industry news
Subscribe Now

Coupled inductors from TT Electronics are perfect for automotive DC/DC converter applications

Shielded surface SMD inductors are highly efficient

Woking, UK, 30 June 2017 – TT Electronics, a global provider of engineered electronics for performance critical applications, today launched the HA78D series of coupled inductors for use in DC/DC converter applications.  With their high temperature rating and AECQ200 certification, they are ‘automotive ready’ for the latest generation of motor vehicles.

The HA78D series shielded SMD inductors have been designed specially for use in DC/DC converter configurations including flyback, multi-output buck, SEPIC* and Zeta applications. With their high leakage inductance they are ideal for SEPIC applications where the loosely coupled winding improves the SEPIC efficiency by reducing circulating current and provides twice the ripple current reduction compared to separate inductors.

In a motor vehicle there are more than 80 electronic applications. Each of these uses an ECU, and each ECU requires a DC/DC converter. In 2015, 40% of the total cost of a car was attributable to its electronics. It can be seen that the design of the DC/DC converter for automotive applications is a challenging task when one considers all the requirements that need to be met. Accordingly, inductors are vital components for achieving the necessary performance and power requirements of automotive DC/DC converters.

TT Electronics’ HA78D series comprises of four inductors; the HA78D-L128100MLFTR, HA78D-L128220MLFTR, HA78D-L128330MLFTR and HA78D-L128470MLFTR. When parallel connected, their inductance ratings at 100kHz are 10, 22, 33 and 47 micro Henries consecutively.

The inductors offer high efficiency and excellent current handling in a rugged housing, and with their low losses ferrite cores they are ideal for high frequency DC/DC converter and VRM/VRD applications.  Particularly, their wide -50 to 155°C operating temperature range and AECQ200 certification make them ideal for high stress environments.

Exhibiting versatility, the RoHS compliant inductors can also be used as two single inductors connected in series or parallel or as a common mode choke as a filter inductor for EMI noise reduction.

In the automotive market, the inductors are suitable for applications including lighting, hybrid car, start and stop vehicle, and electrical power steering.  Other applications include industrial, telecom, VRM and PoL.

The HA78D series embraces TT Electronics’ holistic approach to inductor design to create products that are feature rich, safe, highly efficient and reliable.  The result is designs and manufacturing solutions for magnetic devices that have a systematic adherence to safety standards and quality as is required by the automotive industry.  The designs allow for smaller and lighter components with more reliable circuits that enhance safety and lower the risk of liability for customers.

TT Electronics is shown to have high quality, reliable products based on empirical saturation current data, core loss test data, and company wins with major automotive and industrial suppliers.

For further information visit www.ttelectronics.com/magnetics.

* SEPIC (single ended primary inductance converter) is the most popular DC/DC converter topology used in LED drivers in the automotive industry.  In this topology the output voltage can be higher or lower than the input voltage. The topology combines characteristics of buck and boost converters and in most cases operates in CCM (continuous conduction mode).  As far as the LED drivers in automotive applications are concerned, they don’t need insulation between the input and output sides of the DC/DC converter, so SEPIC topology is ideal for this kind of application.

About TT Electronics plc
TT Electronics is a global provider of engineered electronics for performance critical applications. It works with market-leading customers in the transportation, industrial, medical, and aerospace and defence sectors.
With headquarters in Woking, UK, TT Electronics employs approximately 6000 staff and operates from 27 locations around the world. It has four divisions: Transportation Sensing and Control, Industrial Sensing and Control, Advanced Components, and Integrated Manufacturing Services.

For more information about TT Electronics visit http://www.ttelectronics.com.

Leave a Reply

featured blogs
Feb 23, 2018
The IEEE-SA has a policy of keeping standards active by making sure they get a cycle of updates every 10 years. Including Verilog, SystemVerilog has been going on a cycle of updates every 5±1 years since 1995. I wrote here about the updates to 1800-2009 and 1800-2012, and no...
Feb 23, 2018
What is a software GPS, what does it have to do with Tensilica DSP IP, and why would anyone care? To answer that, let's start with a quiz from the transportation industry. How many shipping containers are currently in transit around the world? It turns out that no one kn...
Feb 22, 2018
We’ve spent a good chunk of the last year building a new on-site search experience for Samtec.com. This update continues that trend with our newly released competitor cross reference search addition. Using this feature, you can access competitor cross reference data for...
Jan 19, 2018
Artificial intelligence (AI) is reshaping the way the world works, opening up countless opportunities in commercial and industrial systems. Applications span diverse markets such as autonomous driving, medical diagnostics, home appliances, industrial automation, adaptive webs...