MC34023数据手册集成电路（IC）的ACDC转换器离线开关规格书PDF

描述 Description

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.\r
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Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle-by-cycle current limiting, and a latch for single pulse metering.\r
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The flexibility of this series allows it to be easily configured for either current mode or voltage mode control.

特性 Features

• 50 ns Propagation Delay to Output\r
• High Current Totem Pole Output\r
• Wide Bandwidth Error Amplifier\r
• Fully-Latched Logic with Double Pulse Suppression\r
• Latching PWM for Cycle-By-Cycle Current Limiting\r
• Soft-Start Control with Latched Overcurrent Reset\r
• Input Undervoltage Lockout with Hysteresis\r
• Low Start-Up Current (500 µA Typ)\r
• Internally Trimmed Reference with Undervoltage Lockout\r
• 90% Maximum Duty Cycle (Externally Adjustable)\r
• Precision Trimmed Oscillator\r
• Voltage or Current Mode Operation to 1.0 MHz\r
• Functionally Similar to the UC3823\r
• Pb-Free Packages are Available

简介

MC34023属于集成电路（IC）的ACDC转换器离线开关。由制造生产的MC34023AC 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。