VIPER37HE STMicroelectronics, VIPER37HE Datasheet - Page 17

• Manufacturer Part Number: VIPER37HE
• Description: AC/DC Switching Converters ViperPlus Fixed Freq 800V 30mQ 265 Vac
• Manufacturer: STMicroelectronics
• Type: Off Line Switcherr

Specifications of VIPER37HE

• Product Category: AC/DC Switching Converters
• Rohs: yes
• Input / Supply Voltage (max): 23.5 V
• Input / Supply Voltage (min): 8.5 V
• Switching Frequency: 115 kHz
• Supply Current: 3.5 mA
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: Through Hole
• Package / Case: SDIP-10
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 25 C
• Number Of Outputs: 1
• Output Power: 25 W

VIPER37
7
Efficiency performances for a typical flyback
converter
The efficiency of the converter has been measured in different load and line voltage
conditions. In accordance with the ENERGY STAR
method, the efficiency measurements have been performed at 25%, 50% and 75% and
100% of the rated output power, at both 115 V
Table 9.
Table 10.
Figure 22. Power supply consumption at light output loads, V
%Load
%Load
100%
100%
25%
50%
75%
25%
50%
75%
Power supply efficiency, V
Power supply efficiency, V
350
300
250
200
150
100
50
0
0.75
2.25
0.75
2.25
Iout
Iout
1.5
1.5
50
3
3
Average efficiency
Average efficiency
Doc ID 022218 Rev 1
100
Vout
Vout
Efficiency performances for a typical flyback converter
5.04
5.04
5.04
5.04
5.04
5.04
5.04
5.03
OUT
OUT
Input voltage [Vac]
150
= 5 V, V
11.34
15.12
11.34
15.09
Pout
Pout
= 5 V, V
3.78
7.56
3.78
7.56
AC
and 230 V
®
average active mode testing efficiency
IN
IN
200
= 230 V
= 115 V
14.84
20.04
14.67
19.59
AC
4.83
9.72
5.01
9.76
Pin
Pin
.
200mW
100mW
AC
50mW
30mW
AC
250
OUT
=5 V
Efficiency
Efficiency
300
78.26%
77.78%
76.42%
75.45%
76.97%
75.45%
77.46%
77.30%
77.03%
76.81%
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