STEVAL-ISA012V1

STEVAL-ISA012V1 reference design represents a cost effective solution for low power high voltage power supplies. The proposed solution consists of in an off line SMPS and a low cost front end regulation circuit for input voltage limiting. Such a circuit allows proper operation of the power converter avoiding the use of voltage over-rated components. The circuit is suitable for any off line SMPS topology since it includes a switching transistor connected between the input rectifier and the DC bulk capacitor. The series switch limits the DC input voltage of the power converter by means of a suitable driving circuit; thus the SMPS primary transistor can be selected as a standard part as well as a smart power primary IC. It has been developed to cover applications requiring an ultra wide input voltage range(between 90V and 450V AC), typical of three phase applications.

• Minimum and maximum AC input voltage is 90VAC, 450VAC
• Time of hold up capability 50ms
• Mean input power 6W
• Input connections allows 1 phase with neutral, 2 phase without neutral, 3 phase with neutral
• VOUT1 is 5V, IOUT1 is 10mA
• VOUT2 is 3.3V, IOUT2 is 100mA
• Maximum precision error 3%
• Maximum ripple voltage 50mV
• Line regulation +/- 1%, Load regulation +/- 1%
• Output power (peak) 550mW

Applications

Power Management