CR6842 反激式开关电源方案

一、电路原理图(Schematic):

二、PCB Lay out

1、TopOverlay

2、Bottomlayer

3、BottomOverlay

二、元器件清单(Bill of Material):

Designator Description PartType C1 C/C;DIP;+/-10%;Pintch =200mil 103/1KV

C2 C/E;Ф18*32;105℃;+/-20%;nichicon 120uF/400V C3 C/E;Ф5*11;105℃;+/-20%;panasonic 10uF/50V C4 C/C;SMD;+/-10%;0805; Open 221/25V C5 C/C;SMD;+/-10%;1206 102/100V C6 C/C;SMD;+/-10%;1206 102/100V C7 C/E;Ф10*20;105℃;+/-20%;Pintch=200mil;panasonic 1000uF/25V C8 C/E;Ф10*20;105℃;+/-20%;Pintch=200mil;panasonic 1000uF/25V C9 C/E;Ф10*20;105℃;+/-20%;Pintch=200mil;panasonic 1000uF/25V C10 C/C;DIP;+/-10%;Pintch =

200mil;63V 104/63V C11 C/C;SMD;+/-10%;0805 222/25V

CX1 C/X1;+/-20%;275V;Pintch =600mil;DAIN 0.33u/~275V CY1 C/Y1;+/-20%;Pintch =

400mil; 222/400V B1 BRIGE;4A;600V KBL406 D1 DIODE; 1A;1000V;Fast Recovery;DO-41 FR107 D2 DIODE; 1A;>150V;DO-41 1N4007 D3 Fast Recovery Diode ;SMD;1206 1N4148 D4 Schottky Barrier Rectifiers;20A;100V;TO220 Y2010 D5 Schottky Barrier Rectifiers;20A;100V;TO220 Y2010

D6 GREEN;Ф3mm LED R1 RES;SMD;1206;+/-5% 100K R2 RES;SMD;1206;+/-5% 750K R3 RES;SMD;1206;+/-5% 750K R4 RES;SMD;0805;+/-5%;Open 20K R5 RES;SMD;1206;+/-5% 27K

R6 Thermistor;Open

thermistor R7 RES;SMD;1206;+/-5% 200K R8 RES;SMD;1206;+/-5% 200K R9 RES;SMD;1206;+/-5% 1.5M R10 RES;MOF;+/-5%,1/4W 510K R11 RES;SMD;1206;+/-5% 10? R12 RES;SMD;1206;+/-5% 100? R13 RES;SMD;1206;+/-5% 47? R14 RES;SMD;1206;+/-5%

47?

R15 RES;SMD;1206;+/-5%;Short 1K(Short = 0?)R16 RES;MOF;+/-5%,2W 0.33?

R17 RES;SMD;0805;+/-5% 1K R18 RES;SMD;0805;+/-5% 3.3K R19 RES;SMD;0805;+/-5% 47K R20 RES;SMD;0805;+/-5% 10K R21 RES;SMD;0805;+/-5% 2K R22 RES;SMD;0805;+/-5%

39K R23 RES;SMD;0805;+/-5%;Open

1.5M

F1 FUSE,T3AL/250V;4.5*14.5L;Glass F3A/250V J1 POWER_ACIN CON2 L1 Ф8*20; 5A

10uH

LF1 FILTER;UU10.5 10mH N1 NTC;5D-9

5D-9 Q1 MOSFET;7A;600V;TO220 7N60 T1 TRANSFORMER;PQ26-20 PQ2620 U1 SO-8 CR6842 U2 DIP4 PC817B U3 TO92 TL431

三、变压器示意图及参数配置：

Core & Bobbin Winding Start Stop Wire Gauge(mm) Turns

W1 Pin3 Pin2 0.41*2 18

W2 Pin10,11,12Pin7,8,90.51*4 6 PQ26-20

W3 Pin6 Pin4 0.18*1 9

W4 Pin2 Pin1 0.41*2 18 NOTE: Np(W1+W4) Lp=450uH 漏感小于25uH