STEVAL-VP22201B

ST Microelectronics
AN5446 Application note STEVAL-VP22201B: 5 V/1.8 W 30 kHz buck demo with the VIPER222XSTR Introduction The STEVAL-VP22201B is a 5 V - 0.36 A power supply set in buck topology using the VIPER222XSTR off-line high voltage converter by STMicroelectronics, specifically developed for non-isolated SMPS. The device features: • A 730 V avalanche rugged power section Integrated HV-start-up current gen...
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AN5446 Application note STEVAL-VP22201B: 5 V/1.8 W 30 kHz buck demo with the VIPER222XSTR Introduction The STEVAL-VP22201B is a 5 V - 0.36 A power supply set in buck topology using the VIPER222XSTR off-line high voltage converter by STMicroelectronics, specifically developed for non-isolated SMPS. The device features: • A 730 V avalanche rugged power section Integrated HV-start-up current generator • • Onboard soft-start • PWM operation at 30 kHz with frequency jittering for lower EMI • Transconductance error amplifier with 1.2 V ±2% reference voltage Thanks to the advanced light load management and ultra-low consumption of the VIPER222XSTR internal blocks, the evaluation board input power consumption in no-load conditions can be reduced to less than 20 mW at 230 VAC, and the most stringent energy saving regulations in terms of active mode and light load efficiency can be achieved. IC protection features include: • Pulse skip mode to avoid flux-runaway during start-up • Delayed overload shutdown for safe fault condition management • Thermal shutdown All protections (except pulse skip mode) involve auto-restart mode. Figure 1. STEVAL-VP22201B top and bottom view AN5446 - Rev 1 - March 2020 For further information contact your local STMicroelectronics sales office. www.st.com PDF
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STEVAL-VP22201B: 5 V/1.8 W 30 kHz buck demo with the VIPER222XSTR - Application note The STEVAL-VP22201B is a 5 V - 0.36 A power supply set in buck topology using the new VIPER11 off-line high volt...

Дата модификации: 18.03.2020

Размер: 1.91 Мб

21 стр.

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