AP3103A中文资料Cost Effective Green PWM Controller数据手册Diodes规格书

描述 Description

The AP3103A is a low startup current, current mode ofline PWM controller with green-mode power-saving operation. The PWM switching frequency at normal operation is externally programmable and is trimmed to a tight range. The dithering of frequency will also improve the EMI feature. When the load decreases, the frequency will reduce and when at a very low load, the IC will enter the „burst mode‟ to minimize switching loss.

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\tAbout 20kHz frequency switching is to avoid the audible noise as well as reducing the standby loss. The skip mode point can be adjusted through the external resistor connected to the current sense resistor.

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\tThe AP3103A features a lot of functions such as the Leading-Edge Blanking (LEB) of the current sensing, internal slope compensation and several protection functions including cycle-by-cycle current limit (OCP), VCC Over Voltage Protection (VOVP) and OLP protection.

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\tThis IC is available in SOT26 package.

应用 Application

Switching AC-DC Adapter/Charger
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\t\tATX/BTX Auxiliary Power
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\t\tSet-top Box (STB) Power Supply
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\t\tOpen Frame Switching Power Supply


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\t\t\t\tProduct Specifications

简介

AP3103A属于集成电路（IC）的ACDC转换器离线开关。由制造生产的AP3103AAC 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。