Hi all
I have assembled this device it when I am connecting the device to power supply (28V/2A) and battery(24V two 12 v batteries in series)
1) initially it draws some current but after that I don't know why the voltage in the input side (across connector J6 in the attached schematic) continuously started increasing, (even after turning off the power supply ) and it stops at 60V
2) after this Observation I tried to connect a small solar panel of 28v(18W) and 24 v battery at that time the transistor Q9, got burned
Schematic : http://www.ti.com/lit/df/tidryu8/tidryu8.pdf
Anyone please suggest the possible chances for these kinds of incidents