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STEVAL-ISA191V1
5 V - 12 V, 15 W double output isolated flyback converter based
on VIPer37LE
Data brief
Description
The STEVAL-ISA191V1 evaluation board
implements an isolated flyback double output (5
V / 1.2 A and 12 V / 0.75 A) 15 W wide range
mains developed for general purpose
applications.
The core of the application is the VIPer37LE, a
new Off-line high Voltage Converter from the
VIPerPlus family. The device is a high-voltage
converter that intelligently integrates an 800 V
rugged power MOSFET with PWM current-mode
control.
Features
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




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
Universal input mains range: 85 – 265 VAC
frequency: 50 – 60 Hz
Output voltage1: 5 V / 1.2 A
Output voltage2: 12 V / 0.75 A
Very compact size
Stand-by mains consumption: < 40 mW at
230 VAC
Average efficiency: > 75%
EMI: according to EN55022-Class-B
RoHS compliant
December 2015
The evaluation board features a small size,
minimal BOM, high efficiency and low standby
consumption. Extremely low consumption under
no-load conditions is ensured thanks to burst
mode operation that reduces the average
switching frequency and minimizes all frequency
related losses.
VIPer37LE operates at 60 kHz fixed frequency.
Frequency jittering is implemented to help meet
electromagnetic disturbance standards, and the
device implements several protections, including
overvoltage, overload, output short circuit,
secondary winding short, hard transformer
saturation protection and brown out protection,
for improved design safety and reliability.
DocID028699 Rev 1
For further information contact your local STMicroelectronics sales
office
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www.st.com
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RV
1.6 A FUSE
DocID028699 Rev 1
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1
R3
22k
JUMPER
22nF
C5
2
39k
R6
1
12Vz
2
FB
C15 Y1 2.2nF
R10 100
R9 100
4.7k
R8
22nF
C7
GND
12V
SFH6106-2T
OPTO1
TS432
3
IC2
1.2k
R12
STPS5H100B
D6
1
Dz3
1.5nF
C6
4
Dz2
18Vz
22nF
CONT
CONTROL
DRAIN
9
8
7
TRANSFORMER
VIPer37LE
2
10
9
8
7
6
3
BR
VDD
IC1
10
R4
BAT46ZFILM
D2
4
3
1
3
47µF 50V
C4
J3
5
180k
R5
BAT46ZFILM
D3
D1
STTH1L06
D5
STPS2H100A
4
C3
BAT46ZFILM
D4
330pF
6
2
CON2
R7
1.8M
R1
270k
R18
T1
1
330
R2
1.8M
47µF 400V
C16
2
12V
L2
R14
68k
R16
5V
C10
2.2nF
C9
220uF
180k
10nF
C14
470k
R13
C11
1200µF
L1
2.2uH
2.2uH
330uF
C8
R17
22k
330k
R15
Dz4
12Vz
R11
12k
C12
2.2nF
C13
5V
5 V 1.2 A
220uF
12V
12 V 0.75 A
12V
2
J1
1
CM Choke
2
100nF
2
F1
-
320V
C1
+
3
1
4
3
C2
5
1
4
RMB6S
BR
Schematic diagram
STEVAL-ISA191V1
Schematic diagram
Figure 1: STEVAL-ISA191V1 circuit schematic
1
2
1
1
GSPG3011151415SG
STEVAL-ISA191V1
2
Revision history
Revision history
Table 1: Document revision history
Date
Version
Changes
09-Dec-2015
1
Initial release.
DocID028699 Rev 1
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STEVAL-ISA191V1
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DocID028699 Rev 1
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