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TIDA-010042: I have made this device ,but it is working only Partually

Part Number: TIDA-010042

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

  • Hi Vipin,

    As answered to similar threads, this is due to a problem with the old software of this TI Design while working at low load levels. We have corrected the software now. This can now be downloaded from the TID page.

    Regards,

    Salil