本文介绍了FSR2100主要特性,方框图,典型应用电路图(LLC谐振半桥转换器)以及采用FSFR2100的LLC谐振半桥转换器参考设计,主要特性和电路图。
Fairchild 公司的FSR2100是高度集成的高效半桥谐振型电源控制器,可简化设计,提高生产力和改善性能。FSR2100集成了带快速恢复体二极管的功率MOSFET,高边栅极驱动电路,精确电流控制的振荡器,频率限制电流,软起动和内置的保护功能,高达300kHz工作频率,主要应用在PDP和LCD TV,台式PC和服务器,适配器,通信电源和音频电源。
FSFR2100主要特性:
Variable Frequency Control with 50% Duty Cycle for Half-bridge Resonant Converter Topology
High Efficiency through Zero Voltage Switching (ZVS)
Internal SuperFET™s with Fast-Recovery Type Body Diode (trr=120ns)
Fixed Dead TIme (350ns) OpTImized for MOSFETs
Up to 300kHz OperaTIng Frequency
Pulse Skipping for Frequency Limit (Programmable) at Light-Load CondiTIon
Remote On/Off Control Using Control Pin
Protection Functions: Over-Voltage Protection (OVP), Over-Load Protection (OLP), Over-Current Protection (OCP), Abnormal Over-Current Protection (AOCP), Internal Thermal Shutdown (TSD)
FSFR2100应用:
PDP and LCD TVs
Desktop PCs and Servers
Adapters
Telecom Power Supplies
Audio Power Supplies
图1。FSFR2100内部方框图
图2。FSFR2100典型应用电路图(LLC谐振半桥转换器)
采用FSFR2100的LLC谐振半桥转换器参考设计
参考设计主要特性:
High efficiency ( >94% at 400VDC input)
Reduced EMI noise through zero-voltage-switching (ZVS)
Enhanced system reliability with various protection functions
图3。采用FSFR2100的LLC谐振半桥转换器参考设计电路图