Fairchild FAN6240同步整流控制解决方案
Fairchild公司的FAN6240是用于反激拓扑转换器和正向续流整流的同步整流(SR)控制器,输出电压5V-24V,超低绿色模式工作电路,典型值为1.1mA,带次级绕组电压检测的PWM频率跟踪,主要用在AC/DC 笔记本电脑适配器,开架开关电源和电池充电器.本文介绍了FAN6240主要特性,方框图以及两种典型应用电路.
FAN6204: Synchronous Rectification Controller for Flyback and Forward Freewheeling Rectification
FAN6204 is a secondary-side synchronous rectification (SR) controller to drive SR MOSFET for improving efficiency. The IC is suitable for flyback converters and forward free-wheeling rectification.
FAN6204 can be applied in continuous or discontinuous conduction mode (CCM and DCM) and quasi-resonant (QR) flyback converters based on the proprietary innovative linear-predict timing-control technique. The benefits of this technique include a simple control method without current-sense circuitry to accomplish noise immunity.
With PWM frequency tracking and secondary-side winding voltage detection, FAN6204 can operate in both fixed- and variable-frequency systems.
In Green Mode, the SR controller stops all SR switching operation to reduce the operating current. Power consumption is maintained at minimum level in lightload condition.
FAN6240主要特性:
SR Controller
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