2019-04-11 01:54 AM
Hi. I designed the power conversion circuit with A6986.
After soldering of this pcb, I powered 24V on power line.
And the VIN pin(#15) was damaged.
I have no idea what is the problem.
when I design the circuit, I consulted the manual, and eval. board circuit.
Please some body help me.
Thank you
2019-04-14 06:47 AM
Are your two grounds definitely connected together ?
How do you know it is the VIN pin that is damaged ?
2019-04-14 03:47 PM
Thanks for answering me.
The GNDs are definitely connected together.
And I saw the VIN pin exploded when I powered the 24VDC on power line.
2019-04-14 03:51 PM
C78 backwards ?
2019-04-14 05:43 PM
Thanks for answering me.
I checked it. But It's on right state.
The new uploaded file is another circuit that mine of using a6986, and this circuit
has VIN problem too..
I've tested a 4.7uF Al. cap. add on the C91, and VIN was not exploded, and output works.
But sadly, I figure out that my L6 component is not good for this circuit, on the simulation, ripple voltage has error.
I just wondering that 4.7uF Al. cap. is right solution on this circuit.