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ISSUE
DRAWING NO.
DRAWING TITLE
DATE
Filename:
ECO No. DESCRIPTION OF CHANGE
L897CT_4.0.sch
40W Universal Power Supply
Contact Engineer:
L897CT
23-Jul-2002
INITIALS
Printed:
1 1Sheet of
Notes:
Contact Tel: (01223) 203252Kevin Lamb
A & R Cambridge Ltd.
Pembroke Avenue
Cambridge CB5 9PB
Waterbeach
23425
C2
220N X2 CLASS
C3
220N X2 CLASS
R1
1M5 VR25
F1
AS1A6
+
1
~
2
-
4
~
3
BR1
BRGBU4K
VDC325VP
D3
UF5403
D4
UF5403
Vin
I
GND
G
Vout
O
REG2
7918
Vin
I
GND
G
Vout
O
REG1
7818
AGND
+
C48
100U EL
+
C49
100U EL
+18VA
-18VA
L7
33UH 2A RA
L4
33UH 2A RA
L6
33UH 2A RA
L5
33UH 2A RA
+
C45
100U EL
+
C46
100U EL
+
C47
100U EL
+
C50
100U EL
+12VD
+5VD
+3V3D
DGND
-12VD
L2
33UH 2A RA
L3
33UH 2A RA
+5VF2
0VF2
C9
100N PE
C10
100N PE
C14
100N PE
C15
100N PE
C8
100N PE
C7
100N PE
C21
100N PE
C23
100N PE
C27
100N PE
C30
100N PE
C20
100N PE
C29
100N PE
AGND +21VA-21VA
+12VD+5VD+3V3DDGND-12VD
C24
100N PE
C26
100N PE
C22
100N PE
C25
100N PE
C28
100N PE
C31
100N PE
+7VF20VF2 0VF1 +46VF1
+3V3NFB
+5VNFB
COMP
1
VFB
2
ISEN
3
RT/CT
4
GND
5
OUT
6
VCC
7
VREF
8
IC3
IC PWM UC3843
+40VF1
+40V_VSET
R33
1K0 MF
R25
15K MF
R52
16K MF
+3V3NFB' +5VNFB'
R51
10K MF
R24
10K MF
R34
1K0 MF
0VF1
+5V_VSET
D12
5V6 400MW
R39
1K0 MF
+12VD'
C19
100N PE
R50
6K8 MF
C70
3N3 PP
R29
10K MF
VREF5VP
D16
1N4148
R13
100K MF
C12
100N PE
PGND2'PGND2'
PGND3
PGND1
NFB
R17
22R MF R20
10K MF
1
4
20T 20T
2
3
TX1
TX 1:1 GATE DRV
C5
100N PE
PGND2
C4
100N PE
TR1
BC546B
C6
100N PE
+5VP
TR4
BC546B
TR10
BC556B
VREF5V
DGND'
D15
1N4148
C17
100N PE
DGND'
PGND4'
DGND'
MAINSOK*
+21VA
-21VA
1
2
3
4
SK8
AMPCT4
R55
22R MF
D17
1N4148
R46
1K0 MF
C63
100P CD
SYNC
PSUKILL*
DGND'
1
2
3
4
5
6
7
8
SK5
AMPCT8
DGND
+5VD
+3V3D
-12VD
+12VD
1
2
3
4
5
6
7
8
SK6
AMPCT8
DGND
+5VD
+3V3D
-12VD
+12VD
1
2
3
4
5
6
SK2
AMPCT6
+5VF2
0VF2
+40VF1
+40V_VSET
0VF1
+5V_VSET
R43
22K MF
D13
ZENER 500MW 43V
R44
1K0 MF
+5VP
PGND4'
TR6
BC556B
C1
3N3 MAINS
TH1
THERMISTOR 25R 3A
SW1A
MAINS_SW
SW1B
MAINS_SW
PGND1
R54
22K MF
C16
100N PE
PGND4'
TR9
BC556B
R48
470R MF
R42
1K0 MF
R45
1K0 MF
R41
1K0 MF
R11
100K MF
R12
220K MF
C65
1N PE
TR3
BC546B
R49
2K2 MF
C62
100P CD
R38
1K0 MF
TR2
BC546B
R47
470R MF
PGND4'
TR5
BC546B
C64
1N PE
R22
10K MF
R27
10K MF
C51
100N PE
R26
10K MF
R21
10K MF
R36
47R MF
R18
10R MF
R19
10R MF
R37
1K0 MF
R40
1K0 MF
+
C68
22U EL
+
C69
22U EL
+
C13
22U EL
+
C18
22U EL
HS2
TO220HS30REG
HS1
TO220HS30REG
R31
470R MF
1
2
3
4
5
6
SK3
AMPCT6
1
2
3
4
5
6
7
SK7
AMPCT7
AGND
+18VA
-18VA
+21VA
-21VA
AGND
+18VA
-18VA
+21VA
-21VA
1
2
3
4
SK10
CON 4W MOL4455C
1
2
3
4
SK12
CON 4W MOL4455C
1
2
3
4
SK13
CON 4W MOL4455C
HT
AUX
AUX'
RAMP
RAMP'
LINE
LINE'
PGND3'
M1G'
M1G
M2G
M2G'
ISNS'
ISNS
RAMPRAMP'
LINELINE'
HTHT'
AUXAUX'
ISNS' ISNS
M2G
+3V3NFB'+5VNFB'
+3V3NFB +5VNFB
DGND'
DGND
+12VD'
+12VD
FIX3
FIXING HOLE
FIX2
FIXING HOLE
FIX1
FIXING HOLE
FIX4
FIXING HOLE
D1
15V 400MW
+46VF1
+7VF2
1
2
3
4
5
6
SK1
MOLEXPWR6
1
2
3
4
5
6
HS3
PSU HEATSINK
PGND2
DGND
AGND
+
C43
22U EL
+
C44
22U EL
+
C34
22U EL
PGND4'
P1 SCOPE POINT
P3 SCOPE POINT
P4 SCOPE POINT
P15
SCOPE POINT
P14
SCOPE POINT
P6
SCOPE POINT
P16
SCOPE POINT
P9
SCOPE POINT
P8 SCOPE POINT
P10
SCOPE POINT
P7 SCOPE POINT
P2
SCOPE POINT
P12
SCOPE POINT
P13
SCOPE POINT
P17
SCOPE POINT
P36
SCOPE POINT
P5 SCOPE POINT
P18 SCOPE POINT
P19 SCOPE POINT
P20
SCOPE POINT
P21
SCOPE POINT
P22
SCOPE POINT
P23
SCOPE POINT
P24
SCOPE POINT
P25
SCOPE POINT
P26
SCOPE POINT
P27
SCOPE POINT
P28
SCOPE POINT
P29 SCOPE POINT
P30 SCOPE POINT
P31 SCOPE POINT
P32 SCOPE POINT
P33 SCOPE POINT
P34 SCOPE POINT
P35
SCOPE POINT
P11
SCOPE POINT
+
C35
100U/400V EL
PCB
PB1
L897PB
1
2
3
4
PL10
CON 4W 0.1 HDR
1
2
3
4
PL12
CON 4W 0.1 HDR
1
2
3
4
PL13
CON 4W 0.1 HDR
R7
220K MF
R8
220K MF
R6
220K MF
R5
220K MF
R9
33K MF
R4
1K0 MF
R15
33K MF
R14 47K MF
R16 220K MF
DGND
VREF5V
1
2
3
4
SK11
CON 4W MOL4455C
M1G' M1G
1
2
3
4
PL11
CON 4W 0.1 HDR
M2G'
PGND2' PGND2'
PGND2 PGND2
PGND2'
LK3
PCB NET LINK
C71
3N3 MAINS
PGND2
LK2
PCB NET LINK
LK5
PCB NET LINK
1 2
LK1
10MM LINK
TR11
BC546B
R56
10K MF
+12VD'
C72
100N PE
DGND'
C73
100N PE
PGND3'
PGND4'
PGND1
PGND2
CONTROL PCB
MAIN PCB
R23
100K MF
R64
470R MF
R63
4K7 MF
D20
5V6 400MW
PGND4'
+
C61
100U EL
C56
220P PP
D18
1N4148
R53
4R7 MF
R3
4R7 MF
D19
15V 400MW
E/A OUT
12
E/A IN
13
OSC2
10
GND
8
OUT1
4
VDD
3
VREF
14
PGND
5
OUT2
6
LINE
2
SHTDWN
16
SS
15
RAMP
9
DELAY
1
OSC1
11
CLK
7
IC1
IC PWM UCC3580-4
PGND2'
D11
1N4148
C67
100N PE
C52
680P PP
R2
220K CF 2W
M2
MOSFET MTP6N60E
M1
MOSFET MTP6N60E
IC4
OPTO AC SFH628-A3
R28
220K MF
R10
220K MF
PGND3
PGND4'
TR12
BC546B
DGND'
R35
47K MF
VREF5V
C33
100N PE
+
C40
4700U 10V LOW Z
+
C37
1000U 35V LOW Z
+
C41
1000U 35V LOW Z
+
C38
1000U 35V LOW Z
+
C39
1000U 35V LOW Z
+
C42
4700U 10V LOW Z
D9 UF4004
C75
C CER 220PF 1KV
R57
100R MF
C74
C CER 470PF 1KV
R58
100R MF
C53
C CER 470PF 1KV R61
10R MF
C55
C CER 470PF 1KV
R62 10R MF
C76
C CER 220PF 1KV
R59
100R MF
C77
C CER 220PF 1KV
R60
100R MF
LK4
PCB NET LINK
PGND4'
MAINS
MAINS
MAINS'
DGNDDGNDN
AGND
AGNDN
DGNDDGNDN
LK6
PCB NET LINK
LK7
PCB NET LINK
R32
470R
TR7
TRANS MP NPN DARL BD677
TR8
TRANS MP NPN DARL BD677
TR13
BC546B
R65
470R MF
C11
100N PE
D10 UF4004
D14
UF4004
D2
18V 400MW
+
C36
100U EL
R67
15K MF
R66
15K MF
D8
UF5403
D5
UF5403
+
C59
100U 63V YXF LOW Z
+
C58
100U 63V YXF LOW Z
C32
C PE 100NF 400V
+
C79
1U0 EL
D6 1N5822
D7 1N5822
R30
0R22 MF
C60
220P CD
M3
ZVNL120
C78
100N PE
R68
10K
D21
1N4148
VREF5VP
8A
5
6
24T
7T
7T
7T
3T
1
11B
10A
10B
7
4
24T
3
9B
11T
11T
8B
9A
5T
2T
23T
2
13B
12A
12B
14B
14A
13A
11A
120C
NC
L1
L TX ETD34 250UH 21PIN
1
2
3
4
5
6
7
8
SK4
AMPCT8
DGND
+5VD
+3V3D
-12VD
+12VD
C81
3N3 MAINS
C80
3N3 MAINS
L8
33UH 2A RA
1
34
2
L9
CM_CHOKE 1.5MH
PD1
MTG PAD 3.5MM TOP
PD2
MTG PAD 3.5MM TOP
PD3
MTG PAD 3.5MM TOP
PD4
MTG PAD 3.5MM TOP
D22
1N5711
C66
47N PE
C54 220P CD
C82 4N7 PE BA 2500
C83
33P CD
1.0 WAF 13/11/01
NF
R69
47K MF
DGND'
2.0KAL 18/02/02 ADDED R69 TO MAINS OK CCT C33 CHANGED TO NF02_E051
+
C57
100U EL
NF
NF
NF
NF
NF
NF
3.0WAF 16/04/02 PCB ONLY UPDATED FOR CHASSIS PLANES02_E090
3.1WAF 25/04/02 SCREW ON MOSFET LONGER02_E094
4.0KAL 15/07/02 R1 SET TO NF IC2 CHANGED TO HCNW13702_E142
NF
2
3
GND
5
VDD
8
6
EN
7
IC2
HCNW137 OPTO