AP3128中文资料HIGH-PERFORMANCE GREEN MODE PWM CONTROLLER数据手册Diodes规格书

描述 Description

The AP3128 is a peak-current control, multi-mode (QR+CCM) PWM controller optimized for high performance, low standby power and cost-effective offline flyback converters. At no load or light load, the IC will enter burst mode to minimize standby power consumption. The minimum switching frequency is set to avoid audible noise. When the load increases, the IC will enter QR mode with frequency foldback to improve system efficiency and EMI performance. The maximum switching frequency about 105kHz is set to clamp the QR frequency to reduce switching power loss. Furthermore, the frequency dithering function is built in to reduce EMI emission. Internal piecewise linear line compensation ensures constant output power limit over the entire universal line voltage range. Comprehensive protection features are included, such as brown-out protection, cycle-by-cycle current limit (OCP), VCC Overvoltage Protection (VOVP), Secondary-side Output OVP (SOVP) and UVP (SUVP), internal OTP, Overload Protection (OLP), and pins’ fault protection.

简介

AP3128属于集成电路（IC）的ACDC转换器离线开关。由制造生产的AP3128AC 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。