STR-X6750B集成电路（IC）的ACDC转换器离线开关规格书PDF中文资料

STR-X6750B属于集成电路（IC）的ACDC转换器离线开关。由三垦电气株式会社制造生产的STR-X6750BAC 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。

General Descriptions

The STR-X6700 series products are power ICs for quasi-resonant type switching power supplies, incorporating a power MOSFET and a controller IC, The product achieves high efficiency and low noise power supply systems by the quasi-resonant operation and the bottom-skip quasi-resonant operation.

The STR-W6700 series products are the different package (TO-220F) versions.

Features

● Multi-Mode Control

The operation mode switching with three steps according to load conditions achieves the optimal high efficiency and low noise power supply systems across the full load range. (The confirmation of product number is necessary because some functions are different in each product.)

• In Standby (Under Standby Load Conditions):

－UVLO Intermittent Oscillation by low output voltage --- Switched by Standby Signal, or

－Auto Burst-Oscillation --- Switched Automatically

• Under Low to Middle Load Conditions: Bottom-Skip Quasi-Resonant Operation (Bottom-Skip QR)

• Under Middle to Rating (or Heavy) Load Conditions: Quasi-Resonant Operation (QR)

● Current-Mode Control

● Built-in PWM Oscillator

The PWM operates with the minimum frequency of around 22 kHz, until the quasi-resonant signal becomes valid, reduces the stress on components at startup and load-shorted.

● Soft-Start Function

● Step-Drive Function, reducing switching noise

● Built-in Maximum ON Time Limitation Circuit

The function limits the maximum ON time of power MOSFET, during the transitions at low input voltage, power ON/OFF.

● Input Compensation at Overcurrent

The function reduces the distortion of overcurrent operation point to AC input voltage change by adding three components.

● Built-in Avalanche Energy Guaranteed High-Voltage Power MOSFET

● Various Protections

Overcurrent Protection (OCP) -------------------------------Pulse-by-Pulse

Overload Protection (OLP)-----------------------------------Latch Shutdown

Overvoltage Protection (OVP)-------------------------------Latch Shutdown

Applications

Switching Power Supplies for Digital Consumer Equipment; LCD-TVs, PDP-TVs, CRT-TVs, etc., Home Appliances, OA Equipments, Industry Machines, Communication Devices, Others