Download STEVAL-ISA008V1

STEVAL-ISA008V1
Low cost wide range power supply for LCD or TV,
28 W output demonstration board based on the VIPer53-E
Data brief
Features
■
Input voltage
– Vin: 90 - 264 Vrms f: 45-66 Hz
■
Output voltages
– 3.3 V ± 2 % at 1 A - dedicated to panel and
digital circuitry for scaling
– 7 V ± 8 % at 0.2 A - dedicated to postregulator for microprocessor
– 12 V ± 8 % at 2 A - dedicated to backlight
lamp inverters, audio and SCART
– 35 V ± 10 % at 10 mA - dedicated to tuner
for TV-LCD
■
Standby
– Input power less than 1 W at 230 Vac,
delivering 30 mA on 7 V
■
Overcurrent protection
– On all outputs, with auto-restart at short
removal
■
PCB type & size
– Cu single side 35 mm, CEM-1, 130 x 70
mm
■
Safety
– According to EN60950, creepage and
clearance minimum distance 6.4 mm
■
Emc
– According to EN50022 Class B
■
RoHS compliant
Description
STEVAL-ISA008V1
The standby performance is very good, and the
power consumption during standby is 800 mW at
230 Vac.
The circuit is also fully protected against faults
such as output short-circuit or overvoltage.
The design pays particular attention to the final
cost of the solution, so the PCB has been
designed as single layer, and the circuit has no
heat sink. The technology used is the standard
through-holes, but can be easily changed to SMT
as most of the components are available also in
this technology. The circuit has been tested
thoroughly in all the most relevant aspects with
positive results and has been integrated with a
15" LCD-TV application without showing any
problems.
The STEVAL-ISA008V1 demonstration board is a
28 W switch mode power supply which can be
used to supply an LCD monitor or even an LCDTV, with 15" or 17" panels and 2 lamps for
backlight together with multimedia functions such
as audio. The SMPS accepts a full range input
voltage (90 to 265 Vrms) and can deliver four
output voltages dedicated to the scaler (3.3 V), to
the mP (7 V), to the backlight and audio (12 V),
and to the TV tuner (35 V).
November 2010
Doc ID 18217 Rev 1
For further information contact your local STMicroelectronics sales office.
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Circuit schematic
Figure 1.
Circuit schematic
CON1
MOLEX 2
F1
FUSE 2A
C3
220N
R1
NTC_16R S236
1
4
L2
20mH - SUMIDA
2
3
2
R14
470R
D4
DF06M
1
C20
220PF-2KV
D6
STTH106
C4
68uF-400V
C15
47uF-25V
D5
STTH106
R12
1R5
D2
1N4148
4
3
C2
1N0-Y1
14
T1
24140011_D
2
13
8
10
11
12
D7
1.5KE180A
4
6
7
9
C16
1N0
R11
47R
D8
STPS8H100CF
C11
1000uF-25V YXF
D9
BYW100-200
C17
470uF-16V YXF
D1
STPS3L60
C13
2200uF-6.3V YXF
C5
RES
R6
RES
R16
1K0
R4
4K7-1%
C14
100uF-25V YXF
L1
2.7uH ELC08D
C12
1000uF-25V YXF
R2
33K
R15
1K8
Q2
BC547B
R8
5K6
R9
RES
R10
180R
R3
1K5-1%
R7
RES
D3
1N4148
C7
100N
C8
100N
C9
100N
12V@2A
12V@2A
CON2
2
GND
GND
1
3
[email protected]
GND
3.3V@1A
3.3V@1A
6
8
7
5
4
CONN 8P
www.BDTIC.com/ST
2
1
90-264Vrms
R13
3K65-1%
OSC
1
C1
1N0-Y1
2
2
C18
10N
U3
VIPER53_DIP
4
R5
1K0
1
2
3
DRAIN
5
SOURCE
3
SOURCE
4
TOVL
4
COMP
1
7
VDD
C10
100N
C19
15NF
U1
SFH617A-2
C6
100N
3
U2
TL431
Q1
BC547B
Doc ID 18217 Rev 1
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STEVAL-ISA008V1
Circuit schematic
AM03293v1
STEVAL-ISA008V1
2
Revision history
Revision history
Table 1.
Document revision history
Date
Revision
15-Nov-2010
1
Changes
Initial release.
Doc ID 18217 Rev 1
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3/4
STEVAL-ISA008V1
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