data brief for further information contact your local stmicroelectronics sales office. june 2010 doc id 17294 rev 2 1/4 4 STEVAL-ISA071V1 4 w non-isolated, wide input-voltage range smps demonstration board based on the viper16 features input: ?v in : 85 - 264 v rms ? f: 45 - 66 hz output: ? 12 v dc 10% (referred to -5 v), 160 ma ?-5 v dc 4%, 400 ma maximum output power: 4 w (for eu range up to 6 w) standby: 70 mw at 230 vac short-circuit protected isolation: non-isolated; n connected to output gnd emi: in accordance with en55022 class b rohs compliant description the STEVAL-ISA071V1 switched-mode power supply (smps) demonstration board is dedicated to mains applications requiring -5 v and +7 v referred to neutral. the non-isolated smps is capable of delivering 4 w of output power over a wide input voltage range. this capability can also be applied to higher power outputs or different voltage ranges. the smps generates 5 v and 12 v. the 5 v can be used to supply the mcu, directly driving a triac connected to neutral, and the 12 v can be used to supply additional circuits, such as relays, oas, etc. STEVAL-ISA071V1 www.st.com
schematic diagram STEVAL-ISA071V1 2/4 doc id 17294 rev 2 1 schematic diagram figure 1. STEVAL-ISA071V1 circuit schematic $ . ' . $ 6
6 # u & 6 $ 3 4 4 ( , $ r a i n $ r a i n 3 6 $ $ & " # / - 0 , ) - 5 6 i p e r , 2 k $ 3 4 0 3 , * 6
6 * / u t p u t $ . $ 3 4 0 3 ( # u & 6 # u & 6 2 2 7 4 % & 2 . ! 2 k # n # n 2 k # n & 6 # u & 6 # u & 6 2 k 2 k , m ( $ . ! - v
STEVAL-ISA071V1 revision history doc id 17294 rev 2 3/4 2 revision history table 1. document revision history date revision changes 27-apr-2010 1 initial release. 11-jun-2010 2 updated title on cover page.
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