Passive Components for CO2 Emissions Reduction

Passive Components for CO<sub>2</sub> Emissions Reduction

Bourns’ automotive CO2 emissions reduction component solutions are designed to meet the requirements of increasingly stringent air pollution guidelines. Micro hybrid vehicles use stop-start systems and regenerative braking to help achieve the desired reduction in carbon emissions. They rely on 48V starting motors that can restart the engine quicker than a 12V starter. The starter/generator requires a DC/DC converter to efficiently change the alternator output voltage from 48V to 12V in order to charge the battery. A DC/DC converter is also needed to convert the battery voltage from 12V to 48V in order to drive the starter motor. High powered inductors and current sense resistors that can provide the very low DC resistance (Rdc) characteristics needed for power conversion and supply requirements are important for efficient DC/DC converter designs in automotive applications.

PQ Flat Wire Wound Shielded Power Inductors – The company’s PQ flat wire wound shielded power inductors are characterized as low winding resistance and high saturation current of over 100A. These AEC-Q200-qualified power inductors exhibit low DC and AC resistance, as well as low power dissipation which can boost the overall efficiency of DC/DC converters. Typical applications include automotive power conversion, DC/DC converters, power supplies, consumer, industrial, medical, and communication electronics.

Current Sense Resistors – The high-powered model CSS series current sense resistors come in both 2-terminal and 4-terminal options and are manufactured using a metal element. Each family has a range of low resistance options and power ratings of up to 9W with resistance values as low as 0.5mΩ. These resistors detect and convert current to an easily measured voltage which is proportional to the current through the device.