MC44608集成电路（IC）的ACDC转换器离线开关规格书PDF中文资料

MC44608属于集成电路（IC）的ACDC转换器离线开关。由安森美半导体公司制造生产的MC44608AC 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。

The MC44608 is a high performance voltage mode controller designed for off−line converters. This high voltage circuit that integrates the startup current source and the oscillator capacitor, requires few external components while offering a high flexibility and reliability.

The device also features a very high efficiency standby management consisting of an effective Pulsed Mode operation. This technique enables the reduction of the standby power consumption to approximately 1.0 W while delivering 300 mW in a 150 W SMPS.

General Features

• Integrated Startup Current Source

• Lossless Off−Line Startup

• Direct Off−Line Operation

• Fast Startup

• Flexibility

• Duty Cycle Control

• Undervoltage Lockout with Hysteresis

• On Chip Oscillator Switching Frequency 40 or 75

• Secondary Control with Few External Components

• Pb−Free Packages are Available*

Protections

• Maximum Duty Cycle Limitation

• Cycle by Cycle Current Limitation

• Demagnetization (Zero Current Detection) Protection

• “Over VCC Protection” Against Open Loop

• Programmable Low Inertia Over Voltage Protection Against Open Loop

• Internal Thermal Protection

SMPS Controller

• Pulsed Mode Techniques for a Very High Efficiency Low Power Mode

• Lossless Startup

• Low dV/dT for Low EMI Radiations