ST ISA023V2 User Manual

STEVAL-ISA023V2

Flyback AC-DC converter evaluation board based on the VIPer53-E

with 24 W negative output

Data Brief

Features

■ Input voltage, Vin: from 90 to 265 V

■ Negative output voltage: -5 V,-12 V

■ Standby consumption: <1 W

■ Total output power: 24 W

■ EMI requirements: EN55022 Class B

■ Safety: EN 60950

rms

Description

This is an ideal solution for a 25 W switch mode
power supply (SMPS) dedicated to industrial or
white-goods applications. The board accepts a
wide range of input voltages (90 to 265 Vrms) and
delivers 2 negative output voltages. The switch­mode power supply(SMPS) is based on the
VIPer53-E. The VIPer53-E combines an
enhanced current-mode PWM controller with a
high-voltage MDmesh™ Power MOSFET in the
same package. The main characteristics of the
evaluation board are its high efficiency and low
standby consumption. These, combined with the
minimal component count and global low cost
approach, makes it an ideal solution for powering
industrial or consumer equipment, while also
meeting worldwide consumption requirements.

STEVAL-ISA023V2

December 2007 Rev 1 1/4

For further information contact your local STMicroelectronics sales office.

www.st.com

4

Board schematic STEVAL-ISA023V2

1 Board schematic

Figure 1. Scheme

CON2CON2

123

4

0

C18

100n

C18

100n

GND

L78L33U4L78L33

Vin Vout

C17

470n

C17

470n

U4

Negative version only

C15

C15

+

15k

15k

TL431U3TL431

0R

220RR7220R

C11

C11

+

+

Positive version only

3.3uHL23.3uH

L2

D6 STPS1045DD6 STPS1045D

7

1k

R141kR14

12

43

U2

PC817U2PC817

L3

D8 STPS2H100D8 STPS2H100

10

D9

9.1VD99.1V

R13

120R

R13

120R

100nF

100nF

470uF/25V

470uF/25V

C14

33uF/35V

C14

33uF/35V

C13

+

0.1uHL30.1uH

C9

470uF/25VC9470uF/25V

+

+

9

C13

+

+

R12

R12

R11

15k

R11

15k

C12

100nF

C12

100nF
10k

10k

R10

R10

U3

R90RR9

R80RR8

0R

R6

220RR6220R

R7

1000uF/25V

1000uF/25V

+

1000uF/25V

1000uF/25V

C10

C10

+

D7

STPS1045DD7STPS1045D

8

2.2nF/Y1

2.2nF/Y1

C16

C16

T1T1

1

t

t

RT1

RT1

15R

15R

4

3

D5

1.5KE150AD51.5KE150A

D4

STTH1R06D4STTH1R06

D1

D1

R11MR1

1M

20mH/1AL120mH/1A

L1

F12AF1

2A

D3

BAR18D3BAR18

C8

120pFC8120pF

Q1

BC807-40Q1BC807-40

D2 STPS1150D2 STPS1150

R3

C3

68uF/400VC368uF/400V

-+

-+

R21MR2

1M

C2

C1

1

CON1

CON1

5

7

U1

5.6kR35.6k

221

5 6

D

VIPer 53DIPU1VIPer 53DIP

100nF/275VAC/X2C2100nF/275VAC/X2

100nF/275VAC/X2C1100nF/275VAC/X2

Input 85 - 265VAC

Input 85 - 265VAC

R5

7.5kR57.5k

22uF/35VC722uF/35V

C7

S

3

S

4

COMP

1

VDD

TOVL

8

OSC

NC

2

6

C4

C6

150nFC6150nF

R4

5.1kR45.1k

C5

39nFC539nF

4.7nF/50VC44.7nF/50V

2/4