STEVAL-ISA211V1

STEVAL-ISA211V1 flyback converter is designed for industrial or photovoltaic sectors to be used as an auxiliary power supply. The 24V/100W output with reinforced isolation can be used in several applications. The input voltage range starts from standard Europe voltage (230VAC) and ends at 690VAC or 1KVDC. For short-time periods or lower output power, the converter can operate with voltage decreased down to 150VDC. The STEVAL-ISA211V1 is based on the L6566BH multi-mode controller and STW12N170K5 1700V MDmesh K5 Power MOSFET, in one-switch Flyback topology with isolated output. L6566BH integrates 840V high voltage start-up which is boosted by the STD1NK60T4 Power MOSFET up to 1KV. The converter operates in fixed-frequency mode but it can be easily set to quasi-resonant mode by changing one resistor.

• Wide input voltage range from 230 to 690VAC, 250 to 1000VDC
• Short time undervoltage (long time for 50W output) down to 150VDC/180VAC
• Selectable fixed-frequency or quasi-resonant operation
• Embedded 1KV high voltage start-up
• Modified soft-start circuit
• Optional brownout protection