ST ISA031V1 User Manual

STEVAL-ISA031V1

Demonstration board for 40 W auxiliary 3-phase power supply based on the L6565 and STW4N150

Data Brief

Features

■Input voltage range: 185 Vac to 460 Vac

■Input frequency range: 50/60 Hz

■Output voltage Vout1= 24 V @ Iout1= 1.7 A

■Output voltage Vout2= 5 V @ Iout2= 1 A

■Total output power 40 W

■Safety: EN60950

■EMI: EN55014

Description

STEVAL-ISA031V1

This demonstration board introduces a solution for industrial power supplies fed by a 3-phase mains supply. It takes advantage of the high voltage MOSFET (1500 V breakdown voltage) to optimize the operation of the quasi-resonant flyback converter based on the primary controller L6565. The demonstration board has been designed and developed to address low power applications. The board features two outputs,

24 V and 5 V, and is able to deliver more than 40 W. The 5 V output is obtained using an integrated DC-DC converter based on L5970AD, connected on the 24 V output.

November 2008	Rev 1	1/4
For further information contact your local STMicroelectronics sales office.		www.st.com

2/4

1

Circuit

.1 Figure

Circuit

schematic

480-650VDC

NTC1

T1

schematic

7

50E

R5

R10

D9

STPS5H100

L5

10uH

150K/2W

8

R1

1.8M

C5

J6

3

1M

C15

R22

D2

C1

3.3n/2kV

C16

D1

1

24V/1.7A

1N4007

1N4007

+

R11

1

220u/35V

22u/35V

nc

2

R6

5V/1A

L1

1mH

A C

150K/2W

14

3

F1

1.8M

D6

D5

1A

AC

22uF/450V

R2

2

400Vac

CON3_0

2

4

L4

3

1M

R8

STTH108

STTH108

TRANSFORMER

Schematic

1

L2

1mH

C3

C4

330k

CON1

R7

R12

16R

10n-X2

R3

1.8M

10n-X2

C2

R9

C

C

1

27 mH

2

1M

230Vac

D3

D4

+

330k

D7

2

1N4007

1N4007

U1

Q11

nc

U4

L5970AD

1

22uF/450V

C13

L6

15uH

A

A

R4

1

INV

VCC

8

1N4148

1

8

CON2

1M

OUT

VCC

2

COMP

GD

7

6.8n - nc

R13

D10

2

7

SYNC

GND

3

VFF

GND

6

R17 56k

2.2k - nc

C17

R23

STPS2L25U

3

6

C20

2

M1

12k

INH

VREF

C6

R14

4

CS

ZCD

5

C12

+

4

5

R18

nc

COMP

FB

1n

18k

L6565

1

220uF/10V

C18

10uF/35V

2.2

3

HS 12 C/W

STP4N150

R24

C19

22n

R19

3k9

220p

R16

D8

R25

L3

1mH

1k

4k7

120k

1N4148

R20

R21

2R2

2R2

C7

R15

C8

C10

C11

100n

47u

470p

2.2n

27k

C9

R26

R28

2k2

2.2n

10k - 1%

C14

C21

nc

2.2n - Y1

R29

C22

22n

5k6

C23

R27

n.c.

3k3

U5

U2

1

TL431

3

PC817

2

R30

1.2k

- 1%

ISA031V1-STEVAL