STEVAL-VP12201B STMicroelectronics

STEVAL-VP12201B Data brief 15 V/200 mA buck converter based on VIPER122 Features Universal input mains range: 85265 V AC Frequency: 50-60 Hz Output voltage: 15 V Output current: 200 mA Very compact size Stand-by mains consumption: < 30mW at 230 V AC Average efficiency: > 77% Tight line and load regulation over the entire input and output range Meets IEC55022 Class B conducted EMI even with reduced EMI filter, thanks to the frequency jittering feature WEEE compliant RoHS compliant Description The STEVAL-VP12201B evaluation board implements a 15 V-3 W buck converter mains designed for general purpose applications, operating from 85 to 265 V . AC It is built around the VIPER122 offline high-voltage converter of the VIPerPlus family with a 730 V Power MOSFET and PWM current mode control. The STEVAL-VP12201B features include its small size and minimal BOM, high efficiency, low standby consumption, and tight line and load regulation over the entire Product summary input and output range. 15 V/200 mA buck Burst mode operation allows extremely low consumption under no load and reduces STEVAL- converter based on VP12201B the average switching frequency to minimize all frequency related losses. VIPER122 VIPER122 operates at a fixed frequency of 60 kHz with frequency jittering to meet High voltage converter VIPER122 electromagnetic disturbance standards. DB3988 - Rev 1 - September 2019 www.st.com For further information contact your local STMicroelectronics sales office.STEVAL-VP12201B Schematic diagram 1 Schematic diagram Figure 1. STEVAL-VP12201B circuit schematic Daux BAT41ZFILM R1 D0 D1 L1 R4a 71.5k AC IN 22 MRA4007 MRA4007 1mH IC1 VIPer122 EA-IN DRAIN R4b 11k C7 C1 CONTROL 2.2uF VCC 15F - 400V D4 R3 C4 GND EA-OUT STTH1L06A 22k N.A. R2 C2 C3 17.4k C5 2.2F 100nF C6 1.2nF AC IN 470nF L2 15V-0.2A 1mH D5 C8 Rbl STTH1L06A 150F 33k GND DB3988 - Rev 1 page 2/7