MC34023P集成电路（IC）的ACDC转换器离线开关规格书PDF中文资料

MC34023P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MC34023PAC 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。

High Speed Single−Ended PWM Controller

The MC34023 series are high speed, fixed frequency, single−ended pulse width modulator controllers optimized for high frequency operation. They are specifically designed for Off−Line and

DC−to−DC converter applications offering the designer a cost−effective solution with minimal external components. These integrated circuits feature an oscillator, a temperature compensated

reference, a wide bandwidth error amplifier, a high speed current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET.

Features

• 50 ns Propagation Delay to Output

• High Current Totem Pole Output

• Wide Bandwidth Error Amplifier

• Fully−Latched Logic with Double Pulse Suppression

• Latching PWM for Cycle−By−Cycle Current Limiting

• Soft−Start Control with Latched Overcurrent Reset

• Input Undervoltage Lockout with Hysteresis

• Low Startup Current (500 μA Typ)

• Internally Trimmed Reference with Undervoltage Lockout

• 90 Maximum Duty Cycle (Externally Adjustable)

• Precision Trimmed Oscillator

• Voltage or Current Mode Operation to 1.0 MHz

• Functionally Similar to the UC3823

• Pb−Free Packages are Available*