STEVAL-VP319X1B Buck Converter Reference Design
Author: EIS Release Date: Jan 11, 2021
STMicroelectronics' compact buck converter evaluation board features minimal BOM, high efficiency, and low standby consumption
STMicroelectronics' compact 5 V / 3 W buck converter evaluation board features minimal BOM, high efficiency, and low standby consumption from 85 VAC to 265 VAC input, which can be widened to 40 VAC to 265 VAC by increasing the input bulk capacitor size. The design is based on the VIPERP319X offline high-voltage converter with 800 V avalanche-rugged power MOSFET, PWM current-mode control, fixed 30 kHz switching frequency with jittering, and burst mode for light load management.
Features
- Universal input mains range: 85 VAC to 265 VAC
- Frequency: 50 Hz to 60 Hz
- Output voltage: 5 V
- Output current: 0.6 A
- Input power consumption in no load condition: <16 mW at 230 VAC
- 4-point average active mode efficiency at full load: >69.7% (compliant with European CoC ver. 5)
- 4-point average active mode efficiency at 10% full load: >60.58% (compliant with European CoC ver. 5)