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CSD87330Q3D Fiches technique(PDF) 9 Page - Texas Instruments

No de pièce CSD87330Q3D
Description  Synchronous Buck NexFET??Power Block
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
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CSD87330Q3D Fiches technique(HTML) 9 Page - Texas Instruments

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CSD87330Q3D
www.ti.com
SLPS284C – AUGUST 2011 – REVISED APRIL 2013
APPLICATION INFORMATION
Equivalent System Performance
Many of today’s high performance computing systems require low power consumption in an effort to reduce
system operating temperatures and improve overall system efficiency. This has created a major emphasis on
improving the conversion efficiency of today’s Synchronous Buck Topology. In particular, there has been an
emphasis in improving the performance of the critical Power Semiconductor in the Power Stage of this
Application (see Figure 28). As such, optimization of the power semiconductors in these applications, needs to
go beyond simply reducing RDS(ON).
Figure 28.
The CSD87330Q3D is part of TI’s Power Block product family which is a highly optimized product for use in a
synchronous buck topology requiring high current, high efficiency, and high frequency. It incorporates TI’s latest
generation silicon which has been optimized for switching performance, as well as minimizing losses associated
with QGD, QGS, and QRR. Furthermore, TI’s patented packaging technology has minimized losses by nearly
eliminating parasitic elements between the Control FET and Sync FET connections (see Figure 29). A key
challenge solved by TI’s patented packaging technology is the system level impact of Common Source
Inductance (CSI). CSI greatly impedes the switching characteristics of any MOSFET which in turn increases
switching losses and reduces system efficiency. As a result, the effects of CSI need to be considered during the
MOSFET selection process. In addition, standard MOSFET switching loss equations used to predict system
efficiency need to be modified in order to account for the effects of CSI. Further details behind the effects of CSI
and modification of switching loss equations are outlined in TI’s Application Note SLPA009.
Figure 29.
Copyright © 2011–2013, Texas Instruments Incorporated
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