Liberty Access Technologies

Nexperia’s new AEC-Q101 MOSFETs tested to 1 billion cycles

Semiconductor manufacturer Nexperia has launched a new AEC-Q101-qualified Repetitive Avalanche Application-Specific FET (ASFET) portfolio focused on powertrain applications. The company says the devices have been tested to 1 billion avalanche cycles, and can be used to control automotive inductive loads such as solenoids and actuators. In addition to providing a faster turn-off time (up to 4X), designs can be simplified through a reduced BOM count.

MOSFET-based power schemes for solenoid and actuator control in automotive powertrains are typically built around boost, free-wheel diode or active clamp topologies. A fourth option is a repetitive avalanche design that dissipates energy from the inductive load by making use of the MOSFET’s ability to repeatedly handle current from the inductive load during switch-off. Offering comparable efficiencies to active clamp alternatives, such designs eliminate the need for diodes and other devices to minimize component count and circuit complexity. They also support faster switch-off times, a factor that can extend the reliability of electromechanical components such as solenoids and relays. Until now this has only been possible using outdated planar technology. Nexperia says its Automotive Repetitive Avalanche ASFET family of products has been specifically developed to address this issue, by guaranteeing repetitive avalanche functionality tested up to 1 billion cycles. In addition, when compared to boost topologies, they can simplify designs by providing up to 30% component footprint efficiency due to a possible reduction of up to 15 board components.

Qualified to AEC-Q101 at 175° C, the new MOSFETs are available in 40-volt and 60-volt options with typical RDS(ON) ratings from 12.5 mΩ to 55 mΩ. All of the devices are supplied in the company’s space-saving LFPAK56D (Dual Power-SO8) copper-clip package technology. The package features gull-wing leads for increased board-level reliability, improved manufacturability and automated optical inspection (AOI).

Product Manager Richard Ogden explained, “Typically, engineers looking to implement repetitive avalanche topologies have had to rely on devices that use older, planar semiconductor technologies. Offering automotive-qualified devices with guaranteed repetitive avalanche capabilities that are based on higher-performance silicon structures will increase the number of powertrain designs that can take advantage of repetitive avalanche functionality.”

Chinese-built Tesla Model 3 ranks high in quality survey

Tesla starts delivery of Chinese-made Model 3 sedans on December 30, 2019Tesla Model 3 electric cars built at the company’s Shanghai factory scored well in a Chinese-market J.D. Power quality survey, according to a recent South China Morning Post report. Tesla was ranked second in quality among battery-electric cars in the survey, behind Chinese automaker Nio, the report said. However, both brands’ scores—113…
Source: Hybrid and Electric Car News and Reviews

EGEB: Japan to scrap gas-powered cars by mid-2030s

In today’s Electrek Green Energy Brief (EGEB):

  • Japan aims to abolish gas-powered vehicles in the next 15 years.
  • Massachusetts reaches a deal to make 40% of its electric power green by 2030.
  • South Korea will replace all diesel trains with an electric bullet train by 2029.
  • UnderstandSolar is a free service that links you to top-rated solar installers in your region for personalized solar estimates. Tesla now offers price matching, so it’s important to shop for the best quotes. Click here to learn more and get your quotes. — *ad.

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Source: Charge Forward