Description
The STEVAL-ISA115V1 evaluation board is a 12
V / 0.15 A power supply set in buck topology with
the VIPER06XS, a new off-line high voltage
converter by STMicroelectronics.
The features of the device include an 800 V
avalanche rugged power section, PWM operation
at 30 kHz with frequency jittering for lower EMI,
current limiting with adjustable set point, onboard
soft-start, a safe auto-restart after a fault
condition and low standby power consumption.
Available protection features include thermal
shutdown with hysteresis, delayed overload
protection and open loop failure protection. All
protection is auto-restart mode.

Features
• Universal input mains range:
− input voltage: 90 VAC - 264 VAC
− frequency: 45 Hz - 65 Hz
• Single-output voltage: 12 V @ 0.15 A
continuous operation
• Standby mains consumption: < 50 mW @
265 VAC
• Average efficiency: > 75%
• Fully protected against faults (overload,
feedback disconnection and overheating)
• EMI: in accordance with EN55022-Class-B
• RoHS compliant