STEVAL-ISA004V1
VIPer22A-E dual-output evaluation board with 90 to 264 VAC input and 10 W output
Data Brief
Features
Switch-mode general-purpose power supply Input: 90 to 264 VAC 50/60 Hz Output: 12 V @ 0.42 A and 5 V @ 1 A Burst-mode operation in standby for Blue Angel operation Current mode control Switching frequency: 60 kHz 75% efficiency Auxiliary undervoltage lockout with hysteresis Output short-circuit protection Thermal shutdown protection Meets EN55022 Class B EMI specification STEVAL-ISA004V1
Description
This evaluation board is an offline, wide-range, VIPer22A-E dual-output power supply with a switching frequency of 60 kHz and is set up for secondary regulation with an optocoupler. One output delivers 5 V at 1 A and a second output delivers 12 V at 0.42 A, making for a total output power of 10 W. The evaluation board meets Blue Angel Norms, consuming less than 1 W total when working in standby mode. The board operates in burst mode when both the output loads are reduced to zero and the output voltages still remain regulated.
November 2007
Rev 1
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www.st.com 4
For further information contact your local STMicroelectronics sales office.
1
1
Board schematic
J1 1 2 2 BR 1 KB P 2 1 0 G D I . W1 D1 1N 41 48
0 0
4
U1 VIP e r 2 2 A
1
3
C6 2 2 nF 50 V
0
2
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Board schematic
Figure 1.
L1 3 0mH 1 . 10 u H . C3 10 0 p F 1k V 2 3 . . . B YW 1 0 0 - 2 0 0 4 . C8 4 .7 n F Y1 cap 7 C9 2 2 0u F 2 5V 8 D3 C1 2 10 uF 40 0V C2 22u F 4 00V R2 2k 0 .5 W 6 C5 6 8 0 uF 25V C7 1 0 0u F 2 5V . 5 L2
T1 C VP 3 2 -0 0 2
D2 1N 58 21
L 4 3
R1 5 oh m s 1W
F US E 0 .5 A 5 X2 0 m m 2 50V F1
5V GND 12 V @ 0.42A R9 15 k 0. 5W 12V Rtn
Schematic
1 2 3 4 J2 C ON 4
C1 0 .0 4 7 u F
C ON 2 85 to 264Vac 0 R7 4 9 .1 k
N 2 X 30 m H 1 2 C4 2 2u F 2 5V S o u rc e S o u rc e b F 3
8 7 6 5 D ra i n D ra i nVd d D ra i n D ra i n
R4 68 R6 47 0 U2 H 11A817 A R8 2 .4 9 k 1%
U3 TL4 31 ST
C 11 0 .0 1 u F 5 0V R5 2 .4 3 k 1%
STEVAL-ISA004V1
All resistors are 1/4 W 5% unless specified. All capacitors are in uF and 50 V unless spe cifie d.
STEVAL-ISA004V1
Revision history
2
Revision history
Table 1.
Date 28-Nov-2007
Document revision history
Revision 1 Initial release Changes
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STEVAL-ISA004V1
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