July 30, 2015 by News Editor
Condensation in automotive head lights can be detrimental to consumer acceptance of a product and in certain instances lead to recalls and warranty issues. This presentation describes a numerical method for transient simulation of liquid film formation process on the surface of an element in a head light as part of a CFD thermal analysis.
Automotive LED headlight reliability and optical performance requires careful thermal design especially due to LED operating temperature & radiometric performance. As part of this condensation simulation topic, adequate radiative heat transfer modeling is described on using a “band” Monte-Carlo radiation model. This enables proper simulation of the focusing influences of semi-transparent materials (glass, plastic), reflective and refractive surfaces in a complex headlight design.
July 28, 2015 by News Editor
We were curious about the current state of connected car technology, and so we posed questions to Scott Frank, VP of marketing at Airbiquity, a major supplier of connected vehicle services. Airbiquity’s cloud-based Choreo connected car service delivery platform serves customers in over 50 countries and 30 languages.
Q: Do automakers in general have the same set of priorities for “the connected car” or do their priorities differ?
A: At this stage of connected car evolution automaker priorities differ because they are in the process of working out the business objectives and strategic approaches for their programs.
More than 1,000 leak tests are performed on the average car and its components before a vehicle rolls off a final assembly line and into a new-car showroom. Fuel, brake and other critical safety systems are tested multiple times for leaks, as well as driveline components, fluid containers and wheels.
An increasing number of leak tests are conducted with hydrogen-based leak detectors, which are less expensive than helium-based systems and significantly better than more traditional water and pressure-decay methods, according to Thomas Parker, North American automotive sales manager for INFICON, a global supplier of leak-detection systems.
Diodes Incorporated New Hall Effect Latch Features Wide Range of Sensitivity Options for Automotive Applications
Such uses include commutation, encoding and position control of the various motors, pumps, fans and valves found in vehicle cabins for operating windows, sun roofs, seats, tailgates and air-conditioning.
These Hall effect latches can also be used in the engine bay for steering and sensing the speed and position of the crankshaft, camshafts, cooling fans, and water, oil and fuel pumps.
July 10, 2015 by John Day
The firm said the probes provide superior performance and meet specific industry test needs per the latest industry standards. Like the existing 1 kV safety-rated HVD310x probes, these new probes are said to provide excellent performance by offering the best gain accuracy, widest differential voltage range, high offset range and exceptional common-mode rejection ratio (CMRR).
July 8, 2015 by John Day
Texas Instruments (TI) (NASDAQ: TXN) introduced what it said is the industry’s fastest 120-V automotive grade half-bridge gate driver with robust handling features.
The driver, UCC27201A-Q1, provides a propagation delay at 15ns with short rise and fall times and the tightest delay matching of 1ns for 12-V to 48-V DC/DC power supplies. The UCC27201A-Q1 high-side/low-side gate driver offers advanced noise tolerance, resulting in improved overall system performance for hybrid vehicles.
For more details, see www.ti.com/UCC27201A-Q1-pr.
Allegro MicroSystems, LLC announced a new Vertical Hall-effect Sensor IC that the company said is an extremely temperature-stable and stress-resistant magnetic sensing device ideal for harsh operating environments.
Allegro’s A1260 is actuated by alternating north and south polarity magnetic fields in plane with the device’s branded face rather than perpendicular to the branded face, as in a traditional Hall-effect sensor. This enables system designers to achieve new mechanical configurations not feasible with traditional planar Hall sensors, including replacing through-hole SIP devices with tiny surface-mount SOT23 ICs, saving space and cost.
HELLA is introducing a new generation of its 24GHz radar-based driver-assistance technology.
With production starting in June 2015 at HELLA’s U.S. manufacturing plant in Flora, Ill., HELLA is launching their new generation 3.5 radar sensor system as a complement to its generation 3.0 system, which has been in production since last year.
In addition to blind spot detection, lane change assist, rear cross traffic alert and rear pre-crash functionalities, which are already in series production, HELLA’s new system adds a fifth function to the OEM’s safety portfolio. The exit alert function is currently in pre-production status and ensures the safety of all road users; pedestrians, cyclists and other vehicles when exiting the car.
The new TB9051FTG, housed in a small, flat 6mm x 6mm P-QFN28 package, employs double-diffused MOSFET (DMOS FET) transistors as driver circuits.
As with its recently announced line of DMOS FET transistor arrays, Toshiba selected DMOS FET devices for the TB9051FTG driver circuits. As these devices do not require base current biasing, they have virtually no input current, which lets them process high current density per device area with low on-resistance. This enables low output voltage drop – in turn, allowing the new motor driver IC to operate with a high degree of efficiency.
June 25, 2015 by John Day
Vishay Intertechnology, Inc. (NYSE: VSH) announced a new AEC-Q200-qualified version of its PTS series platinum SMD flat chip temperature sensors.
Designed to provide accurate and stable temperature sensing for automotive, space, and industrial electronics, Vishay Beyschlag PTS AT series devices combine enhanced thermal cycling performance with higher operating temperatures to +175 °C.
Thanks to a highly controlled platinum thin film manufacturing process, the new sensors offer an outstanding stability of temperature characteristic of ≤ 0.1 % after 1,000 hours, ensuring precise and reliable operation even under harsh conditions. Typical applications for the devices include A/T controllers, oil quality/level sensor modules, and ARS controllers.