This article is part of the能源管理Series:本周在PowerBites
CALL FOR PAPERS: Show off Your Power Prowess at PowerUP Virtual Expo 2021
The PowerUP Expo is welcoming potential presenters to submit papers for their three-day virtual conference and exhibition, focused on the frontiers of power technology. This year's program includes topic-specific session keynotes, panel discussions, technical presentations, and tutorials about major technical trends, market requirements, and new applications areas.
该活动特别强调电力电子产品在汽车，工业和消费者等各个市场的“绿色”中的作用。许多会议将探讨如何使用电力设备来改善节能应用程序以及所有高压工业应用中的系统性能。其他人将探索与功率相关的促成技术，以提供各种新功能，从而增强车辆和智能网格性能，安全性和功能。
与会议平行的将是一个展览，其中包括来自领先的电力电子公司的虚拟摊位。实时聊天工具使访客可以直接联系展位人员。
会议议程以及有关如何在Powerup提交论文演示的建议的详细信息可在此链接中找到。
Integrated Automotive LED Driver Simplifies Innovative Lighting Designs
和STMicroelectronics’ALED6000single-chip automotive LED driver that integrates a dc-dc converter and other features, designers can speed up development of application-specific, low-BOM (bill of materials) lighting designs that maintain a constant lighting intensity across a wide range of supply voltages. Suitable for exterior lighting such as daytime running lights, headlights, rear lights, stop lights, and turn signals, as well as interior lighting, the ALED6000 drives a single string of LEDs at up to 3 A and has an input-voltage range of 4.5 to 61 V.
ALED6000实现数字调光，并包括专用引脚来应用脉冲宽度调节（PWM）控制信号。该设备的启用和同步引脚可用于确保多设备应用中的低噪声。输出电流（可在3.2％以内）通过具有典型的电压下降为250 mV的感应电阻有效监控。静态电流极低，仅在2.4mA的操作中，关闭时为11 µA。ALED6000还具有VBIAS辅助输入引脚和脉搏滑动操作，可确保整个负载范围的高效率。
The driver's on-chip converter can be used in buck, buck/boost, and floating-boost topologies, enabling it to power LED strings that require a voltage above or below the input voltage. In addition, the converter can operate in low-dropout mode with close to 100% duty cycle if the input voltage falls near or below the programmed output.
在过电流条件下，ALED6000调用逐脉冲保护以限制输出电流。还包括可编程的软启动电路和自动恢复的热保护。可以使用外部组件选择输出电流限制和转换器开关频率。这使电感器与低ESR电容器结合使用，以提高高能效率，快速动态响应，小尺寸和低输出纹波。
AEC-Q100 qualified, the ALED6000 automotive LED driver is in production now in the HTSSOP16 package, priced from $2.25 for orders of 1,000 pieces. Designers can jump-start their projects using the STEVAL-ILL089V1 evaluation kit. For additional information, go towww.st.com/buck-current-regulators。
Single-Stage, Constant-Voltage Flyback Controllers for Smart LED Drivers Up To 125 W
TheICL8800,ICL8810, andICL8820single-stage flybackLED控制器由Infineon Technologies开发的使设计产品更容易解决不断增长的市场，以可调节性能可调节和智能MOSFET的LED系统最多125W。它们提供恒定输出电压和其他独特功能的能力，提供必要的性能要求为了LED lightingapplications, such as LED drivers and luminaires,智能照明, and emergency luminaires. Additional applications includeadapters and chargers，平板电视，多合一PC和监视器。
All three variants offer benchmarked performance for power factor correction and total harmonic distortion at full-load and low-load conditions. They also support critical conduction mode (CCM) and quasi-resonant mode (QRM) with smart valley hopping to maximize efficiency and reduce EMI. While they’re optimized for use as secondary-side-regulated (SSR) constant-voltage (CV) output flyback controllers, they also can be used for primary-side regulation (PSR).
ICL8800提供了外部启动电路控制信号，以提高灵活性和一系列全面的保护功能，包括功率限制和次要过电压保护。结果是一个成本优化的自下而上平台，可以用最少的外部组件实施广泛的应用程序。
ICL8810是用于智能照明应用程序的8800的高级变体。它增加了一个集成的爆发模式，该模式允许低于100兆瓦的备用功率消耗非常低，无闪烁的深度调低至0.1％。
The ICL8820 is the fully featured variant, additionally equipped with an integrated dc-input jitter function. The latter improves EMI performance and supports the fulfillment of EMI requirements in dc operation. The ICL8820 helps ease EMI certification in LED-driver design for emergency-lighting applications without additional circuitry, minimizing cost and effort.
Availability
The ICL8800, ICL8810 and ICL8820 single-stage flyback LED controller variants are available in PG-DSO-8 packages and can be ordered now. More information is available atwww.infineon.com/icl88。
汽车背光驱动器在冷曲柄条件下保持恒定的亮度
Maxim集成产品recently unveiled its four-channel, low-voltage MAX25512automotiveLED backlight driver with integrated boost converter. To lower BOM cost and board space requirements, the single-chip LED driver eliminates the need for an external MOSFET and current-sense resistor. It integrates an I2C communication interface that can be used to adjust PWM channel settings, invoke diagnostics, and communicate its status. The highly integrated LED driver includes four 120-mA channels with 91% efficiency at 2.2-MHz operation.
The MAX25512 also is one of only a few integrated solutions that retain full, constant brightness of in-car displays with the extremely low supply voltages found in vehicles with weak or cold batteries—and the only one that can do this under severe cold-crank conditions down to 3-V input voltage. This is important because today’s automotive start-stop systems can make it difficult for a vehicle's power-delivery system to maintain constant display brightness during restart.
Offered in a small 24-pin, 4- × 4- × 0.75-mm quad flat no-lead (QFN) package, the MAX25512’s level of integration shrinks solution size by 30% by eliminating external components.
Availability and Pricing
The MAX25512 backlight LED driver and associatedMAX25512EVKITevaluation kit are available now from Maxim Integrated and authorized distributors; pricing is available upon request. For additional information on the MAX25512, visithttps://bit.ly/MAX25512Products。
IEEE's Energy Conversion Conference Comes to Vancouver and Cyberspace
The Energy Conversion Conference and Expo (ECCE) is making its West Coast rotation to Vancouver, Canada, October 10-14, 2021. The flagship conference for the IEEE Industrial Application Society (IAS) and Power Electronics Society (PELS) is the world’s largest podium for presenting the latest power electronics, electric machines, and drives research, their applications, and engineering training.
和over 1,600 attendees (2019), multiple educational tutorials, technical sessions, industry panels, social events, and a public Exhibit Hall, the conference offers an ideal opportunity to meet with existing customers. Typically, half in attendance are international, which gives the exposure needed to forge new customer relationships.
ECCE's program includes a full schedule oftechnical sessions,tutorials, and a series ofSpecial Sessions该解决了电力转换行业中最重要的技术问题的25个。特别会议主题包括：
- Cybersecurity for Power Electronics
- SIC/GAN网格应用程序的进步，以支持EV和可再生能源
- Dynamic Modeling and Simulation for Reliable and Resilient Operation of Future Grids
- Additive Manufacturing for Electric Machines
- 分布式能源的电力电子技术
对于那些无法参加活动的人，该程序将使用广泛采用的虚拟事件平台VFAIRES并行运行，为参与者提供最接近的“亲自”体验。展览会在会议出席率高的前两天举行。
On day one, join industry leaders, entrepreneurs, and top researchers as they address attendees during the Plenary Sessions, followed by the Expo and Welcome Reception, which will offer complimentary food, beverage, and plenty of booth traffic. Visitwww.ieee-ecce.org/2021有关更多信息并确保您在演出中的位置。
Photovoltaic-Output Photocoupler Offers Increased Open Voltage for Isolated Solid-State Relays
来自东芝电子欧洲is suitable for driving the gates of high-voltage power MOSFETs used to develop a galvanically isolated solid-state-relay (SSR) function. Housed in a thin SO6L package measuring just 3.84 × 10 × 2.1 mm, it integrates a photo-TRIAC, a phototransistor, or a photothyristor.
设备通常用于应用程序require ON/OFF control of large electrical currents in industrial equipment such as I/O relay outputs in PLCs, inrush current protection in power supplies, and battery voltage monitoring in battery-management systems (BMS), as well as switching the power and signal lines in instrumentation applications.
The new TLP3910 has a minimum open voltage (VOC) of 14 V, enabling a single device to drive the gate of most high-voltage power MOSFETs. Until now, driving power MOSFETs with a gate voltage of 10 V or higher would require connecting two photocouplers, such as Toshiba’s TLP3906, in series due to their low open voltage (typically around 7 V). As a result, many high-power designs can take advantage of improved reliability, less PCB space, and lower BOM cost.
The TLP3910 also incorporates an improved discharge circuit with a typical turn-off time (tOFF) of 0.1 ms, about one-third that of the TLP3906 and about one-thirtieth that of the TLP191B. The new photocoupler also has a faster typical turn-on time (tON) of 0.3 ms. The TLP3910 is Toshiba’s first photovoltaic coupler to feature a minimum isolation voltage (BVS) of 5000 V rms while maintaining the excellent performance of the current products (TLP191B and TLP3906). This, along with the creepage distance of 8 mm and relevant UL/cUL approvals, enables use in industrial equipment driven by 400-V ac systems and other applications where electrical safety is paramount.
The high-temperature operation (TOPR) range of −40 to +125°C ensures that the TLP3910 is suited to a wide range of rugged applications. The TLP3910 is currently in volume production. For more information, visithttps://toshiba.semicon-storage.com/eu/semiconductor/product/optoelectronics/detail.tlp3910.html。
XEV，充电器和光伏电源系统的混合IGBT提高效率和性能
罗姆的RGWxx65C series of IGBTs (RGW60TS65CHR,RGW80TS65CHR,RGW00TS65CHR)由于享受显著提高效率a co-packaged low-loss SiC Schottky barrier diode that's used in the device's feedback block. By functioning as a freewheeling diode that consumes virtually no recovery energy, it minimizes the devices' diode switching losses. In addition, since the recovery current doesn’t have to be handled by the IGBT in turn-on mode, it also significantly lowers turn-on loss.
Together those features reduce power losses in vehicle chargers and other high-power applications by up to 67% compared to conventional IGBTs, and up to 24% compared with superjunction MOSFETs (SJ MOSFETs). The devices' high efficiency and integration enable them to deliver good cost performance while contributing to lower power consumption in automotive and industrial systems.
Applications include automotive chargers (on-board chargers), vehicle dc-dc converters, solar power inverters (power conditioners), and uninterruptible power supplies (UPS).
A broad range of design support material is available on Rohm’s website, including simulation (Spice) models and application notes on drive circuit design. Clickhereto access the company’s design support information.
Availability
The RGWxx65C series of IGBTs is sampling now, with mass production anticipated for December 2021. In addition to these novel hybrid IGBTs, Rohm also offers products utilizing silicon fast recovery diodes (FRDs) as the freewheeling diode, as well as products without a freewheeling diode.
集成电源断开解决方案为更快，更安全的直流电铺平了道路
A unique disconnect solution for EV chargers developed bySensata Technologiesoffers safer, more effective system protection and faster, easier installation than traditional solutions based on conventional contactors and thermal fuses. Key to the new power contactor module is the integration of advanced contactors and fuses.
This integrated solution was created to help EV charging systems safely deliver the faster charging times demanded by consumers, which may operate at up to 1,000 V and up to 350 kW. In addition to the ability to reliably break connections at these higher voltages and currents, these contactors must be able to provide safe circuit continuity in the event of a hazardous short-circuit event. In addition to meeting these requirements, Sensata’sGigaFuseproducts offer a smaller, more reliable solution than fuses that are required to be used in tandem for these applications.
Sensata’s packaged power disconnect module includes high-voltage contactors and GigaFuses harnessed to a mounting plate that reduces risk of damage and increases thermal performance. As a result, the module offers several advantages over a conventional dc thermal fuse, including:
- Response to overload is 3 ms or less; faster than a conventional dc thermal fuse.
- Opens the circuit closer to normal operating conditions without "nuisance tripping."
- A unique electromechanical triggering mechanism that pairs more easily with the contactor.
- Lower thermal resistance; typically, 0.15 mΩ, allowing it to run cooler for less thermal aging.
To learn more, go towww2.sensata.com/dcfc-solutions。此外，一张名为“ GigaFuse最大化高级电池系统安全性”的白皮书IS在这里可用。
Design Tutorial: Stability Analysis and Decoupling for Modular DC‑DC Systems
Vicor'stutorial series "How to Design Modular DC‑DC Systems" is a pithy toolbox of well-written information-rich lessons that take you on deep dives into several less well-understood issues of power design. One of the more enlightening installments is a tutorial on稳定性分析。与以前的分期付款一样模块化设计策略anddesigning application-appropriate filtering, it introduces the principles of stability analysis and the math that underpins them, and then uses practical examples to demonstrate how they can be applied.
The tutorial begins by demonstrating how to separate the source and load elements so that their impedance can be analyzed and understood separately. This includes modeling the source and load's frequency-dependent finite impedances. This is followed by analyzing their combined stability to determine if a decoupling network is required and calculating the values of the necessary components.点击这里to access this tutorial.
该系列中的其他四个教程是：
- 如何设计模块化DC -DC系统，第1部分：设计的四个阶段
- How to design modular DC‑DC systems, part 2: filter design
- 如何设计模块化DC -DC系统，第4部分：安全保护系统
- How to design modular DC‑DC systems, part 5: load considerations
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