Hi,
The FET is a very low Vgs turn-on with 27mOhm @ 2.5v. Apparently.
I have 5.5v connected to the drain, a capacitor over the source and a voltmeter over that.
I connect 0v to the gate. Voltmeter measures 0v.
I connect 3.3v to the gate. Voltmeter measures 2.6v.
I connect 5.5v to the gate. Voltmeter measures 4.8v.
So it looks like the Vgs is considerably higher than the datasheet spec. I've verified the component code and I'm in the process of validating with RS Components (UK) the fets were sourced directly. Any other ideas?
Oh, I've tried 5 of them so far!
The last one I pressed into the place thinking perhaps they are damaged by soldering heat.
https://www.tme.eu/hu/Document/d468925bfe2879f649e8ee0ff5de94a0/irlml6244pbf.pdf
Cheers!
Andrew
The FET is a very low Vgs turn-on with 27mOhm @ 2.5v. Apparently.
I have 5.5v connected to the drain, a capacitor over the source and a voltmeter over that.
I connect 0v to the gate. Voltmeter measures 0v.
I connect 3.3v to the gate. Voltmeter measures 2.6v.
I connect 5.5v to the gate. Voltmeter measures 4.8v.
So it looks like the Vgs is considerably higher than the datasheet spec. I've verified the component code and I'm in the process of validating with RS Components (UK) the fets were sourced directly. Any other ideas?
Oh, I've tried 5 of them so far!
The last one I pressed into the place thinking perhaps they are damaged by soldering heat.
https://www.tme.eu/hu/Document/d468925bfe2879f649e8ee0ff5de94a0/irlml6244pbf.pdf
Cheers!
Andrew