80 W ESBT quasi-resonant wide-range SMPS demonstration
board based on the L6565 for 3-phase applications
Features
■ 3-phase 80 W auxiliary output SMPS
■ Quasi-resonant SMPS
■ Input: 180 V
■ Output voltage: 24 V, 3.3 A
■ Maximum output power: 80 W
■ Efficiency > 80 %
■ Switching frequency > 50 kHz
■ Safety compliant according to EN60950
■ Feedback: secondary regulation
■ RoHS compliant
Description
to 600 VAC
AC
STEVAL-ISA019V3
Data brief
STEVAL-ISA019V3
The STEVAL-ISA019V3 demonstration board is a
3-phase auxiliary power supply with an 80 W dual
output SMPS, using the L6565 PWM driver and
the STC04IE170HP ESBT as the main switch.
The combination of these ST parts provides a
high-efficiency solution for high DC input voltage,
a typical requirement of any 3-phase application.
The necessity to handle both high output power
and wide input voltage is resolved using a flyback
stage working in mixed operation mode:
discontinuous and continuous.
April 2011 Doc ID 018778 Rev 1 1/4
For further information contact your local STMicroelectronics sales office.
www.st.com
4
Circuit schematic STEVAL-ISA019V3
1 Circuit schematic
Figure 1. Demonstration board schematic
VDC
2
1
J3
D5
2/4 Doc ID 018778 Rev 1
24
47k
1k2
R26
+
35V
00u
C4
10
+
35V
C3
1000u
20120D
STPS
10
12
11
T1
5
9
8
7
Ns
3
6
Np
1150
D6
STPS
R5
2R2
C6
+
C5
VCC
C7
6.8n 2k V
R6
39k 2W
180k
R1
C1
+
H-6017C
ux
2
Na
DELTA 86
0n
10
50V
47u
H108
STT
D8
D7
STTH108
R7
39k 2W
R2
200k
R3
200k
220u 450V
D4
D2
1N4007
D1
1N4007
D3
01
2021
1
VOGT SL0512
D1010STT
180k
R4
C2
+
1N4007
1N4007
56k
R14
R13
2k2
s
turn
2
3
4
s
12
turn
H108
220u 450V
Q1
1
T2
2
4
b 0R
R11
VCC
NTC1
10R
R20
47k
R19
R21 15k
R23
3k3
1k5
R24
1
ISO1
4
C11112n2
2
ZCD
D11
0HP
STC04IE17
2
R11 1R
5
1N4148
VCC
8
7
R12
10R
OUT
U1
COMP
CS
4
L6565N
R15 1k
3
3V
D9
C8
150n
F2
T1A
J1
1M1
R8
C
VA
-550
2
1
160
2
3
GND
INV
VFF
C13 10n
U2
1
PC817
C10
10p
6
1
3
C9
470p
1R5 0. 6W
R17
1R5 0. 6W
R16
R9
1M1
2.7k
R22
3
TL431
2
C12121n
10k
R18
1M1
R10
AM07972V1