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Fairchild FAN6208 LLC电源同步整流控制妄图

宣布时间:2012年07月07日 13:07    宣布者:1770309616
要害词: Fairchild , FAN6208 , LLC电源 , 同步整流
Fairchild 公司的FAN6208是用于绝缘的LLC或LC谐振转换器的同步整流(SR)控制器,能驱动两个伶仃 SRMOSFET,经由历程监测每个SR的漏-源极电压来丈量每个开关周期的SR导通时间,从而一定SR栅极驱动的最好时间.具有先进的输入短路/过载掩护和超温掩护(OTP),主要用在 LCD TV, PC电源和开架开关电源.本文简介了FAN6208主要特点,方框图,应用电路图和FEBFAN6208_CP433v1评价板主要目的,电路图,质料清单和PCB结构图.

FAN6208 is a synchronous rectification (SR) controller for isolated LLC or LC resonant converters that can drive two individual SR MOSFETs emulating the behavior of rectifier diodes. FAN6208 measures the SR conduction time of each switching cycle by monitoring the drain-to-source voltage of each SR and determines the optimal timing of the SR gate drive. FAN6208 uses the change of opto-coupler diode current to adaptively shrink the duration of SR gate drive signals during load transients to prevent shoot-through. To improve lightload efficiency, Green-Mode operation is employed, which disables the SR drive signals, minimizing gate drive power consumption at light-load condition.

Optimal timing circuits and protection functions are integrated in an 8-pin SOP package, which allows highefficiency power supply design with fewer components.

FAN6208主要特点:

 Specialized SR Controller for LLC or LC Resonant Converters

 Secondary-Side Timing Detection with Timing Estimator

 Gate-Shrink Function to Prevent Shoot-Through During Load and Line Transient

 Green-Mode Function for Higher Efficiency at Light- Load Condition

 Programmable Dead Time between Primary-Side Gate Drive Signal and SR Drive Signal

 Advanced Output-Short / Overload Protection Based on the Feedback Information

 Internal Over-Temperature Protection (OTP)

 VDD Pin Over-Voltage Protection (OVP)

FAN6208应用:

 LCD TV

 PC Power

 Open-Frame SMPS
20120706093723350.gif
图1.FAN6208方框图

20120706093724568.gif
图2.FAN6208应用框图
20120706093725181.gif
图3.FAN6208应用电路图
图3应用电路图主要目的:
20120706093725819.gif
FEBFAN6208_CP433v1评价板

This user guide supports the FAN6208 Secondary-Side Synchronous Rectifier evaluation board.

FEBFAN6208_CP433v1评价板主要目的:
20120706093726282.gif
2012070609372786.gif
图4.FEBFAN6208_CP433v1评价板形状图
20120706093727278.gif
图5.FEBFAN6208_CP433v1评价板电路图

FEBFAN6208_CP433v1评价板质料清单:
20120706093727113.gif
20120706093728802.gif
20120706093728492.gif
图6.FEBFAN6208_CP433v1评价板PCB结构图:上,顶部;下,底部

概略请见:
FAN6208.pdf (1.78 MB, 下载次数: 10)

FEBFAN6208_CP433v1.pdf (597.51 KB, 下载次数: 5)

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mxh0506 揭晓于 2012-7-7 20:13:28
评价板焊工太差了, 出来见人之前也不洗洗.
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