Power via Ribbon Cable

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Hello All,

I am considering powering the gate drive circuit for my H-bridge via a ribbon cable. Has anyone been successful doing this before?

My design is a full-bridge converter, with an H-Bridge on each side. Each H-bridge is being laid out on its own PCB so that I can disconnect one of the H-bridges, and connect a rectifier or other such topologies.

I wanted to use the ribbon cable to combine the gate drive power with the digital signals. The gate drive consumes about 1 Amp, so I thought I could use 10 wires (5 V_15 and 5 GND), and use the remaining part for my I/O.

So, how bad of an idea is this?

Thanks
 

If seen this quite often with gate driver circuits, and also used it in own designs. Power supply shouldn't be a problem, but common mode
interferences with single ended control signals possibly are. Do you have optical isolated gate drivers or power/logic ground tied to the
DC bus?
 

FvM said:
Do you have optical isolated gate drivers or power/logic ground tied to the
DC bus?
Click to expand...

I do have optically isolated gate drivers, however, the emitters are not tied to the 15V bus. I have a seperate 3.3V bus so that my I/O can interface with a TMS320F2812.

Both the 15V and 3.3V are electrically isolated by means of V-Infinity VBSD1-SIP switching power supplies.
 

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