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UC3825A based smps troubleshoot

aksnis

Oct 6, 2020
1
Joined
Oct 6, 2020
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Hello

I am trying to repair a smps power supply based on UC3825A

Problem is the resistor R49 & R34 get burst as soon as i start the smps

I am not able to find out the issue

SYS_ECON is a 0-5v given from MCU desired by user to control 0-180v smps output
 

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