ST ISA034V1 User Manual

STEVAL-ISA034V1

10 W 3-phase auxiliary power supply based on the L6565 and STW3N150

Data Brief

Features

■Input voltage range : 185 Vac to 460 Vac

■Input frequency range: 50/60 Hz

■Output 1: 12 V @0.6 A

■Output 2: 5 V @ 0.55 A

■Output power : 10 W

■Safety: EN60950

■EMI: EN55014

Description

STEVAL-ISA034V1

This evaluation board offers a solution for industrial power supplies fed by 3-phase mains. It takes advantage of the high voltage MOSFET STW3N150 to optimize the operation of the quasiresonant flyback converter based on the primary controller L6565. The STW3N150 is a 1500 V power MOSFET, designed with STMicroelectronics’ proprietary high voltage "MESH OVERLAY™" technology. Thanks to this

technology, the switch features very low RDS(on) per area, low gate charge and high switching

performance. The evaluation board has been designed and developed to address low power applications. It features two isolated outputs (12 V and 5 V) and is capable of delivering up to 10 W of output power.

February 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

T1

Schematic

schematic

NTC2

D8

L6

1

8

J6

50E

R9

STPS3L40S

10u

R24

2

12V @ 600

mA

Co1

Co3

nc

C

C

R27

150K

C8

220u

- 25V

22u - 25V

3

1M

R5

2

7

1

5V @ 550

mA

D13

C22

1n/2kV

D12

1.8M

D9

1N4007

1N4007

+

R10

L7

L8

1mH

D4

D5

3

6

CON2

F4

1A

A

4.7uF

150K

A

R26

STPS3L25S

10u

400Vac

2

4

L11

3

1M

R7

STTH108

Co2

Co4

R25

STTH108

220u

- 10V

nc

1

L9

1mH

C20

C21

R6

330k

4

5

22u

- 10V

1.8M

TRANSFORMER

CON1

R11

10n -X2

10n -X2

R28

R8

Lp =15mH

C

C

1M

330k

N1/N5V=87

1

27 mH

2

C23

10

230Vac

+

D6

N1/N12V=38

D11

D10

N1/Naux=30

2

1N4007

1N4007

4.7uF

U1

Q11

nc

C15

Core material N67

1

Core shape E20 (E25)

A

A

R29

1

8

1N4148

1M

INV

VCC

CON2

2

7

6.8n

- nc

COMP

GD

R12

R19

3

6

2.2k

- nc

2.2k

VFF

GND

R15

M1

C10

R12

4

5

1

C16

CS

ZCD

R16

nc

R21

1n

12k

15k

3

L6565

STP4N150

10k

2.2

2

R14

D7

R17

L10

1mH

1k

R23

C17

120k

1N4148

R18

3.5

560

C9

C14

330n

C11

R13

C13

47u

100p

C18

100n

R20

2.2n

27k

1k

3

n.c .

U2

U3

1

TL431

2

PC817

R22

10k

C12

220p

C19

2.2n

- Y1

ISA034V1-STEVAL