OB6663 is a monolithic IC which integrates a transition mode power factor correction (TM PFC) controller and a Quasi-Resonant (QR) controller. TM PFC provides low system cost solutions with low harmonic distortion and high power factor. QR provides higher efficiency and lower EMI compared to conventional PWM system. The built-in advanced energy saving with high level protections of OB6663 makes it a best candidate for power supplies which need PFC function.
Features:
◆ Integrated transition mode (TM) PFC controller and Quasi-Resonant (QR) PWM controller
◆ Built-in dual output PFC control
◆ Adjustable PFC ON/OFF control
◆ Meet EPS2.0 with less than 300mW standby power consumption
◆ Multi-Mode operation for QR stage
◆ Analog multiplier with built-in THD optimizer for PFC stage
◆ Line feed-forward compensation for PFC stage
◆ Quick startup and enhanced dynamic response for PFC stage
◆ PFC burst mode when light loading and low line input
◆ Minimum QR short circuit power consumption
◆ Audio noise free operation
◆ Available in SOP16 and DIP16 packages,RoHS compliant
Applications:
◆ Notebook Adapter
◆ Open-frame SMPS
◆ White Goods
Typical Application:
昂宝系列产品原装现货供应 了解详情可联系深圳市瑞新盛科技有限公司 联系人：杨生13823608717 QQ：1732328706
光耦(opticalcoupler)亦称光电隔离器、光耦合器或光电耦合器。它是以光为媒介来传输电信号的器件，通常把发光器(红外线发光二极管LED)与受光器(光敏半导体管)封装在同一管壳内。当输入端加电信号时发光二极管发出光线，光敏三极管接受光线之后就产生光电流，从输出端流出，从而实现了“电—光—电”转换。典型应用电路如下图1-1所示。
光耦(opticalcoupler)亦称光电隔离器、光耦合器或光电耦合器。它是以光为媒介来传输电信号的器件，通常把发光器(红外线发光二极管LED)与受光器(光敏半导体管)封装在同一管壳内。当输入端加电信号时发光二极管发出光线，光敏三极管接受光线之后就产生光电流，从输出端流出，从而实现了“电—光—电”转换。典型应用电路如下图1-1所示。
光耦的主要优点是：信号单向传输，输入端与输出端完全实现了前端与负载完全的电气隔离，输出信号对输入端无影响，减小电路干扰，简化电路设计，工作稳定，无触点，使用寿命长，传输效率高。光耦合器是70年代发展起来的新型器件，现已广泛用于电气绝缘、电平转换、级间耦合、驱动电路、开关电路、斩波器、多谐振荡器、信号隔离、级间隔离、脉冲放大电路、数字仪表、远距离信号传输、脉冲放大、固态继电器(SSR)、仪器仪表、通信设备及微机接口中。在单片开关电源中，利用线性光耦合器可构成光耦反馈电路，通过调节控制端电流来改变占空比，达到精密稳压目的。
