VIPER35中文资料VIPerPlus系列：准谐振高性能离线高压转换器数据手册ST规格书

描述 Description

VIPER35 is a high voltage converter, which smartly integrates an 800 V rugged power MOSFET with a quasi-resonant current mode PWM control. This IC meets severe energy saving standards as it has very low consumption and operates in burst mode under light load conditions.

The VIPER35 features the brown-out enabling the IC to set the switch-off and switch-on threshold independently one of each other. The quasiresonant operation reduces the level of EMI and the quantity of components in the application.

The quasi-resonant operation reduces the switching losses and improves power conversion efficiency. The device features high level protections such as: output overvoltage, shortcircuit 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 ultra wide range input VAC to be achieved
• Embedded HV start-up and senseFET
• Built-in soft-start
• Quasi-resonant current mode PWM controller with drain current limit (IDlim)
• Multifunction ZCD pin:
•Zero-current detection
•OCP threshold (IDlim) setup
•Output OVP (auto-restart)
•Feed-forward compensation
• Support isolated flyback topology with optocoupler
• Frequency limit:
•136 kHz (L type), 225 kHz (H type)
• Less than 30 mW @ 230 VACin no-load condition
• Brown-out set through resistor divider
• Short-circuit protection (auto-restart)
• Hysteretic thermal shutdown

简介

VIPER35属于集成电路（IC）的ACDC转换器离线开关。由制造生产的VIPER35AC 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。