data brief for further information contact your local stmicroelectronics sales office. september 2010 doc id 18014 rev 1 1/4 4 STEVAL-ISA011V1 viper12adip-e low power ac/dc adapter demonstration board (suitable for the steval-ill002v1) features minimum ac input voltage = 88 vrms maximum ac input voltage = 265 vrms max output power = 4.1 w output voltage = 4.5 v max output current = 900 ma efficiency (at full load and 230 vac) = 70 % efficiency (at full load and 115 vac) = 70 % description the STEVAL-ISA011V1 demonstration board is a low power (4.1 w output), general purpose adapter. the design is based on the viper12adip-e monolithic device which, in the same package, integrates the high voltage power switch and the basic control function needed for a current mode flyback converter. the board can handle a wide range ac input voltage, from 88 vac to 265 vac, with one output voltage of 4.5 v delivering a maximum output current of 900 ma. the main applications for this board are auxiliary power supplies and wall-plug adapters. STEVAL-ISA011V1 www.st.com
schematic circuit STEVAL-ISA011V1 2/4 doc id 18014 rev 1 1 schematic circuit figure 1. steval-isa011v evaluation board schematic 5 n 5 n - 9 $ & q ) < n 5 & q ) 8 9 l s h u $ 6 6 ) % 9 ' ' ' ' ' ' & ? ) ' 6 7 7 + 5 & s ) 9 & e ? ) 9 5 n : ' 6 7 3 6 8 7 8 3 & & ? ) & ; f d s 8 7 / ) p $ - & 2 1 ' $ 9 % u l g j h 1 7 & & d ? ) 9 / p + 5 n 5 n ' 1 5 ( & q ) 5 n 5 & p ) 9 0 % = 5 x e \ f r q 3 u h f l v l r q 5 h v l v w r u 3 u h f l v l r q 5 h v l v w r u $ ,
STEVAL-ISA011V1 revision history doc id 18014 rev 1 3/4 2 revision history table 1. document revision history date revision changes 23-sep-2010 1 initial release.
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