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 $ & |