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TI E2E Community 11/11/2019 14:49
With the publication of the new Institute of Electrical and Electronics Engineers 802.3bt standard, the power range of Power over Ethernet (PoE) loads continues to expand. If you are designing systems that provide PoE, this presents a challenge. You may need to provide 5 W of power to a low-end Internet Protocol camera or 70 W to a high-end wireless access point (WAP). An enterprise switch with 48 ports that can simultaneously support 90 W on all ports would require a 4.3-kW supply. You probably want to enable the full functionality of the high-end WAP, but do you really want to pay for the giant power supply? Knowing the typical use case of your system, you can choose a smaller power supply that would be sufficient in most situations. But,
TI E2E Community 11/10/2019 20:04
Wireless earbuds have infiltrated the electronics market in recent years. Users can now walk away from their streaming devices without the fear of being yanked back by a caught wire. True wireless earbuds are Bluetooth ®-based wireless earbuds that have their left and right channels separated into individual housings. And while this innovation has freed consumers from having to be connected to their phones by a wire, it has also presented a host of new design challenges for earbud manufacturers. To maximize battery life and support long battery runtime, it’s important to ensure an efficient charge with the earbuds seated properly in their charging case. Magnetic sensors helpensure proper earbud seating because they use magnets to detect fin.
TI E2E Community 11/08/2019 04:04
アダプティブ・ヘッドライト・システム | リア・ライトのアニメーション | パーソナライズされた車内照明 | カスタマイズされた明るいパドル・ライト | 透明ウィンドウ・ディスプレイ 車載照明は、驚くべき速さで進化し続けています。LED光源により、効率の改善と独自な車体デザインが可能になってきており、OEMは斬新かつ有用なライティング用途の実現に取り組んでいます。この技術記事では、ヘッドライト、リア・ライト、車内照明システムのロードマップに影響を与えている半導体技術のいくつかに注目したいと思います。 アダプティブ・ヘッドライト・システム アダプティブ・フロント・ライト・システム(AFS)とアダプティブ・ドライビング・ビーム・ヘッドライト・システム(ADB)は、それぞれロービームとハイビームの形状を調整する技術です。アダプティブ・ヘッドライトはヨーロッパの車には取り付けることができるものの、米国の自動車メーカーがこの先進的ライトを使用することは許されませんが、それも近いうちに変わるでしょう。これらのアダプティブ・システムは光源に高出力LEDを使用するため、求める明るさになるよう電流を調整する高出力LEDドライバが必要です。高い効率を達成するためにスイッチングLEDドライバを使用し、熱管理に応した2段の電力処理トポロジとして実装する必要があります。 1段目の昇圧型電圧レギュレータは、変動が大きい車載入力電圧を管理し、中間の定電圧レールを生成します。2段目の降圧型電流レギュレータは、動的なLED負荷に適した低い出力容量で実装されます。しかし、LEDドライバはスイッチング・レギュレータとして実装されるため、電磁環境適合性(EMC)の問題に取り組む必要が出てきます。 LED ドライバお.
TI E2E Community 11/07/2019 10:48
This article was co-authored by Trevor Dowd. Whether the application is your smartphone, your TV or your car’s headlights, having more pixels is usually better. These additional pixels increase the readability of small text and make small details visible on TVs. New automotive headlight applications like adaptive driving beam (ADB) became available when technology advanced enough to allow 12 or more pixels per headlight. Now, DLP® technology enables carmakers to design cars with 1.3 million pixels per headlight. But what can you do with over 1 million pixels? Automakers today need a lot of pixels in order to enable effective ADB, symbol projection and lane marking applications. However, not many technologies can accomplish all three applica.
TI E2E Community 11/06/2019 11:11
(Please visit the site to view this video) The technology standards and platforms we use to connect have a direct impact on real-time sensing, communication and data sharing, which are vital to business and commerce worldwide. With endless design and connection possibilities, the challenge remains for Internet of Things (IoT) developers to create secure, low-power and robust connections across factory, building and other industrial applications. Choosing the right protocols and the right platform for prototyping can be daunting. To help you select the right technology, SimpleLink™ connected microcontrollers (MCUs) support multiple connectivity protocols – including Zigbee®, Thread, Bluetooth® Low Energy, Wi-Fi®, Ethernet and Sub-1 GHz – all.
TI E2E Community 11/05/2019 15:03
It’s not unusual to find industrial automation control equipment like field sensors (for proximity, pressure, flow or temperature, for example) housed in increasingly inconspicuous packages. Figure 1 shows an example of a proximity sensor housed in a tiny screw (which can be as small as 8 mm or in some instances even smaller). While the electronics that go into the housing have to be ultra-small, they still need to be rated for the right parameters to ensure long-term equipment reliability. Figure 1: Typical proximity sensor Addressing the challenges of unregulated input voltages Electronics in smart sensors may include a low-power microprocessor, analog-to-digital signal-processing circuitry and a voltage regulator. Sometimes, designers mi.
TI E2E Community 11/04/2019 05:31
Electrification has created a new paradigm in automotive power systems; whether the design is a hybrid electric vehicle (HEV) or fully electric vehicle (EV), there are new design challenges to address. In this technical article, I’d like to highlight some of the primary challenges in high-voltage current sensing and share additional resources to aid and simplify your design process. For an introduction to current sensing, see our e-book, “ Simplifying current sensing .” High voltage, high current (>200 A or, more commonly, 1,000 A) High voltage (≥400 V) fully electric systems aim to lower the current consumption for the traction system that moves the vehicle. This requires isolating the solution so that the “hot,” high-voltage side can prov.
TI E2E Community 11/02/2019 13:12
Designing a better powertrain is the most significant way to reduce automotive emissions. Whether it’s improving the efficiency of a combustion engine or designing electric vehicles (EVs) or hybrid electric vehicles (HEVs), electrification is powering a massive evolution of the powertrain as we know it. This white paper, Basic considerations for sensors in the powertrain , examines the future of powertrain sensors through the electrification of a vehicle in internal combustion engines (ICEs) and sensors in EVs and HEVs, and their importance in optimizing the powertrain for effectively managing the battery, inverter and motor building blocks.
TI E2E Community 11/01/2019 14:01
During my first visit to the U.S., my brother and I drove from New York City to Columbus, Ohio. Although the 650-KM (400-mile) journey was long, our car’s automatic transmission and cruise control made the trip more comfortable. The effectiveness of an automatic transmission and cruise control relies on the precise control of proportional solenoids and motors, which is made possible with accurate current measurement. Proportional solenoids convert electrical signals into a proportional mechanical force, which allows variance in armature position and force relative to the level of current. Proportional solenoids are used in automotive applications such as automatic transmissions, fuel injection systems, pistons and valves to accurately contr.
TI E2E Community 11/01/2019 03:43
Every day, we see systems in motion all around us, driven by motors. AC motor drives are the most common type of motor drive. They’re used in a variety of industrial applications, such as air conditioning in commercial buildings and factory automation equipment. These industrial applications operate at high voltages (typically 400 V and above) and power levels (typically kilowatts or megawatts), so it is imperative that considerations are made for the safety of human operators and expensive electronics. Isolation is a critical part of creating safe AC motor drive systems and is governed by the International Electrotechnical Commission (IEC) 61800-5-1 safety standard; for more information on the isolation requirements for your system, see th.
TI E2E Community 10/31/2019 17:31
In the cost-driven automotive industry, reducing bill-of-materials (BOM) costs by sharing resources across multiple subsystems (when possible) can give manufacturers an edge. Traditional automotive end-equipments often use independent hardware to control specific functions of the car, and chances to combine functions may be overlooked. Sharing microphones between different automotive audio subsystems not only saves automakers the cost of a microphone – it eliminates the cost associated with microphone plastic enclosures, wiring and installation. These costs likely outweigh the cost of a microphone or a codec. In this article, I’ll discuss an effective way to share hands-free voice command recognition and eCall microphones using TI’s automot.
TI E2E Community 10/31/2019 14:21
When it comes to cost-effectively powering space-constrained, high-power-density applications, such as solid-state drive (SSD) or wearable equipment, wafer chip-scale package (WCSP) DC/DC converter solutions are widely used in the industry. The trend toward even tighter integration into system-in-package (SIP) modules poses an increasing challenge to established packaging techniques, forcing engineers to look for new ways of optimizing thermal performance in space-constrained applications. Thermal performance and solution size, particularly maximum profile height, are very real challenges that every SIP designer experiences. As the designer of a low-form-factor SIP module for your next application, you may be searching for a power device th.
TI E2E Community 10/31/2019 12:27
This post was co-written with Rahland Gordon and Robert Ferguson. As the world becomes increasingly automated, it’s imperative for the technology we interact with every day to detect and respond to ever-changing environmental factors. For example, vacuum robots must course-correct based on furniture placement, and automatic doors should open and close based on movement detection. These reactions need to occur for a range of distances and materials, regardless of their behavior, color or size. The good news is that no matter what environment you need to monitor, there are a range of proximity sensors from which to choose, including ultrasonic, optical time-of-flight (ToF) and millimeter-wave (mmWave) sensors. Selecting the right option may n.
TI E2E Community 10/31/2019 09:00
車のリア・ライト・システムは、単なる減速の合図から、自動車ブランドの象徴を表すものへと、進化を続けています。 自動車メーカーの独自設計に対応しながらも、合図としての機能は保っていなければなりません。この記事では、リア・ライト・システムのトレンドと、トレンドにより生まれた課題、そしてこのような課題に対処できるTIの新しいLEDドライバを詳しく解説します。 トレンドの1つ目は、ブランド・アイデンティティを象徴的に見せる、車のテール・ランプを使った独特なアニメーションです。車載ライティングによる複雑なアニメーションの要望が高まっており、それにはLEDを個別に制御する必要があります。しかし、車載ライティング・アプリケーションを個別に制御するのに必要な多数のLEDを駆動するうえで、十分な数のアナログLEDドライバを使用できないという設計課題がまずあります。ピクセル制御の照明アプリケーションを実質的に駆動することができるのは、デジタル・インターフェイスを備えたLEDドライバだけです。図1は、従来のテール・ランプと新型のテール・ランプのピクセル制御アーキテクチャを示しています。 図 1 :ピクセル制御に関する従来型と新型のテール・ランプ・アーキテクチャ 車載リア・ライト・システムのマーケット・トレンドの2つ目は、車のテール・ランプの形がだんだん横に長くなっていることです。場合によっては、図2のように、車体のリアエンドの端から端までテール・ランプ延びています。 図 2 :横に延びるテール・ランプ テール・ランプがリアエンドの両端まで延びるということは、プリント基板全体にわたる配線も長くなるということです。LEDドライバはマイコンに直接接続する必要があるため、従来のシングル・エンド・インターフ.
TI E2E Community 10/30/2019 12:29
One of the significant challenges for embedded systems developers is how to efficiently and accurately configure their systems. Today’s advanced microcontrollers (MCUs) include a variety of processor cores, hardware accelerators, advanced radios, sophisticated peripherals and interfaces, and come in packages with elaborate pin multiplexing schemes. Software examples from many semiconductor suppliers can provide a starting point for embedded designs, but developers typically have to make modifications to various parameters, events and variables in order to optimize the software for a specific application. These modifications often entail reviewing many pages of technical documentation to identify and update specific registers or lines of sou.
TI E2E Community 10/29/2019 09:36
When starting a new design, engineers are often overwhelmed by the number of package options for power metal-oxide semiconductor field-effect transistors ( MOSFET s) and power blocks . For example, TI offers single N-channel MOSFETs in 12 unique packages. Given this myriad of options, how do you know which package to select for your application? There are many considerations when choosing a component package, including through-hole vs. surface mount, size, cost, lead spacing and thermal capability. In this technical article, I’d like to focus on package thermal capability and provide some rules of thumb for power dissipation in TI MOSFET and power block packages. I hope that you’ll find these rules helpful, because power dissipation determi.
TI E2E Community 10/29/2019 04:00
Cruising downhill on a nighttime motorcycle ride in Los Angeles’ downtown arts district, Robert Sabel came within seconds of losing his life. “I was cruising through the green light well below the speed limit when a truck coming toward me turned on his high beams and blinded me," said Robert, who owns and operates a company that designs and remanufactures customized motorcycles. “I could tell I was veering close to the sidewalk." Even worse, the oncoming truck decided at the last moment to make a left turn across Robert’s path. “I had to lay down the bike to avoid hitting the curb, sliding a good fifty feet," he said. “I was lucky to be alive." There’s encouraging news for motorists like Robert: Smart headlights may soon brighten America’s
TI E2E Community 10/29/2019 03:34
常に進化を続けるテクノロジーには、モジュール方式の、より小型で性能重視なソリューションが求められています。 電源モジュール は、ソリューション・サイズの小型化と基板面積要件への対応に役立ちますが、設計の柔軟性が低下する可能性もあります。電源モジュールによるソリューション・サイズの縮小と同時に、過渡応答の改善にもさらなる努力が重ねられてきました。最近の多くの DC/DCレギュレータ や電源モジュールは、内部にループ補償を組み込んだり、ループ補償が不要になる動作アーキテクチャを備えたりして、非常に使い勝手がよくなっています。しかし、そのことで設計性能の細かい調整が難しくなる場合もあります。 高い精度での高速過渡応答の課題に対応 プロセス・テクノロジーの進化とともに、プロセッサが求める電圧の精度が厳しくなり、コア電圧は低下しています。表1は、 FPGA (Field Programmable Gate Array)のデータシートの抜粋ですが、V CCINT 電圧レールの推奨動作条件は1Vプラスマイナス30mVです。電圧がこの3%の範囲から外れるとプロセッサが予期せぬ振る舞いをする可能性があるため、この範囲内に電圧を維持することが推奨されます。したがって、負荷変動の間も3%の範囲内の条件を満たすには、DC/DCコンバータの出力の静電容量を増やす必要があるかもしれません。 記号 最小 標準 最大 単位 FPGAロジック V CCINT 0.97 1.00 1.03 V 0.87 0.90 0.93 V V CCBRAM 0.97 1.00 1.03 V 0.87 0.90 1.03 V 表 1 : FPGA ( Field Programmable Gain Array )の推奨動作条.


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