Littelfuse/Commercial Vehicle Products

These devices are developed using a charge compensation principle and proprietary process technology, resulting in Power MOSFETs with significantly reduced resistance RDS(on) and gate charge Qg. A low on-state resistance reduces the conduction losses; it also lowers the energy stored in the output capacitance, minimizing the switching losses. A low gate charge results in higher efficiency at light loads as well as lower gate drive requirements. In addition, these MOSFETs are avalanche rated and exhibit a superior dv/dt performance. Also due to the positive temperature coefficient of their on-state resistance, they can be operated in parallel to meet higher current requirements.

Polar™ P-Channel MOSFETS are fabricated using our Polar technology platform, which significantly reduces the on-state resistance (RDSon) by 30% and gate charge (Qg) by 40% in comparison to legacy counterparts, resulting in lower conduction loss and providing excellent switching performance. They are dynamic dv/dt and avalanche rated making them extremely rugged in demanding operating environments and can easily be paralleled due to an on-state resistance with positive temperature coefficient. These MOSFETs are ideal in a variety of applications, with best-in-class performance and competitive pricing. Applications include push-pull amplifiers, buck converters, DC choppers, power solid state relays, CMOS high power amplifiers, high current regulators, and high side switching in automotive and test equipment. The superior ruggedness of the Polar P-Channel Power MOSFETs also makes them suitable devices for motor control and power cut-off switches or power SSRs for energy saving applications. Advantages: Low gate charge results in simple drive requirement High power density Easy to parallel Fast switching

Polar3™ Standard Power MOSFETs are suitable for a wide variety of power switching systems, including high-voltage power supplies, capacitor discharge circuits, pulse circuits, laser and x-ray generation systems, high-voltage automated test equipment, and energy tapping applications from the power grid. Due to the positive temperature coefficient of their on-state resistance, these high-voltage Power MOSFETs can be operated in parallel, thereby eliminating the need for lower voltage, series-connected devices and enabling cost-effective power systems. Other benefits include component reduction in gate drive circuitry, simpler design, improved reliability, and PCB space saving. Advantages: Easy to mount Space savings High power density

These devices are offered with drain-to-source voltage ratings from 40V to 170V and provide high current capabilities of up to 600 Amperes (Tc=@25oC). The combined high current ratings of these devices and available compact package options provide designers the ability to control more power within a smaller footprint. Furthermore, these devices promote device consolidation through the reduction or elimination of multiple paralleled lower current rated MOSFET devices in high power switching applications. The resultant effect is a reduction in part count, as well as the number of required drive components, thus improving upon over-all system simplicity, reliability, and cost. Advantages: Eliminates multiple paralleled lower current rated MOSFET devices Provides the ability to control more power within a smaller footprint Improves overall system reliability and cost

The Very High Voltage series of N-Channel Standard MOSFETs are specifically designed to address demanding, fast-switching power conversion applications requiring very high blocking voltages up to 4.5kV. Thanks to the positive temperature coefficient of their on-state resistance, these very high voltage MOSFETs are ideally suited for parallel device operation, which provides cost-effective solutions compared to series-connected, lower-voltage MOSFET ones. This also results in reduction in the associated gate drive circuitry, further simplifying the design, saving PCB board space, and improving the reliability of the overall system. Advantages: Easy to mount Space savings High power density

These devices are offered with drain-to-source voltage ratings from 40V to 170V and provide high current capabilities of up to 600 Amperes (Tc=@25oC). The combined high current ratings of these devices and available compact package options provide designers the ability to control more power within a smaller footprint. Furthermore, these devices promote device consolidation through the reduction or elimination of multiple paralleled lower current rated MOSFET devices in high power switching applications. The resultant effect is a reduction in part count, as well as the number of required drive components, thus improving upon over-all system simplicity, reliability, and cost. Advantages: Eliminates multiple paralleled lower current rated MOSFET devices Provides the ability to control more power within a smaller footprint Improves overall system reliability and cost

Polar3™ Standard Power MOSFETs are suitable for a wide variety of power switching systems, including high-voltage power supplies, capacitor discharge circuits, pulse circuits, laser and x-ray generation systems, high-voltage automated test equipment, and energy tapping applications from the power grid. Due to the positive temperature coefficient of their on-state resistance, these high-voltage Power MOSFETs can be operated in parallel, thereby eliminating the need for lower voltage, series-connected devices and enabling cost-effective power systems. Other benefits include component reduction in gate drive circuitry, simpler design, improved reliability, and PCB space saving. Advantages: Easy to mount Space savings High power density

Polar™ P-Channel MOSFETS are fabricated using our Polar technology platform, which significantly reduces the on-state resistance (RDSon) by 30% and gate charge (Qg) by 40% in comparison to legacy counterparts, resulting in lower conduction loss and providing excellent switching performance. They are dynamic dv/dt and avalanche rated making them extremely rugged in demanding operating environments and can easily be paralleled due to an on-state resistance with positive temperature coefficient. These MOSFETs are ideal in a variety of applications, with best-in-class performance and competitive pricing. Applications include push-pull amplifiers, buck converters, DC choppers, power solid state relays, CMOS high power amplifiers, high current regulators, and high side switching in automotive and test equipment. The superior ruggedness of the Polar P-Channel Power MOSFETs also makes them suitable devices for motor control and power cut-off switches or power SSRs for energy saving applications. Advantages: Low gate charge results in simple drive requirement High power density Easy to parallel Fast switching

Depletion mode MOSFETs, unlike the regular enhancement type MOSFETs, require a negative gate bias to turn off. Consequently they remain on at or above zero gate bias voltage but otherwise have similar MOSFET like characteristics. They are suitable for level shifting, solid state relays, current regulators, and active loads.