AP3988集成电路（IC）的ACDC转换器离线开关规格书PDF中文资料

AP3988属于集成电路（IC）的ACDC转换器离线开关。由美台半导体制造生产的AP3988AC 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。

描述 Description

The AP3988/89/90 is a performance enhanced power switcher for power supplies with better conversion efficiency, better voltage & current accuracy, and improved protection functions. Typical applications include charger, adapter for ADSL, home appliance power supply, LED lighting power supply and PC auxiliary power supplies. The controller regulates the output voltage and current in the primary side by piece-wise Pulse Frequency Modulation (pPFM) in discontinuous conduction mode (DCM). The system operating frequency reduces linearly from heavy load to light load in each interval of the p-PFM, and enters constant current mode when the load current equals to the maximum system output current.

特性 Features

• Primary Side Control for Eliminating Opto-coupler and

Secondary CV/CC Control Circuitry

• Built-in NPN Transistor with 700VCBO

• Low Start-up Current: 0.2A (Typ.)

• Internal Output Cable Voltage Drop Compensation

• Hiccup Function to Improve Short Circuit Protection

• Better Over Voltage Protection

• Better Over Temperature Protection

• Low Total Cost Solution

• Output Power Range (Note 1):

AP3988 for 5.5W Adapter

AP3989 for 8W Adapter

AP3990 for 12W Adapter

• Totally Lead-free & Fully RoHS Compliant (Note 2 & 3)

• Halogen and Antimony Free. “Green” Device (Note 4)

Applications

• Adapters

• Set Top Boxes

• Auxiliary Supplies

• Appliances