熱點頻道

詮鼎力推Semtech AC DC 二次側同步整流控制IC方案

 2017-10-25

TS4305是用於AC-DC電源二次側整流的同步整流控制器。

 

方案原理圖如下:

 

 

一、產品特性

  • Current-sense control for low-side synchronous rectifiers
  • Rectifier turn on/off thresholds set with external resistors
  • Minimum ON and OFF time to minimize GATE turn-on oscillation
  • UVLO configurable to 9V or 4V
  • Wide supply range 4.5V to 24V
  • Gate drive internally limited to 5V or 10V
  • 2A sink, 1A source gate drive
  • 2mm x 2mm DFN-8 & 4mm x 5mm SOIC-8 packages
  • Product is lead-free, Halogen Free, RoHS / WEEE compliant

 

二、方案優势:

  • Vds sense is not ideal: body diode recovery and parasitics negatively impacts Ton/off timing
  • Instead, TS4305 detects SR current crossing optimized thresholds for SR turn on and off
    • Both SR FET turn-on and turn-off current thresholds are adjustable with external resistors which allow developers to minimize SR FET diode conduction loss while designing in timing margin to protect against reverse conduction of the SR FET.
    • TS4305 delivers conversion efficiency at or higher than traditional

 

 

 

想要進一步瞭解代理商資訊,請造訪詮鼎集團www.aitgroup.com.tw

想要瞭解更多Semtech產品資訊,請造訪http://www.semtech.com

或以下代理商e-mail詢問。