AP3781中文资料Primary Side Regulated Switching Mode Power Supply Controller数据手册Diodes规格书

描述 Description

The AP3781 is a high performance AC/DC power supply controller for battery charger and adapter applications. The controller regulates the output voltage and current in the primary side by Pulse Frequency Modulation in Discontinuous Conduction Mode (DCM).

The AP3781 operates in Pulse Frequency Modulation (PFM) mode and peak current Amplitude Modulation (AM) mode to form a fine tune frequency curve within the whole power range. Therefore, AP3781 can achieve high average efficiency and improve audible noise.

The AP3781 provides comprehensive protections without additional circuitry. It contains VCC over voltage protection, output over voltage protection, output under voltage protection, output short circuit protection, cycle-by-cycle current limit, open loop protection, external OTP and internal OTP, etc.

The AP3781 is packaged in SO-8.

特性 Features

•Primary Side Control for Eliminating Opto-Coupler
•75mW No-Load Input Power
•Flyback Topology in DCM Operation
•External Adjustable Over Temperature Protection
•Fixed Internal Cable Compensation: 3%
•External Cable Compensation: 3% to 8%
•Multiple Segment AM/PFM Control Mode to Improve Audio Noise and Efficiency
•Ultra Low Under Voltage Protection, Support Wide Operating Voltage for Power Tool Motor Drive
•Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
•Halogen and Antimony Free. “Green” Device (Note 3)
•For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/

应用 Application

• Routers

• Power Tools

• Set-Top Box (STB) Power Supply

• Smart Speakers

• Network Adaptors

简介

AP3781属于集成电路（IC）的ACDC转换器离线开关。由制造生产的AP3781AC 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。