Guru
Joined: 08/02/2015
Location: New ZealandPosts: 1138
| Posted: 11:53pm 23 Oct 2017 |
I recently ordered a couple of those cheap EGS002 driver boards for use in a small 24V inverter, they turned up yesterday, had a good look over one of them with a jewelers eye glass; located a few issues, that will require fixing before use.
1: Two pins on one of the IR2113S (not IR2110) mosfet drivers had distinct dry joints, pins were sitting almost dry above the tracks.
2: 12 Mhz Crystal can was touching top tracks running under it, pushed it a bit sideways to straighten.
3: Bootstrap caps one was tantalum, the other like a big chip type, these are extremely dodgy, tants are not suited for this application, same probably goes for the other; they need replacing with proper low esr electrolytics.
If this board was used, it would cause all sorts of issues, so it pays to check and I wonder how many of these inverter problems are caused by problems like this.
Cheers
Mike