TO-247 4ピンパッケージ

概要

A new innovative package using Kelvin source concept

With new generations of power switches becoming faster and faster, the effect of the parasitic elements of package and board limit more and more the overall system performance. An effective measure to overcome this problem is to provide an additional connection to the source (Kelvin connection), that is used as a reference potential for the gate driving voltage, thereby eliminating the effect of voltage drops over the source inductance. The achievable efficiency improvement, resulting from faster switching transients, can in fact be significant.

Infineon offers the TO-247 4-pin in conjunction with the 600 V and 650 V CoolMOS™ C7 superjunction (SJ) MOSFETs. With the 600 V CoolMOS™ P6 SJ MOSFET Infineon introduces an improved version of the standard TO-247 4-pin package. The TO-247 4-pin with asymmetric leads comes along with increased creepage distance between the critical leads and enables smoother wave soldering and reduced board yield loss.

Features

Benefits

Applications
  • 4th pin capability enables Kelvin source connection
  • Increased creepage distance between high voltage pins
  • Gate signal optimization
  • Asymmetric leads increase critical pin distance
  • Reduces parasitic source inductance effects on the gate circuit enabling faster switching and increased efficiency
  • Using benefits of Kelvin source efficiency to increase MOSFET RDS(on) and reduce BOM cost
  • Creepage distance meets 5000m altitude requirement
  • Easier to design by customer
  • Enabling simplified wave soldering and improved board yield loss

  • Performance gain of 0.6% full load efficiency can be achieved if the same die is used in a 4-pin versus a 3-pin package.
  • Lower full load losses with 4-pin part allow for next ‘smaller’ MOSFET (60mΩ instead of 45mΩ), enabling a BOM cost reduction with better low load efficiency.

 

  • Parasitic source inductance counteracts drive voltage
  • Separate pin “source-sense” (Kelvin source) delivering an undisturbed signal to the driver
  • Up to 3x lower switching losses lead to
    • Higher efficiency
    • Cost reduction potential in application

 

With 600 V CoolMOS™ P7 Infineon introduces an improved version of the standard TO-247 4-pin package.

The TO-247 4-pin with asymmetric leads comes along with increased creepage distance between the critical leads and enables smoother wave soldering and reduced board yield loss.

  • Isolated driver 1EDI60N12AF like for high side switch setup enables the floating of the kelvin source
  • No displacement current in the control circuit due to the isolation of the driver
  • Flexible driver supply: isolated and none isolated can be used
  • Kelvin source pin oscillates due to induced voltage spike on source inductance referring to power ground
  • MOSFET can be seen like high side switch in half bridge
  • Primary to secondary driver isolation eliminates impact to gate signal

Isolated driver 1EDI60N12AF is highly recommended.

製品
詳細

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