hi
i have designed a flyback converter using UCC28740 PWM controller. specifications of the converter are as follows:
input 220v ac
output voltage 24v dc
maximum output current 3 A
maximum freq : 65KHz
tranformer inductance 310uH
my problem is that when i connect a 2.5A load to the output, its voltage drops from 24.13 to 22.5 v and it takes the output about 15 to 20 seconds to recover (getting back to 24.07).
why this is happening? i have designed several converters using other controllers but i have never faced sth like this
Schematics of the converter is attached to this message
i have designed a flyback converter using UCC28740 PWM controller. specifications of the converter are as follows:
input 220v ac
output voltage 24v dc
maximum output current 3 A
maximum freq : 65KHz
tranformer inductance 310uH
my problem is that when i connect a 2.5A load to the output, its voltage drops from 24.13 to 22.5 v and it takes the output about 15 to 20 seconds to recover (getting back to 24.07).
why this is happening? i have designed several converters using other controllers but i have never faced sth like this
Schematics of the converter is attached to this message
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