ALTAIR Primary Sensing Off-line Converters

The ALTAIR05T-800 and the ALTAIR04-900 are the first devices in STMicro's ALTAIR family of all primary sense off line HV converters. Feedback using optocouplers is not required with the ALTAIR devices. The two initial HV converters feature avalanche rugged 800 V 14 Ω, and 900 V 19 Ω power stages. Quasi-resonant ZVS topology is employed for high efficiency. The extremely low standby power consumption of 30 mW to 60 mW enables the ALTAIR devices to meet stringent regulatory no load standards. From Universal 85 V_AC to 305 V_AC 5 W of output power in enclosed adapter like applications and 8 W in open frame configuration can be met.