3-phase power supply evaluation board with ESBT® (100 W)
Features
STEVAL-ISA015V2
Data Brief
■ Input voltage: 400 V
■ Output power: 100 W
■ High efficiency (90%)
■ Switching frequency: 50-85 kHz
■ Safety compliant in accordance with EN60950
+/- 20%
AC
Description
This is a dedicated evaluation board using emitter
switched bipolar transistors (ESBTs) featuring the
high-power, wide input range requirement of the
highly demanding industrial market. The
maximum output power is 100 W. The need to
handle both high output power and wide input
voltage leads to the design of a flyback topology.
The flyback converter is a popular choice in
applications where the required power is normally
less than 200 W. The main reasons for its
popularity are its simplicity, low cost and high
efficiency despite a small number of active
components. This evaluation board provides a
solution for a power supply solution for 3-phase
applications such as inverters for induction
motors, welding machines, and UPS.
STEVAL-ISA015V2
November 2007 Rev 1 1/4
For further information contact your local STMicroelectronics sales office.
www.st.com
4
Board schematic STEVAL-ISA015V2
4148
2R
10
617
238
10uF
25V
00uF
35V
90k
80k
8H
4
ns
2m
uL
nF
4148
1 Board schematic
Figure 1. Schematic
J3
1
2
39k
R18
C13
1k
15
16
2
6.8nF/1. 25kV
C2
1N4007
4k7
1nF
C14
2
+
35V
1000uF
C12
+
35V
1000uF
C11
10
9
4
D10
m C uL
turns
T1B1B74
2*0.2m
STTH108
R14
100k
R3
680k
400V
1N4148
1N4007
D4
A-3
R16
SFH617
1kR15
U3A
1
H1
100D
D12
STPS8H
T1D
8 turns
20*0.2mm CuL
2
1
T1A
74 turns
2*0.2mm CuL
C3
R13
100k
R1
R2
680k
680k
150uF
150uF
+
400V
+
C1
1N4007
1N4007
D1
D3
D2
4k7
R20
R17
1R5
22nF
U2
T1E
D11
R19
120k
TL431AC
20*0.2mm CuL
8 turns
1
6
T2
3
5
12 t
STTH108
D7
1N4148
2
R10
2R
1N4148 D6
390k
47k
R6
C5
C4
100nF
+
25V
10uF
D5
R5
8
7
T1C
5 turns
0.2mm CuL
STC04IE170H V
Q1
D9
1kR4
R7
8
U1
1
100nF
D8
1N4148
22k
R8
5
6
7
GD
Vcc
INV
ZCD
GND
CS
COMP
VFF
2
3
4
4
U3B
2.2
R12
2.7
R11
3.9V
C10
BC238
Q2
1nF
33pFC8
L6565
470pF
1nF
C6
3
SFH617A-3
1k
R9
C9
C7
F1
J1
T1A
1
2
1
2
J2
400 VAC
230 VAC
2/4
STEVAL-ISA015V2 Revision history
2 Revision history
Table 1. Document revision history
Date Revision Changes
29-Nov-2007 1 Initial release
3/4
STEVAL-ISA015V2
y
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