shaljdav
Newbie level 4
Hi everyone, I am designing Power supply, using LTC7138 Step-down regulator. Input voltage is equal 130V and the output should be also 130V output voltage with 400mA maximum output current. After designing and testing the circuit, unlikely for me, the results were not satisfied me. When the RLOAD = 400 ohm, the output voltage is equal 110V instead of 130V and hence the output current is equal 275mA. With increasing RLOAD the Output voltage also increases, especially when RLOAD is equal 1.3k, output voltage is equal 125V (output current = 125V/1.3k = 95mA). I don’t think there is exciting internal resistance. So I need an answer please.
Here below you can find the circuit which I’ve tested.
Here below you can find the circuit which I’ve tested.