NXP TEA1995TGreenChip同步整流(SR)电源解决方案

NXP公司的TEA1995T是新一代同步整流(SR)控制器GreenChip,集成了自适应栅极驱动以在任何负载下效率最大化,包括有驱动SR MOSFET的两个驱动级,电源电压4.5 V到38 V,节能状态下的工作电流小于200uA,主要用在适配器,台式PC电源,电视机电源和服务器电源.本文介绍了TEA1995T主要特性和优势,框图,应用电路图和评估板TEA1995DB1294主要特性,电路图,材料清单和PCB布局图.
The TEA1995T is the first product of a new generation of Synchronous Rectifier (SR)controller ICs for switched mode power supplies. It incorporates an adaptive gate rive method for maximum efficiency at any load.
The TEA1995T is a dedicated controller IC for synchronous rectification on the secondary side of resonant converters. It has two driver stages for driving the SR MOSFETs, which rectify the outputs of the central tap secondary transformer windings. The two gate driver stages have their own sensing inputs and operate independently.
The TEA1995T can also be used in multi-output flyback converters with the SR MOSFET placed at the low side.
The TEA1995T is fabricated in a Silicon-On-Insulator (SOI) process.
TEA1995T主要特性和优势:
1．效率特性:
 Adaptive gate drive for maximum efficiency at any load
 Supply current in energy save operation below 200 uA
2．应用特性:
 Wide supply voltage range from 4.5 V to 38 V
 Dual synchronous rectification for LLC resonant in SO8 package
 Synchronous rectification for multi-output flyback converters
 Supports 5 V operation with logic level SR MOSFETs
 Differential inputs for sensing the drain and source voltages of each SR MOSFET
3.控制特性:
 SR control without minimum on-time
 Adaptive gate drive for fast turn-off at the end of conduction
 UnderVoltageLockOut (UVLO) protection with active gate pull-down
TEA1995T应用:

The TEA1995T is intended for resonant power supplies. In such applications, it can drive two external syn...