Whether the PWM of multiple cooling fans can share the same interface

Under normal circumstances, multiple Cooling Fans can be connected in parallel to a PWM (pulse width modulation) interface. However, several critical factors must be considered to ensure stable and effective operation:

1. Current Requirements: Connecting multiple fans in parallel may significantly increase the total current demand. It is essential to verify that the selected PWM interface can supply sufficient current to drive all connected fans without risking overload or damage to the device.

2. Fan Model Compatibility: Not all fans are compatible with parallel control via a single PWM interface. When selecting fans, it is crucial to consider their compatibility to ensure simultaneous control through PWM signals.

3. Circuit Design: To connect multiple fans to the same PWM interface, an appropriate circuit design may be necessary. This could include the use of amplifiers or distributors to maintain the quality and stability of the PWM signal, preventing signal attenuation or interference.

4. Speed Synchronization and Control: The speed of parallel-connected fans may not be fully synchronized, potentially leading to noise or uneven cooling effects. Proper calibration should be performed when adjusting fan speeds to address this issue.

While theoretically feasible, connecting multiple cooling fans to a single PWM interface requires careful consideration of the aforementioned factors. We recommend thoroughly reviewing the manufacturer's guidelines for each fan and PWM controller, consulting relevant documentation and specification sheets, and seeking professional advice if needed.