Re: Layout advices for an ir2110
- From: "PeteS" <PeterSmith1954@xxxxxxxxxxxxxx>
- Date: 12 Aug 2006 12:33:12 -0700
Eeyore wrote:
overedu@xxxxxxxxx wrote:
Hi, I'm designing an inverter and now i'm going to design the pcb for
the ir2110 driver and the IGBT's, the characteristics will be, a max
voltage rail of 400V and a maximum current of 40A. I have been reading
the application notes of IR (AN-978) and some more stuff, and the
things that i got clear are, use direct and thick tracks, put the
capacitors for decoupling as close as it possible to the ir2110,
connect the drain of the high side device near to the low side device
to reduce the possible inductance/impedance, connect the igbt's near to
the ir2110, put a capacitor between the drain of the high side device
and the source of the low side device to reduce the inductance. What
other things do i have to considare to obtain a good pcb layout?.
I will use copper bars to carry the current, do i need to considare
anything special with the copper bars?, to calculate the widht and the
thick for the copper bar i have used this calculator
http://www.desmith.net/NMdS/Electronics/TraceWidth.html, can i trust in
the results of the calculator?. Thanks so much in advance.
To keep the inductance low for the gate drive you want to minimise the *loop
area* involved.
Graham
and don't run any control signals near or under the high current paths.
Cheers
PeteS
.
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