august 2009 doc id 16146 rev 1 1/4 4 STEVAL-ISA058V1 5 w single output smps demonstration board based on the viper17 off-li ne high voltage converter features input voltage range: 90 v ac to 265 v ac_rms output voltage: 5 v maximum output current: 1 a rohs compliant description the STEVAL-ISA058V1 demonstration board is a 5 w off-line power supply designed as an evaluation platform for the viper17 offline high voltage converter. the viper17 features an 800 v rugged power section, pwm control, two levels of overcurrent protection, overvoltage and overload protection, hysteretic thermal protection, soft-start and safe auto-restart after fault condition removal. burst mode operation and the very low consumption of the device help to meet standby energy saving regulations. advance frequency jittering reduces emi filter cost. a brown-out function protects the switch mode power supply when the rectified input voltage level is below the normal minimum level specified for the system. a high voltage startup circuit is embedded in the device. STEVAL-ISA058V1 www.st.com
circuit schematic STEVAL-ISA058V1 2/4 doc id 16146 rev 1 1 circuit schematic figure 1. schematic diagram ! - v 6 ! # u & |