Schematic for the NCP1611GEVB Evaluation Board Vin U1 GBU406 L2 200 µH (np/ns=10) . . + C4 220nF Type = X2 C5 470 nF / 400 V IN D2 1N5406 D1 MUR550 Rth1 B57153S150M Vaux - R2 1000k V line R1 1000k DRV C1 1 nF Type = Y D3 1N4148 R6 22 C2 1 nF Type = Y CM1 R5 2.2 Q1 IPA50R250 R4 10k I sense R3 80m 3W L1 C6a 68µF/450V C6b 68µF/450V GND C3 680nF Type = X2 D4 1N4148 F1 C7 22µF/50V DZ2 33V V CC Earth + N 90-265 Vrms - L Vbulk Socket for External VCC Power Source Figure 1 - Power Section 8/31/2012 -1- www.onsemi.com V line Vbulk R22 560k Vin R16 120k R23 1800k R9 1800k V CC R11 27k R24 1800k R17 120k R10 1800k C8 1nF R25 1800k C10 220nF C16 470pF R26 120k R15 120k R8 680k D6 1N4148 1 8 2 7 3 6 4 C13 10nF R18 27 Vaux D5 1N4148 R7 0 R20 4.7k 5 R21 4.7k I sense R12 22k C9 2.2µF DRV R14 270k C11 470pF R13 0 C15 220nF C12 NC DZ1 22V C14 NC D7 1N4148 GND Figure 2 - Control Section 8/31/2012 -2- www.onsemi.com