描述 Description

The HF01B04 is a flyback regulator with Green Mode Operation. Its high efficiency feature over the entire input/load range meets the stringent world-wide energy-saving requirements.The HF01B04 is an integrated current mode controller with a 700V FET. Its valley switching detector ensures minimum Drain-Source voltage switching every cycle, per Quasi-resonant operation. When the output power falls below a given level, the regulator enters the burst mode to lower the stand-by power consumption.An internal minimum off time limiter prevents the switching frequency from exceeding 150 kHz, which is below the CISPR-22 EMI start limit. Internal 2.4ms soft start prevents the excessive inrush current during start upThe HF01B04 provides various protections, such as Thermal Shutdown (TSD), VCC Under Voltage Lockout (UVLO), Over Load Protection (OLP), Over Voltage Protection (OVP) and so on.HF01B04 is available in PDIP8-7B and SOIC8-7B packages.

特性 Features

? Internal Integrated 700V MOSFET
? High Level of Integration, Requires Very Few External Components
? Universal Input Voltage (85~265VAC)
? Quasi-Resonant Operation over the Entire Input and Load Range
? Maximum Switching Frequency Limited
? Valley Switching for High Efficiency and Better EMI Performance
? Active Burst Mode for Low Standby Power Consumption
? Internal High-Voltage Current Source for Start-Up
? Internal Soft Start
? Internal 320ns Leading Edge Blanking
? Thermal Shutdown (Auto Restart with Hysteresis)
? VCC Under Voltage Lockout with Hysteresis (UVLO)
? Over Voltage Protection
? Over Load Protection.
? No Load Consumption at 265Vac, HF01B04<30mW

簡介

HF01B04屬于集成電路（IC）的ACDC轉(zhuǎn)換器離線開關(guān)。由制造生產(chǎn)的HF01B04AC 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(shí)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。