the fan to ensure that multiple fans can be controlled simultaneously through PWM signals.

In addition, if you want to connect multiple fans in parallel to the same PWM interface, you may need appropriate circuit design to ensure the quality and stability of the PWM signal and avoid signal attenuation or interference. In addition, the speeds of parallel fans may not be completely synchronized, which may cause noise or uneven cooling. When adjusting fan speed, you need to keep an eye on this and calibrate it appropriately.

In theory, it is possible to connect multiple cooling fans in parallel to a PWM interface, but in practice, the above factors still need to be carefully considered to ensure stable and effective operation.