this is information on a product in full production. august 2012 doc id 023539 rev 1 1/4 4 STEVAL-ISA105V1 power supply for energy meter and power line modem based on the altair04-900 databrief features min. operating voltage v acmin : 90 v ac max. operating voltage v acmax : 265 v ac , 440 v max topology: quasi-resonant flyback converter, primary side regulation mains frequency fl: 50 hz +/-3 hz input/output isolation: yes, galvanic isolation >2.7 kv nominal output voltage: ? 5 v/70 ma nominal, 1 a max. ? 3.3 v/30 ma nominal, 150 ma max. ? 12 v/2 ma nominal, 100 ma max. ? 5 v_iso/2 ma nominal, 80 ma max. total output power p out : 1 w nominal, 7.5 w (during transmission mode) typical efficiency @ 230 v ac : > 75% output voltage pk-pk ripple: < 100 mv protection: short-circuit protection reflected voltage of transformer, v r : 100 v rohs compliant description the STEVAL-ISA105V1 demonstration board implements a power supply based on a quasi- resonant mode of operation using st primary side altair04-900 flyback switch. the altair04-900 is a high-voltage all-primary sensing switcher intended for operating directly from the rectified mains with minimum external parts. it combines a high-performance low voltage pwm controller chip and a 900 v avalanche- rugged power section in the same package. the controller is a current-mode specifically designed for offline quasi-resonant flyback converters. the device is capable of providing constant output voltage using all primary sensing feedback. this eliminates the need for the optocoupler, the secondary voltage reference, as well as the current sensor, while still maintaining quite accurate regulation. www.st.com
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STEVAL-ISA105V1 revision history doc id 023539 rev 1 3/4 2 revision history table 1. document revision history date revision changes 06-aug-2012 1 initial release.
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