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Novel package for IGBTs from Infineon boosts power density

06 Nov 2014

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Infineon Technologies AG has extended its IGBT portfolio by unleashing a variant of the TO-247 package. According to the company, the TO-247 4 Kelvin-Sense package targets the needs for increased power density and space saving in applications requiring high efficiency.

When used together with Infineon's TRENCHSTOP 5 IGBT and Rapid diode technologies, the innovative TO-247 4 package provides efficiency levels previously not available, stated the company. Applications such as uninterruptible power supplies (UPS), data centres and telecommunications equipment, with PFC and inverter stages switching at greater than 20kHz, will profit from the latest package, said Infineon.

The 4-pin configuration offers a Kelvin-Sense connection to significantly reduce the emitter inductance in the gate driving loop. This is achieved by providing an additional connection to the IGBT emitter that serves as the reference potential for the driver. The 4-pin version enables customers to increase switching frequency in order to improve power density and reduce system costs. Comparing the TO-247 4-pin variant using TRENCHSTOP 5 IGBT and Rapid diode technologies with standard TO-247 3, the latest package provides 20 per cent lower turn-off losses and 15 per cent lower turn-on losses, detailed the company. Combined, the total switching losses are reduced by about 20 per cent leading to an unparalleled efficiency.


Lead customers have proven that by implementing the TO-247 4 package for EU ENERGY STAR certified UPS, for example, power density can be doubled and efficiency can also be improved significantly. This enables high power interchangeable UPS racks to be more compact, thus requiring smaller buildings to house the UPS systems, reduce the cooling effort needed and improve the overall system costs. According to the ENERGY STAR organisation, an ENERGY STAR certified UPS can cut energy losses in the range of 30-55 per cent. Here the package makes the task of the designer easier to achieve the efficiency goals.

Samples of the TO-247 4 discrete IGBTs are available upon request; customers can choose either from the co-packed freewheeling diode, Rapid 1, optimised for low forward voltage (V F), or Rapid 2, optimised with low reverse recovery charge (Qrr). Additionally a demo board is available to make the comparison between TO-247 3 and TO-247 4 packages easy, added Infineon.

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