ST ISA020V1 User Manual
3.5 W battery charger demonstration board
based on the VIPer12AS-E and TSM101
Features
■ Input voltage:
–V
: 88 - 264 Vac
IN
– frequency: 50-60 Hz
■ Output voltages:
–V
–I
■ Output signal: low battery check
Description
The STEVAL-ISA020V1 battery charger
demonstration board utilizes an AC-DC single
output converter with approximately 3.5 W of
power capability.
The simple and cost-effective design is based on
the Viper12AS-E low power off-line SMPS
primary switcher for power conversion , and the
TSM101 voltage and current controller for
monitoring the battery charge level.
OUT
OUT
= 0.5 A
= 0 to 7 V
STEVAL-ISA020V1
Data Brief
STEVAL-ISA020V1
July 2008 Rev 1 1/6
For further information contact your local STMicroelectronics sales office .
www.st.com
6
Circuit schematic and PCB layout STEVAL-ISA020V1
10u
50
101
Vr
220
ou
100p
500
7u
400
V+
LL414
100n
100n
220
10
100
P2
617
A-3
22
617
A-3
7u
t
35
EX-E
220u
35
XY
10u
50
1n
500
Y1
PS
160
60
10
35u
17
t
18
ou
160
t
18
120n
ap
22
22n
P5
ha
330u
190
BC
10
100n
LL414
LL414
P1
7u
400
Vr
25
250
VAC
220
P3
..
P4
10u
50
820
0u
t
35
EX-E
12
AS
ou
...
264
V~
1 Circuit schematic and PCB layout
Figure 1. Schematic diagram
6.9V/0.5A
0..
P3
1
R12
t
Vou
8
LL414
D3
A-3
SFH617
U3A
1
F
V
C3
KME
10u
50
+
8
D2
LL414
R
R5 10
8.2k
R10 1k
F
C10 100n
2
R
R8
220
H
urns
9.7u
9 t
T1C
8
F
V
C13
50
10u
+
ef
Vr
7
1
CD
-
+
8
U2 TSM101
6
C9
TEX-E
0.35
5
V
F
Y1
500
C12
1n
t
Vou
rge
Cha
P5
KME
1
R13
1.8k
F
k
10
R11
2
ef
Vr
F
100n
+
F
V
220u
C4
35
LXY
6
2
V+
F
C6
100p
H
mA
330u
L1
190
D1
~
R
3W
R1
10
V~
264
...
88
100n
C11
4
3
-
5
+
R
820
R14
R9
1k
TEX-E
H
urns
5 t
0.35
T1D
3.0u
7
1
urns
CuL
t
T1A
3.1mH
0.18
160
R
V
100
R3
500
F
V
4.7u
C2
400
+
F
BC
0
S25
L
1
P1
V
4.7u
400
C1
+
VAC
0.5A
250
+
~
-
N
1
L
N
P2
GND
P4
1
R
R16
220
R
R15
220
R17 1R
R18 1R
CuL
H
urns
t
0.18
35u
17
T1B
3
R20
R
A
160
V 1A
D5
STPS
60
mm
H
= 0.22
EF16
AL = 120n
Gap
KMG
KMG
22
4
A-3
SFH617
U3B
VDD
4
U1
VDD
5
6
7
8
4
8
F
V
C5
10u
50
+
3
R21
3
FB
Drain1
Drain2
rce2
Drain3
Drain4
LL414
D7
KME
F
C8
22n
4.7k
AS
VIPer12
Souource1
1
Sou
2
AM00644v1
2/6
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