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AN4007 датащи(PDF) 31 Page - STMicroelectronics

номер детали AN4007
подробное описание детали  In several applications, such as LCD or plasma TVs
PDF  33 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4007 датащи(HTML) 31 Page - STMicroelectronics

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AN4007
Conclusions
Doc ID 022455 Rev 2
31/33
5
Conclusions
A 15 W wide range single-output flyback converter using the new VIPER37LE has been
introduced and the results given.
The presented flyback converter is suitable as an external adapter or as an auxiliary power
supply in consumer equipment. Special attention was paid to low load performance and the
bench results are good with very low input power in light load condition.
The efficiency performances were compared with the requirements fixed by both EC CoC
and DoE US EISA 2007 programs for external AC/DC adapters with very good results, the
measured Active mode efficiency is always higher with respect to the minimum required.
6
Demonstration tools and documentation
The VIPER37LE demonstration board order code is: EVLVIP37LE5V3A.
Further information about this product is available in the VIPER37 datasheet at www.st.com.
Table 6.
Temperature of key components (Tamb=25 °C, emissivity=0.95 for all
points)
Point
Reference
T [°C] at 115 VAC
T [°C] at 230 VAC
A
IC (VIPER37LE)
61.2
63.4
B
D1 (Transil clamp)
82.8
81.6
C
D2 (output diode)
44.1
45.0
D
TF (flyback transformer)
67.3
70.0
E
NTC (inrush limiter)
54.1
41.6



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