AC/L

AC/N

V-

FG

V-

V-

V+
V+
V+

S-400-12 (12V 33A) Supply schematic

Traced 27/10/15

Voltage sense

Input filter and HV DC supply

Voltage loop

compensation

Current loop

compensation

VR1 gives 10-15V range

Gives 43kHz

VCC is about 22.5V when operating normally - less if running in self-excited/startup mode

PE

V+

V-

6.3A/250V

5D-15

220n 275V X2

680k

2n2 Y1

2n2 Y1

PE

PE

RS807

680u 250V

680u 250V

150k

150k

1N4007

1N4007

TXFR_GATE

750R

V+

V-

6k8

100n

680R

1k5

1k

TL494CN

22k

1n

V-

V-

V-

VCC

1k5

VCC

VREF

10n

V-

10n

1k

V-

V-

68k

VREF

5k6

VREF

5k6

V-

220p

22n

27k

5k6

10n

100n

V-

1

2

3

4

5

6

7

8

9

CON1

F1

RT1

C4

R1

4

1

2

3

LF1

C1

C6

BD1

SW1

C2

C3

R2

R3

D7

D1

TR1

R35

R32

C31

R39

R40

VR1

+I1

1

+I2

16

-I1

2

-I2

15

COMP

3

CT

5

RT

6

GND

7

C1

8

C2

11

E1

9

E2

10

VCC

12

OUTC

13

VREF

14

DTC

4

IC1

R17

C15

R11

C28

C23

R24

R21

R34

R30

C26

C25

R22

R36

C29

C16

+

+

+

+

O

sc

i.

Thermal switch

Soft-start

Short-circuit

S-400-12 (12V 33A) Supply schematic

Traced 27/10/15

Fan supply + thermal switch

Auxiliary supply

Base transformer drive

protection

VCC is about 22.5V when operating normally - less if running in self-excited/startup mode

3u3 400V

FJP13009

FJP13009

390k

FR157

FR157

390k

1R

1R

1N4007

1N4007

1N4007 1N4007

2k7

2k7

4u7 50V

4u7 50V

TXFR_MAIN

1

5

0

R

1

5

0

R

1

5

0

R

1n

STPS30H100C

STPS30H100C

14.5uH 2.2mR

V-

3m9

3m9

3m9

3

3

0

0

u

 1

6

V

3

3

0

0

u

 1

6

V

3

3

0

0

u

 1

6

V

1

0

0

n

V+

330R

10n

PE

4n7

12R

4n7

12R

3k9

V+

V-

6k8

1k5

10n

2SC1815

2u2 50V

2

S

C

2

6

5

5

2

S

C

2

6

5

5

1N4148

1N4148

1

N

4

7

5

2

1

N

4

7

5

2

3k9

1k5

1k5

3k9

V-

4u7 50V

V-

V-

VCC

V-

VCC

V-

FR104

FR104

22R

100u 35V

V-

Fan (14V 0.15A)

V-

FR104

FR104

47u 50V

V-

1k5

V-

15R

15R

VCC

C6V2

5k6

1N4148

VREF

120k

1u 50V

10k

V-

4u7 50V

10n

V-

V-

C10

Q1

Q4

R14

D6

D3

R8

R20

R9

D8

D2

R4

R13

C9

C14

TR2

R

5

R

6

R

7

C5

DB1

DB2

2

1

L1

J1

J4

J7

C

1

2

C

2

1

C

2

2

C

1

3

R16

C7

C20

R25

C17

R26

R41

LED1

R31

R38

C33

Q5

C30

Q

2

Q

3

D4

D5

Z

D

1

Z

D

2

R10

R12

R15

R18

C11

D9

D10

RT2

R37

C32

1
2

CON2

D11

D12

C27

R28

R23

R27

ZD3

R33

D13

R29

C24

R19

C18

C34

+

+

+

+

+

+

+

+

+