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Evaluation board implements a 5 V – 1.8 W isolated flyback converter
The STEVAL-VP22201B evaluation board implements a 5 V – 1.8 W isolated flyback converter developed for general purpose applications operating from 85 to 265 VAC.
The reference design is built around the VIPer222XSTR offline high-voltage converter from the VIPerPlus family, with 730 V Power MOSFET and PWM current-mode control.
The main characteristics of the evaluation board are its small size and minimal BOM, low stand-by consumption and tight line and load regulation over the entire input and output range. Extremely low consumption under no-load condition is ensured thanks to burst mode operation that reduces the average switching frequency and minimizes all frequency related losses.
Key Features
- Universal input mains range: 85–265 VAC
- Frequency: 50-60Hz
- Output voltage: 5 V
- Output current: 360 mA
- Very compact size
- Stand-by mains consumption: < 18mW at 230 VAC
- 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
- RoHS compliant
VIPer222XSTR operates at 30 kHz fixed frequency with frequency jittering to enable compliance with standards regarding electromagnetic disturbance.
more information: www.st.com
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