Datasheet

NCP1028
http://onsemi.com
28
Transformer Specifications:
Vout = 5.0 V/3.0 A
Vaux = 20 V/10 mA
Lp = 3.8 mH
Ip, rms = 280 mA
Ip, max = 800 mA
Isec, rms = 5.0 A
Fsw = 65 kHz
Np:Nsec = 1 : 0.052
Np:Naux = 1 : 0.208