High Safety Pulsed Mode Standby GreenLine PWM Controller

The MC44604 is an enhanced high performance controller that is specifically designed for off−line and dc−to−dc converter applications. Its high current totem pole output is ideally suited for driving a power MOSFET.

Current Mode Controller

• Operation Up to 250 kHz Output Switching Frequency

• Inherent Feed Forward Compensation

• Latching PWM for Cycle−by−Cycle Current Limiting

• Oscillator with Precise Frequency Control

High Flexibility

• Externally Programmable Reference Current

• Secondary or Primary Sensing

• High Current Totem Pole Output

• Undervoltage Lockout with Hysteresis

Safety/Protection Features

• Overvoltage Protection Facility Against Open Loop

• Protection Against Short Circuit on Oscillator Pin

• Fully Programmable Foldback

• Soft−Start Feature

• Accurate Maximum Duty Cycle Setting

• Demagnetization (Zero Current Detection) Protection

• Internally Trimmed Reference

GreenLine Controller

• Low Startup and Operating Current

• Pulsed Mode Standby for Low Standby Losses

• Low dV/dT for Low EMI

Features

• Pb−Free Package is Available*

MC44604属于集成电路（IC） > AC DC 转换器，离线开关。安森美半导体公司制造生产的MC44604AC 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。