ST ISA034V1 User Manual
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
STEVAL-ISA034V1
10 W 3-phase auxiliary power supply
based on the L6565 and STW3N150
Data Brief
Description
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 R
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.
DS(on)
STEVAL-ISA034V1
February 2008 Rev 1 1/4
For further information contact your local STMicroelectronics sales office.
www.st.com
4
Circuit schematic STEVAL-ISA034V1
1 Circuit schematic
Figure 1. Schematic
5V @ 550 mA
12V @ 600 mA
J6
CON2
J6
CON2
2
3
1
R24
nc
R25
nc
R22
R21
10k
R21
10k
C17
330n
C17
Co3
Co4
Co4
22u - 25V
22u - 10V
22u - 10V
10u
L7
L6
10u
Co2
Co2
Co1
Co1
220u - 25V
220u - 25V
220u - 10V
220u - 10V
D8
D9
D8
D9
STPS3L40S
STPS3L25S
STPS3L40S
STPS3L25S
7
8
7
8
T1
T1
1
2543 6
1
2543 6
C8
C8
R9
150K
Lp =15mH
TRANSFORMER
TRANSFORMER
D5
STTH108
D4
D4
R11
R11
STTH108
STTH108
1n/2kV
1n/2kV
R10
150K
R10
150K
R7
330k
R7
330k
R8
R8
2.2k
2.2k
R19
R19
N1/N12V=38
N1/Naux=30
Core material N67
Core shape E20 (E25)
N1/N5V=87
10
10
330k
330k
C16
C16
M1
M1
12
12
6.8n - nc
C15
R12
2.2k - nc
R12
2.2k - nc
Q11 nc
Q11 nc
D6
1N4148
R15
R15
330n
560
R23
nc
nc
R18
3.5
R18
3.5
STP4N150
STP4N150
3
3
1k
1k
R17
R17
2.2
2.2
R16
R16
C14
C9
C9
15k
15k
10k
R22
10k
n.c.
C18
1
3
3
2
2
U3
U3
TL431
TL431
R20
1k
U2
PC817
100p
C19
C19
2.2n - Y1
47u
47u
2.2n - Y1
D7
D7
6
6
5
8
5
8
7
7
GD
GD
VCC
VCC
GND
GND
U1
U1
VFF
INV
COMP2CS
VFF
INV
COMP2CS
3
1
3
2
R6
C21
L9 1mH
1
1.8M
R281MR29
C20
CON1
1
1M
C23
+
4.7uF
10n -X2
2 3
27 mH
1
10n -X2
D10
1N4007
A C
D11
1N4007
A C
1
2
CON2
230Vac
R5
1.8M
R261MR27
1M
C22
+
50E
NTC2
480 - 650VDC
4.7uF
L11
4
D13
1N4007
A C
D12
1N4007
A C
L8 1mH
F4 1A
400Vac
1N4148
1N4148
100n
ZCD
ZCD
4
4
R12
R12
C10
C10
C13
L6565
L6565
120k
120k
R14
R14
220p
220p
C12
C12
R13
12k
12k
1n
1n
27k
R13
27k
2.2n
2.2n
C11
C11
L10 1mH
2/4
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