VIPER20A-E中文資料Fixed frequency off line converter數(shù)據(jù)手冊ST規(guī)格書

描述 Description

All the devices are made using VIPower M0 Technology, combines on the same silicon chip a state-of-the-art PWM circuit together with an optimized, high voltage, Vertical Power MOSFET (700V/ 0.5A).
Typical applications cover offline power supplies with a secondary power capability of 10W in wide range condition and 20W in single range or with doubler configuration. It is compatible from both primary or secondary regulation loop despite using around 50% less components when compared with a discrete solution. Burst mode operation is an additional feature of this device, offering the ability to operate in stand-by mode without extra components.

特性 Features

Adjustable current limitation
Low stand-by current
Integrated start-up supply
Undervoltage lock-out with hysteresis
Adjustable switching frequency up to 200 kHz
Soft start and shutdown control
Current mode control
Internally trimmed zener reference
Over-temperature protection
Automatic burst mode operation in stand-by condition able to meet “blue angel” norm (<1w total power consumption)

簡介

VIPER20A-E屬于集成電路（IC）的ACDC轉(zhuǎn)換器離線開關(guān)。由ST制造生產(chǎn)的VIPER20A-EAC DC 轉(zhuǎn)換器，離線開關(guān)該系列是元器件級控制產(chǎn)品，用于構(gòu)建將交流市電轉(zhuǎn)換為直流電（通常電壓大幅降低）的設(shè)備。集成和未集成系統(tǒng)主要開關(guān)元件的器件均包括在內(nèi)。由于高輸入輸出電壓比，以及此類系統(tǒng)中通常需要隔離，這些器件通常與外部變壓器配合使用。盡管通常使用定制變壓器來實現(xiàn)此用途，但也有許多專門用于此用途的庫存產(chǎn)品，請參見“開關(guān)轉(zhuǎn)換器，SMPS 變壓器”標(biāo)題。