Source: TTI article
Murray Slovick in TTI article highlights some passive components technologies that were released during summer vacation time.
Summertime has come and gone, and it’s back to the grind. So, what happened during vacation time?
Well, only a spoilsport would say so, but here’s the cold reality: a lot of new components were introduced while you were building sand castles at the seashore, fishing on a lake, hiking through the mountains or visiting some remote corner of the Earth.
But worry not: even though you may have been temporarily untethered from the electronics design world, we’ve put together a brief summary of components designed for automotive, industrial and other challenging applications – all introduced in recent months while you were less than your usual attentive self. This way, you’ll be up to date and have time to get to the unenviable task of responding to unanswered email and dealing with that line of people who need your help with work.
Here’s what’s new and notable, sorted by supplier and in roughly chronological order with the most recent developments first.
CAN FD Noise Reduction
In the automotive industry, technologies that control basic vehicle behavior are advancing rapidly with the aim of providing safer and more comfortable driving. In keeping with market demand, faster automotive networks are required for connecting ECUs, sensors and motors, with the result that the conventional Controller Area Network (CAN), which transmits data at a rate of up to 1 megabit per second (Mbps), is being replaced with the faster CAN FD.
To ensure stable communication in all automotive networks, it is essential to reduce electronic noise from in-vehicle sources. The transition from CAN to the faster CAN FD requires more stringent noise-reduction measures. Conventional common mode choke coils (CMCCs) for CAN support DCMR Class 1 or, in the case of high-precision products, Class 2. Class 3 products are required for CMCCs used in CAN FD, according to IEC62228-3 (the CAN specification defined by the IEC).
To meet CAN FD Class 3 requirements, Murata Manufacturing has introduced the wire-wound CMCC (DLW32SH101XF2). By minimizing the difference in characteristics between the two coils comprising the CMCC and by controlling DCMR degradation, this product is said to be the world’s first CMCC to support DCMR Class 3.
With an operating temperature range of -40 C up to 125 C, the AEC-Q200-compliant part measures just 3.2mm x 2.5mm thanks to Murata’s wire-wound structure.
Hybrid Polymer Aluminum Electrolytic Capacitors
TDK ‘s hybrid polymer aluminum electrolytic capacitors are now available in 25 V DC / 330 µF and 35 V DC / 270 µF versions, each with dimensions of 10 x 10.2 mm. The capacitors, which are RoHS-compatible and qualified to AEC-Q200, are designed for a maximum operating temperature of 125 C and offer a service life of at least 4,000 hours, according to TDK.
Two electrical parameters in particular characterize these capacitors: their low ESR value of ≤20 mΩ and the high ripple current capability of 2.8 A at 125°C and 100 kHz. TDK says that these values are made possible by the hybrid polymer technology.
Since ECUs require a high-speed, low-latency communication in advanced driver assistance systems (ADAS) and autonomous driving, Automotive Ethernet is becoming the communication infrastructure of choice for today’s vehicles.
In response, TDK also has expanded its lineup of multilayer varistors with the new AVRH10C101KT1R1NE8 for automotive Ethernet. The product features a capacitance of just 1.1 ± 0.3 pF, ensuring signal integrity even at high data rates. With its IEC 1005 package (1.0 x 0.5 x 0.5 mm), this varistor has a 75 percent smaller volume than existing components, according to TDK. The component, which is qualified to AEC-Q200, features a maximum operating voltage of 70 V and an operating temperature range from -55 C up to 150 C, expanding its range of possible applications.
Shunt Resistors for Hybrid Vehicles and Automotive Power
The emergence and rising adoption of hybrid electric vehicles remains a key catalyst in the global shunt resistor market. What’s more, the industry has transitioned from using multiple low-power devices to a single high-power resistor in AEC-Q200 qualified devices as these resistors save space and increase measurement accuracy.
To capitalize on this opportunity, Vishay has rolled out two new resistor models – WFPA3939 and WFPB3939. Both produce low resistance values from 2 mΩ to 8 mΩ. Further, the parts feature a metal manganese-copper and nickel-chromium alloy resistive element with low TCR, low inductance values of < 10 nH and low thermal EMF.
These automotive-grade power metal plate shunt resistors leverage a copper heat spreader, which results in a 20 W power rating for a 3939-size package with Kelvin terminals. The new resistors are operational from -65 C to 170 C. Their automotive electronics applications include power steering systems, power supplies for instrumentation, and battery management systems for electric and hybrid vehicles.
EMI Suppression Film Capacitors
Vishay also has added three new series of X1, X2 and Y2 electromagnetic interference (EMI) suppression film capacitors for standard across the line and line bypass applications. The new F340 EMI suppression family is certified to IEC 60384-14: 2013 ed. 4 / AMD1: 2016 grade IIIB, “High Robustness Under High Humidity.”
To comply with the IEC humidity grading system, these Vishay BC components withstand temperature humidity bias (THB) testing of 85 C and 85 percent relative humidity for 1,000 hours while biased at the rated AC voltage with high stability regarding capacitance, dissipation factor and insulation resistance. The company says this translates into longer service life under harsh application conditions for industrial and automotive power electronics, such as battery chargers, renewable energy inverters, motor drives and UPS.
The F340X1 is designed for a rated voltage of 480 VAC. It offers a capacitance range from 0.22 F to 8.2 µF while withstanding operation voltages up to 530 VAC to ensure compliance with permissible voltage variations on three-phase mains. The F340X2 has a rated voltage of 305 VAC and provides a capacitance range from 1 µF to 20 µF with ripple current capabilities up to 18 A at 10 kHz. Also featuring a rated voltage of 305 VAC, the F340Y2 is qualified in accordance with AEC-Q200, Automotive Grade and provides a capacitance range from 0.01 µF to 1 µF.
Power Inductors for Industrial and Communications Applications
TT Electronics has kicked it up a notch with two new series: the HM66M series of surface mount device (SMD) power inductors for use in high-frequency power conversion systems and EMI filter applications, and the HM78M series of power inductors for use in high-density and high-frequency DC/DC converter applications.
The HM66M series is designed for industrial and telecommunications markets. HM66M is a shielded, miniature low-profile SMD inductor that integrates a ferrite material core for permeability and temperature advantages. Characterized by low losses at high frequencies, these inductors are suitable for power supplies and frequency converters that operate with fast GaN switching power semiconductors. Power inductance is optimized within a frequency range from 700 kHz to 4 MHz, and an operating temperature of 125 C. The HM66M series is offered in three standard case sizes: 60, 70 and 84.
TT Electronics’ HM78M series power inductors are shielded, ferrite-based SMD inductors designed for use in high frequency DC/DC converter configurations popular in industrial markets. With high inductance and current values, these power inductors offer a switching frequency configuration range of 100 kHz to 3 MHz, making them suitable as a buck converter or an EMI filter. TT Electronics’ HM78M series comes in two standard package sizes, 10 and 20.
Automotive manufacturers require passive components that endure a wide temperature range, high humidity conditions, noise intrusion, EMI and high mechanical vibration and shock, ensuring many years of reliability.
Eaton has extended its HCM1AV2 family of inductors designed to meet power and thermal handling requirements for automotive electronics. The HCM1AV2 family has a variety of SMT footprints from 4.0 mm to 23.0 mm. Eaton’s inductors use a molded construction design for high current handling capabilities of up to 100 A and, according to the company, good thermal dissipation characteristics and superior mechanical strength. This construction makes the HCM1AV2 suitable for high vibration and shock conditions, Eaton says.
These inductors are magnetically shielded to reduce EMI effects on other devices in the automotive engine compartment, and are said to have low core loss and temperature stability over the operating temperature range as well as featuring low DC resistance (DCR).
The HCM1AV2 inductors are AEC-Q200 Automotive Grade 1 compliant with a maximum operating temperature range of -55 C to 155 C (ambient plus self-temperature rise).
Thick Film Resistors for Harsh Environments
Earlier this summer, Bourns unveiled a new sulfur-resistant, AEC-Q200 compliant thick film resistor family. The Bourns Model CRxxxxA-AS chip resistor series is offered in eight different footprints from 0201 (0603 metric) to 2512 (6432 metric) with rated power from 0.05 to 1 watt. These new surface-mount chip resistors also feature a resistance range from 1 ohm to 20 mΩ, making them a good choice for a variety of general-purpose applications.
Bourns designed these resistors to operate in certain harsh environments with higher levels of sulfur contamination. They are manufactured using a thick film element printed onto a ceramic substrate, and tested in accordance with ASTM B809-95 methods, which tests for the porosity of metallic coatings exposed to humid sulfur vapor.
Even though summer is over, these new innovations will give electronics designers a lot to consider in the cold months ahead.