Industrial Electronics

New 650 V CoolSiC hybrid IGBT discrete family offers superior efficiency

08 February 2021

Infineon Technologies AG has launched a 650 V CoolSiC hybrid insulated-gate bipolar transistor (IGBT) portfolio in a discrete package with 650 V blocking voltage. The CoolSiC hybrid product family combines key benefits of the 650 V TRENCHSTOP 5 IGBT technology and the unipolar structure of co-packed Schottky barrier CoolSiC silicon carbide diodes. With superior switching frequencies and reduced switching losses, the devices are especially suited for DC-DC power converters and power factor correction. These can typically be found in applications like battery charging infrastructure, energy storage solutions, photovoltaic inverters, uninterruptable power supplies, and server and telecom switched-mode-power supplies.

Due to a freewheeling SiC Schottky barrier diode co-packed with an IGBT, the CoolSiC hybrid IGBTs perform with significantly reduced switching losses at almost unchanged dv/dt (rate of voltage rise Source: Infineon Technologies AGSource: Infineon Technologies AGapplied) and di/dt (the rate the current increases through the device when turned on) values. They offer up to 60% reduction of energy-on and 30% reduction of energy-off compared to a standard silicon diode solution. Alternatively, the switching frequency can be increased at least by 40% with unchanged output power requirements. A higher switching frequency will allow reducing passive components size and thus lower bill-of-material cost. The hybrid IGBTs can be used as a drop-in replacement for TRENCHSTOP 5 IGBTs allowing an efficiency improvement of 0.1% for each 10 kHz switching frequency without redesign efforts.

The product family creates a bridge between pure silicon solutions and high performing SiC MOSFET (metal-oxide semiconductor field-effect transistor) designs. In comparison to pure silicon designs, hybrid IGBTs can improve electromagnetic compatibility and system reliability. Because of the unipolar nature of Schottky barrier diodes, the diode can switch fast without severe oscillations and risk of a parasitic turn-on. Customers can choose between a TO-247-3 or a TO-247-4 pin Kelvin emitter package. The fourth pin of the Kelvin emitter package allows for an ultra-low inductance gate-emitter control loop and reduces the total switching losses.

The discrete portfolio comprises 40 A, 50 A and 75 A 650 V TRENCHSTOP 5 ultra-fast H5 IGBTs co-packed with half-rated CoolSiC Gen 6 diodes, or medium speed S5 IGBTs co-packed with full-rated CoolSiC Gen 6 diodes.

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