STEVAL-ISA115V1 STMicroelectronics

STEVAL-ISA115V1 12 V, 150 mA non-isolated buck converter using VIPer Plus - VIPER06XS Data brief 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 STEVAL-ISA115V1 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 May 2014 DocID024373 Rev 2 1/4 www.st.com For further information contact your local STMicroelectronics sales office Schematic STEVAL-ISA115V1 1 Schematic Figure 1: Schematic diagram 2/4 DocID024373 Rev 2 Daux R5b R5a AC IN D1 R1 L1 DRAIN DRAIN DRAIN DRAIN DRAIN VIPER06XS C1 C2 C8 GND VDD LIM FB COMP D3 R4a CFB C3 CF R4b R6 R3 CC C7 L2 Vout D4 C9 GND Rbl GND