Resistor Rfwd Failing
討論版: AC-DC Conversion Forum
Hi, We have designed SMPS 24V/3.5A, Input range 180V to 265V AC 50Hz, Input cap 100uF/450V Device used INN-3670C, observed that during Vin=180V, Output current= 3.0A worked for 15min & Rfwd resistor 47E(250mW) is failed. However SMPS withstood (On for 3hrs) for same load when Vin=240V. regards Sreenivasan. M