VIPER28中文资料VIPerPlus系列：峰值功率固定频率离线高压转换器数据手册ST规格书

描述 Description

The device is a high-voltage converter that smartly integrates an 800 V rugged power MOSFET with PWM current-mode control.This IC is capable of meeting more stringent energy-saving standards as it has very low consumption and operates in burst mode under light load. The device features an adjustable extra power timer (EPT) that enables the IC to sustain overload conditions for a few seconds. The integrated HV startup, sense FET and oscillator with jitter allow the advantage of using minimal components in the application. The device features high-level protections like dual-level OCP, output overvoltage, short-circuit, and thermal shutdown with hysteresis. After the removal of a fault condition, the IC is automatically restarted.

特性 Features

• 800 V avalanche-rugged power MOSFET allowing achieving ultra wide-range input Vac
• Embedded HV startup and sense FET
• PWM current-mode controller
• OCP with selectable threshold (IDlim) and 2ndOCP with higher value (IDMAX) to protect the IC from transformer saturation or short-circuit of the secondary diode
• 30 mW no-load consumption at 230 Vac
• Two operating frequencies:
•60 kHz (L type) or 115 kHz (H type)
• Jittered frequency reduces the EMI
• Extra power timer (EPT) blanks the overload current for few seconds
• Output overvoltage protection with tight tolerance and digital noise filter
• Soft-start reduces the stress during startup and increases IC lifetime
• Automatic restart after a fault condition
• Thermal shutdown increases system reliability and IC lifetime

简介

VIPER28属于集成电路（IC）的ACDC转换器离线开关。由ST制造生产的VIPER28AC DC 转换器，离线开关该系列是元器件级控制产品，用于构建将交流市电转换为直流电（通常电压大幅降低）的设备。集成和未集成系统主要开关元件的器件均包括在内。由于高输入输出电压比，以及此类系统中通常需要隔离，这些器件通常与外部变压器配合使用。尽管通常使用定制变压器来实现此用途，但也有许多专门用于此用途的库存产品，请参见“开关转换器，SMPS 变压器”标题。