Condensation Modeling in LED Headlight Development

July 30, 2015  by  

MentorGraphics-condensation-headlight-modelingCondensation 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.

What’s New and What’s Next for the “Connected Car”

July 28, 2015  by  

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.

Scott Frank

Scott Frank


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.

Hydrogen-Based Leak Detectors Reduce Testing Time and Cost

July 14, 2015  by  

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INFICON Sentrac Probe

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

July 14, 2015  by  

DI0828-AP3726-AP3796Q_Showcase_ImageThe AH376xQ family of AECQ100-qualified Hall effect latches introduced by Diodes Incorporated offers eight magnetic sensitivity options to cover the requirements of numerous 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.

Teledyne LeCroy Adds 2kV and 8kV Safety-Rated High Voltage Differential Probes

July 10, 2015  by  

TTELEDYNELECROY 7-10-15 _hvd3605_probeeledyne LeCroy introduced two new additions to the HVD3000 series of high voltage differential probes — the 2 kV safety-rated HVD3206 and the 8.4 kV safety-rated HVD3605.

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).

TI Half-Bridge Gate Driver Improves Power System Performance in Hybrid Behicles

July 8, 2015  by  

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120-V High-Side/Low-Side Gate Driver Reduces Switching Loss; Minimizes Noise for Greater Efficiency and Longer Mileage

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

Allegro MicroSystems Announces Next-Generation Latch Using Vertical Hall Technology

June 26, 2015  by  

allegro 6-26-15 A1260-Product-ImageIncreased User Design Flexibility with Highly Sensitive Switch Thresholds

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 Introduces a New Generation 24GHz Radar-Based Driver Assistance System

June 26, 2015  by  

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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.

Exit Alert
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.

Toshiba Adds Motor Driver IC For DC Brushed Motors In Vehicle Engine Applications

June 26, 2015  by  

toshiba 6-26-15 6719A_HRESToshiba America Electronic Components, Inc. (TAEC) announced a small-sized motor driver IC for DC brushed motors used in vehicle engine applications such as electronic throttles and valve controls.

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.

Vishay SMD Flat Chip Temperature Sensors Offer Enhanced Thermal Cycling for Temperatures to +175 °C

June 25, 2015  by  

Devices Offer Stability of Temperature Characteristic of ≤ 0.1 % for Automotive Electronics

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.

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