FSDH321集成电路（IC）的ACDC转换器离线开关规格书PDF中文资料

FSDH321属于集成电路（IC）的ACDC转换器离线开关。由安森美半导体制造生产的FSDH321AC 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。

描述 Description

Each product in the FSDx321 (x for H, L) family consists of an

integrated Pulse Width Modulator (PWM) and SENSEFET, and is

specifically designed for high performance offline Switch Mode

Power Supplies (SMPS) with minimal external components. Both

devices are integrated high voltage power switching regulators which

combine an avalanche rugged SENSEFET® with a current mode

PWM control block. The integrated PWM controller features include:

a fixed oscillator with frequency modulation for reduced EMI, Under

Voltage Lock Out (UVLO) protection, Leading Edge Blanking (LEB),

an optimized gate turn−on/turn−off driver, Thermal Shut Down (TSD)

protection, Abnormal Over Current Protection (AOCP) and

temperature compensated precision current sources for loop

compensation and fault protection circuitry. When compared to a

discrete MOSFET and controller or RCC switching converter

solution, the FSDx321 devices reduce total component count, design

size, weight while increasing efficiency, productivity and system

reliability. Both devices provide a basic platform that is well suited for

the design of cost−effective flyback converters

特性 Features

• Internal Avalanche Rugged SENSEFET

• Consumes only 0.65 W at 240 VAC & 0.3 W Load with Advanced

Burst−Mode Operation

• Frequency Modulation for EMI Reduction

• Precision Fixed Operating Frequency

• Internal Start−up Circuit

• Pulse−by−Pulse Current Limiting

• Abnormal Over Current Protection (AOCP)

• Over Voltage Protection (OVP)

• Over Load Protection (OLP)

• Internal Thermal Shutdown Function (TSD)

• Auto−Restart Mode

• Under Voltage Lockout (UVLO)

• Low Operating Current (max. 3 mA)

• Adjustable Peak Current Limit

• Built−in Soft Start

Applications

• SMPS for STB, Low Cost DVD Player

• Auxiliary Power for PC

• Adapter & Charger