主板提供给4PIN风扇的pwm信号频率是多少?

wsy2220 · 发表于 2012-5-31 22:46

本帖最后由 wsy2220 于 2012-5-31 22:49 编辑

想自己DIY一个调速器,希望有知道的告诉一下

royalk · 发表于 2012-5-31 22:56

2.4  PWM Control Input Signal
The following requirements are measured at the PWM (control) pin of the fan cable connector:
PWM Frequency: Target frequency 25 kHz, acceptable operational range 21 kHz to 28 kHz
Maximum voltage for logic low:  VIL = 0.8 V
Absolute maximum current sourced:  Imax = 5 mA (short circuit current)
Absolute maximum voltage level:  VMax = 5.25 V (open circuit voltage)

摘自Intel的PWM specification，不过是很古老的版本

wsy2220 · 发表于 2012-6-1 00:28

royalk 发表于 2012-5-31 22:56
2.4 PWM Control Input Signal
The following requirements are measured at the PWM (control) pin of t ...

谢谢，这就够了