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
STEVAL-ISA023V2 Revision history
2 Revision history
Table 1. Document revision history
Date Revision Changes
03-Dec-2007 1 Initial release.
3/4
STEVAL-ISA023V2
y
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