小米插线板VA主芯片要点.ppt

AP3776B+APR34309C_5V3A HenryPhoto of PCB Schematics Bill Of Material Item Description QTY Item Description QTY C1,2 15uF/400V, 105℃, electrolytic 2 R1R2 47MΩ, 0805 2 C3 10uF, 1206, ceramic 1 R3 5.1MΩ,0805 1 C4 10nF, 0805, ceramic 1 R4 300Ω, 0805 1 C5 1nF/500V, 0805, ceramic 1 R5 1R//1R//3Ω, 0805 1 C21 820uF/6.3V, solid 1 R6 4.7KΩ, 0805, 1% 1 C22 560uF/6.3V, solid 1 R7 20K//750KΩ, 0805, 1% 1 C23 100nF, 0805, ceramic 1 R8 39kΩ, 0805, 1% 1 C24 1nF, 0805, ceramic 1 R10 2.4Ω, 0805, 1 CY1 470nF Y-cap 1 R11 470KΩ, 1206, BR bridge-KBP206 1 R12 47Ω, 1206 1 D1 1N4007, SMA 1 R21R23 20Ω, 0603 2 D2 1N4007, SMA 1 R22 27KΩ, 0603,1% 1 D3 1N4148,SOD123 1 R24 22Ω, 0603 1 LF 20mH—UU9.8 1 TR1 EE19(560uH) 1 L1 1mH 6*8 1 IC1 AP3776B 1 FR1 250V 2A 1 IC2 APR34309C 1 Q1 10N65(TO-220塑封) 1 Transformer Specification Winding Sequence: Reverse the bobbin for WD4 ，for all the pins are placed on the right hand side WD 1 Primary winding 1 Start at Pin 2. Wind 28 turns of ?0.26mm wire from left to right. Finish on M. Wind tightly spread evenly Insulation 2 Layers of insulation tape , 0.05mm thick, 8.5mm wide. WD 2 Auxiliary winding Start at Pin 4. Wind 9 turns of three paralleled ?0.26mm wire from left to right. Finish on Pin 5. Wind tightly spread evenly Insulation 2 Layers of insulation tape , 0.05mm thick, 8.5mm wide. WD 3 Wire Shielding Start at Pin 5. Wind 35 turns of ?0.2mm wire from left to right. The terminal float. Wind tightly spread evenly Insulation 2 Layers of insulation tape , 0.05mm thick, 8.5mm wide. WD 4 Secondary winding Reverse the bobbin for WD4 .Start at A. Wind 4 turns of two paralleled ?0.65mm Triple Insulated Wire from right to left .Terminate on B. Wind tightly spread evenly Insulation 2 Layers of insulation tape , 0.05mm thick, 8.5mm wide. WD 5 Wire Shielding Start at Pin 1. Wind 10 turns of ?0.2mm wire from left to right. The terminal float. Spread evenly. Insulation 2 Layer of insulation tape , 0.05mm thick, 8.5m