基于FSR2100设计的高效半桥谐振型电源技术

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