AP31261中文资料Green Mode PWM Controller数据手册Diodes规格书

描述 Description

The AP31261 is a current mode PWM controller which is optimized
for high performance, low standby power and cost effective offline
flyback converters.
The PWM switching frequency at normal operation is internally fixed
(about 65kHz). In middle load, the IC will enter green mode to
improve system efficiency with the help of frequency foldback. A
minimum switching frequency (about 20kHz) is set to avoid the
audible noise. In no load or light load, the IC will enter the burst mode
to minimize standby power. Furthermore, the frequency dithering
function is built-in to reduce EMI emission. Internal slope compensation allows more stable Peak-Current Mode
control over wide range of input voltage and load conditions. Internal line compensation ensures constant output power limit over entire universal line voltage range. Comprehensive protection features are included, such as cycle-bycycle current limit (OCP), VCC Over Voltage Protection (VOVP), internal OTP, Over Load Protection (OLP) and pins’ fault protection.

特性 Features

Very Low Start-up Current
Current Mode Control
Non-audible-noise Green-mode Control
Internal Slope Compensation
Soft Start During Startup Process
Frequency Fold Back for High Average Efficiency
Secondary Winding Short Protection with FOCP
Soft Switching for Reducing EMI
VCC Maintain Mode
Useful Pin Fault Protection:
     SENSE Pin Floating
     CTRL Pin Short to Ground
     FB/Opto-coupler Open/Short
Comprehensive System Protection Feature:
     VCC Over Voltage Protection (VOVP)
     Over Load Protection (OLP)
Mini Size Package of SOT26
Pin to Pin Compatible with AP3125A/V/R/L
Totally Lead-free & Fully RoHS Compliant
Halogen and Antimony Free. “Green” Device

应用 Application

Switching AC-DC Adapter/Charger
ATX/BTX Auxiliary Power
Set-top Box (STB) Power Supply
Open Frame Switching Power Supply

简介

AP31261属于集成电路（IC）的ACDC转换器离线开关。由制造生产的AP31261AC 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。