STEVAL-ISA103V1 Wide range (90 V - 265 V) input, 5 V - 12 W output demonstration board with improved standby performance based on VIPER27LN Data brief − preliminary data Features ■ Vin: 90 V - 265 V ■ Vout: 5 V ■ Pout: 12 W ■ Very low standby consumption ■ Overload protection ■ Secondary winding short-circuit protection ■ Output overvoltage protection ■ Brownout protection ■ ENERGY STAR® compliant ■ RoHS compliant Description The STEVAL-ISA103V1 is a wide range input demonstration board based on the VIPER27LN and suitable for several consumer applications, such as LCD or plasma TVs, some models of DVD recorders, set-top boxes with hard disk, and also desktop computers. The STEVAL-ISA103V1 includes two modules: the main power supply that provides most of the power and is off when the application is in standby mode and the auxiliary power supply that provides energy for specific peripherals such as USB ports, remote receivers, and modems. The auxiliary power supply is also on when the application is in standby mode and it is often required that its input power be as low as possible. The STEVAL-ISA103V1meets the specifications of a wide range of auxiliary power supplies for the above mentioned applications and is optimized for very low standby consumption, helping to meet the most stringent energy-saving requirements. March 2012 Doc ID 022894 Rev 1 This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice. For further information contact your local STMicroelectronics sales office. 1/4 www.st.com 4 Circuit schematic STEVAL-ISA103V1 1 Circuit schematic Figure 1. Circuit schematic 7 %5 & .( X) 9 %5,' *( ' ' 5 & 9$ 6736 677+/ S) 9 0HJ / X+ ' & & =/X) 9 ' 1 7 X) 9< . =/X) 9 %$7 75$16)250(5 5 5 0HJ & < Q) 0HJ 5 & ' ;& $3 &21 & - 5 N 5 &0& KRNH N & ; 5 N 3& 5 &21752/ X) 9 & & &217 )% Q 5 95 N & 5 Q) N 76 & ' 5 N N Q) 6285&( W 9] 5 2372 %5 17& '5$,1 & $)8 6( 2KP1 7& 9'' - ) 8 -8 03(5 9,3(5/1 Q) 5 5 N N - &21 $0Y 2/4 Doc ID 022894 Rev 1 STEVAL-ISA103V1 2 Revision history Revision history Table 1. Document revision history Date Revision 08-Mar-2012 1 Changes Initial release. Doc ID 022894 Rev 1 3/4 STEVAL-ISA103V1 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. 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