Schematic for the NCP1075NONGEVB Evaluation Board D6 D9 BAT54 MMSD 4148A D8 J1 L1A F1 L 1 mH 1A C1 AC Input 0.1uF "X" R1 N 6.8 ohms 2W (wire wound) R2A C2 3.3M R2B 3.3M D1-D4 MRA4007 X4 C3 0.1uF "X" L1B R3 C4 68K 1/2W 1nF 1kV Primary Ground Plane 4 3 2 7 1 6 MBRS240 (100 kHz) C5 22uF 25V C11 C10 1000uF 16V C9A C9B 0.1uF 50V 8 1N4937 4 5 D7 VS1 +5V C8 Com 1500uF, 6.3V MBRS240 0.1uF 50V R4 1 NCP1075 VS2 +8.5V D5 10uF 400V U1 1 mH T1 Z1 2K C6 10nF C7 0.1uF Q1 NST45011 R5 MMSZ 5229B (4.3V) R6 100 Vtrim 120 R9 10K R10 10K NOTES: 1. 2. 3. 4. Crossed schematic lines are not connected. R4 value dependent on VS2 nominal output voltage. R1 is optional inrush limiting resistor. U1 tab (pin 4) should have heatsinking clad pours and be part of a ground plane area for best noise immunity. 5. Heavy lines indicate recommended ground plane areas. 6. L1A/L1B are Wurth 7447728102. 7. Z1 sets nominal 5Vout. R6 can trim Vout upward. Non-Isolated, 8 Watt, Dual Output NCP1075 PSU with Universal AC Input (Rev 8) 6/20/2013 -1- www.onsemi.com