AN1539 STMicroelectronics, AN1539 Datasheet - Page 15

• Manufacturer Part Number: AN1539
• Description: VIPOWER: LOW COST UNIVERSAL INPUT SMPS FOR DIGITAL SET-TOP BOX BASED ON VIPER50
• Manufacturer: STMicroelectronics

3.4 THERMAL MEASUREMENTS
Temperature measurements have been performed in order to provide reliable operation conditions for all
the circuit components. In Table 6 the measured values with T
used in the board, mounted on the VIPer50.
Table 6: Temperature characterization
4. CONCLUSIONS
In this paper a low cost SMPS for Set-Top-Box has been introduced and analyzed. Thanks to VIPer
features the design and development of the power supply are really straightforward, yielding to a cost
effective solution. The built-in functions and protections of the VIPer reduce the external component
count, simplifying the circuit. Moreover, EMI behavior and thermal performance allow to use standard
components and materials for the PCB, keeping low the cost of the whole system.
The voltage regulation performance confirms the VIPer as the device of choice for low cost high
performance power supplies as required by the consumer market.
For further information please contact STMicroelectronics VIPower web site: www.st.com/vipower.
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No license is
granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are
subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products
are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
VIPer50
Transil
D6 (22V)
D8 (5V)
D9 (2.5V)
Transformer
Bridge
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T at 110V
66
97
66
75
55
44
54
ac
amb
=23ºC. Only one heatsink has been
AN1539 - APPLICATION NOTE
T at 220V
103
64
67
78
58
43
46
ac
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