steval - isa115v1 12 v, 150 ma non - isolated buck converter using viper ? plus - viper06xs data brief features ? universal input mains range: ? input voltage: 90 vac - 264 vac ? frequency: 45 hz - 65 hz ? single - output voltage: 12 v @ 0.15 a continuous operation ? standby mains consumption: < 50 mw @ 265 vac ? average efficiency: > 75% ? fully protected against faults (overload, feedback disconnection and overheating) ? emi: in accordance with en55022 - class - b ? rohs compliant description the steval - isa115v1 evaluation board is a 12 v / 0.1 5 a power supply set in buck topology with the viper06xs, a new off - line high voltage converter by stmicroelectronics. the features of t he device include an 800 v avalanche rugged power section, pwm operation at 30 khz with frequency jittering for lower emi, current limiting with adjustable set point, onboard soft - start, a safe auto - restart after a fault condition and low standby power con sumption. available protection features include thermal shutdown with hysteresis, delayed overload protection and open loop failure protection. all protection is auto - restart mode. ste v al-isa 1 15v1 may 2014 docid024373 rev 2 1 / 4 for further information contact your local stmicroelectronics sales office www.st.com
schematic steval - isa115v1 1 schematic figure 1 : schematic diagram l 2 c 8 r 5 a r 5 b r 4 b r 4 a r b l c f b f b d r a i n gn d v d d c o m p l i m d r a i n d r a i n d r a i n d r a i n c c c 7 r 3 r 6 r 1 c 2 l 1 g n d a c i n c 1 c 3 d 1 c f d 4 d au x g n d c 9 vou t d 3 viper06xs 2 / 4 docid024373 rev 2
steval - isa115v1 revision history 2 revision history table 1: document revision history date revision changes 22- apr- 2013 1 first release. 08- may -2014 2 title has been updated. docid024373 rev 2 3 / 4
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