15V/3.5A 52W switching power supply circuit

Published:2011/7/12 21:49:00 Author:TaoXi | Keyword: 15V/3.5A, 52W, switching, power supply circuit | From:SeekIC

The 15V/3.5A 52W switching power supply circuit which is composed of the MC33374T/TV is as shown in the figure. The permitted range of the AC input voltage u is 92～276V. The rectifier bridges VD1～VD4 use four 1N5406 type 3A/600V siliconrectifier tube. The primary protection circuit is composed of the RC absorbing circuit (R2, C2) and the clamping circuit (VDz, VD5), it can effectively inhibit the peak voltage which is produced the leakage inductance of the high frequency transformer to protect the MC33374 internal power switching tube away from the damage. The VDz uses the P6KE200A type transient voltage suppression diode (TVS), the reverse breakdown voltage UB=200V. The VD5 uses the MURl60 type ultrafast recovery diode (SRD).



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