Hi All

Until now, my circuit has been powering a 12V FAN, with a PWM signal generally 5V or open collect. I need to use the following FAN (attached datasheet). The PWM control wire for this FAN is not internally pulled up, so it would need a voltage of 10V for full speed. Otherwise, it's simply switched off.

My simple circuit, which has been working till now(For my previous fan), is the following but only provides a 5V PWM signal. I have used a Zener diode with a 3K resistor to create a 5V signal. But now, as I need a 10V signal voltage(max), is its best to simply remove the Zener diode?

Otherwise this current circuit I am getting a max of 5V applied to this control line.



Thanks

 

That fan works on 12Vto 24V, so just take the Zener off.

 

That fan works on 12Vto 24V, so just take the Zener off, or better still use a pnp transistor to drive it.

Thanks, I am using the 12V version. For now, I will remove the zener, and maybe improve the circuit in the next PCB revision.

 

I see the yellow wire as PWM/ 0-10 volts DC Does that mean that some versions have a 0-10 control while others have P{WM, or does it mean that either works??

 

Well, I think it's 0-10V, but if you was to use a PWM signal it would simulate a voltage.I might be wrong.

My PWM signal is 0 to 5V, and even at full duty, I am just getting 50% of the max speed.